Just compilation
Hi, ALL, I'm trying to incorporate the path in http://sourceforge.net/p/mysql-python/bugs/325/. I already modified the source code and now what I need is to produce the pyc code. Running "python --help" I don't see an option to just compile the source into the bytecode. So how do I produce the compiled version of the changed source? What I'm thinking is to compile the file update the archive and reinstall. Please help. Thank you. -- https://mail.python.org/mailman/listinfo/python-list
Re: [newbie] copying identical list for a function argument
Op maandag 3 februari 2014 23:19:39 UTC+1 schreef Steven D'Aprano: > On Mon, 03 Feb 2014 13:36:24 -0800, Jean Dupont wrote: > > I have a list like this: > > [1,2,3] > > > > The argument of my function should be a repeated version e.g. > > [1,2,3],[1,2,3],[1,2,3],[1,2,3] (could be a different number of times > > repeated also) > > > > what is the prefered method to realize this in Python? > > I don't really understand your question. It could mean any of various > things, so I'm going to try to guess what you mean. If my guesses are > wrong, please ask again, giving more detail, and possibly an example of > what you want to do and the result you expect. > I think you mean that you have some function that needs to take (say) > five arguments, and you want to avoid writing: > result = function([1, 2, 3], [1, 2, 3], [1, 2, 3], [1, 23], [1, 2, 3]) > because it's too easy to make a mistake (as I did, deliberately, above -- > can you see it?). > If my guess is correct, try this: > mylist = [1, 2, 3] > result = function(mylist, mylist, mylist, mylist, mylist) > > That's perfectly reasonable for two or three arguments, but not so much > for five. Instead, here's a trick: first we make five identical > references to the same list: > [mylist]*5 # same as [mylist, mylist, mylist, mylist, mylist] > then expand them as arguments to the function: > mylist = [1, 2, 3] > list_of_lists = [mylist]*5 > result = function(*list_of_lists) > (The * operator means multiplication when used between two arguments, and > inside a function call a leading * also does argument expansion.) > > But wait... there's something slightly weird here. Even though there are > five distinct references to mylist, they're all the same list! Change > one, change all. This may be what you want, or it may be a problem. Hard > to tell from your question. > Think about references as being a little bit like names. A *single* > person could be known as "son", "Dad", "Mr Obama", "Barack", "Mr > President", "POTUS", and more. In this case, we have a single list, [1, > 2, 3], which is known by six references: the name "mylist", and five > additional references list_of_lists index 0, list_of_lists index 1, and > so on up to list_of_lists index 4. > We can prove that they all refer to the same list by running a bit of > code in the interactive interpreter: > > py> mylist = [1, 2, 3] > py> list_of_lists = [mylist]*5 > py> list_of_lists > [[1, 2, 3], [1, 2, 3], [1, 2, 3], [1, 2, 3], [1, 2, 3]] > py> mylist.append(99) > py> list_of_lists > [[1, 2, 3, 99], [1, 2, 3, 99], [1, 2, 3, 99], [1, 2, 3, 99], [1, 2, 3, > 99]] > > So rather than having five references to the same, identical, list, you > might want five *copies*. You can copy a list using slicing: > mylist = [1, 2, 3] > copy = mylist[:] > Instead of using list multiplication to repeat five identical lists, we > make five copies using a list comprehension: > list_of_lists = [mylist[:] for i in range(5)] > then expand it in the function call as before: > result = function(*list_of_lists) > > Hope this helps, Yes it does, thanks a lot to you and all the others who responded, "the missing link" which until now I wasn't aware of but which was essential for the solution was the "*" in result = function(*list_of_lists) kind regards, jean -- https://mail.python.org/mailman/listinfo/python-list
Re: [newbie] making rows of table with discrete values for different number systems
Op maandag 3 februari 2014 20:50:04 UTC+1 schreef Asaf Las: > On Monday, February 3, 2014 9:37:36 PM UTC+2, Jean Dupont wrote: > > Op maandag 3 februari 2014 16:34:18 UTC+1 schreef Asaf Las: > > > > Of course you don't have to, but I'm curious and learn well by examples > > :-( > > Hi Jean > > Don't get me wrong i did not mean to be rude (was joking) - i > think if you will do it yourself that will be very good for > you - you can learn a lot from that as i did not very long time ago. > My apologies for inconvenience. no hard feelings, anyway I am programming it myself using normal functions, when I have finished it I'll post it, then maybe you can do it with lamba-notation, it could be interesting to compare execution times for the two approaches kind regards, jean -- https://mail.python.org/mailman/listinfo/python-list
Re: Just compilation
On 04Feb2014 00:58, Igor Korot wrote: > I'm trying to incorporate the path in > http://sourceforge.net/p/mysql-python/bugs/325/. > I already modified the source code and now what I need is to produce > the pyc code. > > Running "python --help" I don't see an option to just compile the > source into the bytecode. > > So how do I produce the compiled version of the changed source? > What I'm thinking is to compile the file update the archive and reinstall. You want the py_compile module, parse of the stdlib. Example: python -m py_compile path/to/foo.py I use this in my personal test suite as a syntax check. See the python docs for this module for further details. Cheers, -- Cameron Simpson A friend of mine in a compiler writing class produced a compiler with one error message "you lied to me when you told me this was a program". - Pete Fenelon -- https://mail.python.org/mailman/listinfo/python-list
Re: Postfix conditionals
"GöktuğKayaalp" wrote in message news:mailman.6377.1391490975.18130.python-l...@python.org... "BartC" writes: "Göktuğ Kayaalp" wrote in message news:mailman.4966.1388953508.18130.python-l...@python.org... AFAIK, we do not have "postfix conditionals" in Python, i.e. a condition appended to a statement, which determines whether the statement runs or not: py> for i in [False]: ... break if not i What are your thoughts on this? I develop my own language (not Python, but also dynamic and interpreted). (First, some apologies; I thought the OP was dated February not January!) Would love to see that, if possible! (If you're into Python, then I doubt it because I don't have classes or any of those other Pythonic things that people like. However my language is a lot less dynamic and therefore can be much faster. I have a few interesting variations on statements as well; syntax is cheap and I don't know why many languages, Python included, have such a paucity of control and selection statements. I also have a project that translates my syntax into Python; the intention there was to be able to make use of some of its libraries because I don't have many of my own!) I have this feature, and it's OK, but not indispensible. I varied it a bit by allowing 'if', 'when' and 'unless' as the conditionals, just to break it up a little. However, it just maps internally to a regular if-statement. In Python though, the normal way of writing 'break if not i' is about the same length (in my language it's somewhat longer), so I can't see it getting much support. I do not really think that string length is not of much significance. The actual fact that disallows my proposal from being favoured/implemented is that in Python, `break', `return' and `continue' are statements and the community encourages having one statement per line, so that the source code is easily understandable. With my proposal implemented, the language would would be encouraging having multiple statements in one line, that looks like a single statement, but is indeed a composition of two. But, Python already allows you to combine two statements on a line, as in: if a: s while b: t So your: s if a is little different (although s will need to be restricted; 'if b if a' will look a bit odd). And someone mentioned the ternary expression which looks similar to your proposal. I suppose you can also argue that the if-part is not a statement at all, just an expression that is part of the statement (you'd have to redefine break and other statements to have an optional condition). If written as: break(not i) then it certainly won't look like two statements! Your proposal has the advantage in that it gives more dominance to the statement, making the code somewhat clearer, comparing with burying it inside an if-statement. I rather dislike the statement-orientedness of Python, but still, it is a good device of easening for the language developers and beginners when the fact that we use indentation to denote blocks is considered. (I used to have a syntax where statements and expressions were interchangeable. Now I have them distinct, which makes many things much easier, it picks up more errors (and makes it simpler to translate to translate into languages which aren't quite as expressive!)) -- Bartc -- https://mail.python.org/mailman/listinfo/python-list
Finding size of Variable
Hello, I have 10 files and I need to merge them (using K way merging). The size of each file is around 200 MB. Now suppose I am keeping the merged data in a variable named mergedData, I had thought of checking the size of mergedData using sys.getsizeof() but it somehow doesn't gives the actual value of the memory occupied. For example, if a file in my file system occupies 4 KB of data, if I read all the lines in a list, the size of the list is around 2100 bytes only. Where am I going wrong? What are the alternatives I can try? -- https://mail.python.org/mailman/listinfo/python-list
Re: Finding size of Variable
Ayushi Dalmia wrote: > I have 10 files and I need to merge them (using K way merging). The size > of each file is around 200 MB. Now suppose I am keeping the merged data in > a variable named mergedData, I had thought of checking the size of > mergedData using sys.getsizeof() but it somehow doesn't gives the actual > value of the memory occupied. > > For example, if a file in my file system occupies 4 KB of data, if I read > all the lines in a list, the size of the list is around 2100 bytes only. > > Where am I going wrong? What are the alternatives I can try? getsizeof() gives you the size of the list only; to complete the picture you have to add the sizes of the lines. However, why do you want to keep track of the actual memory used by variables in your script? You should instead concentrate on the algorithm, and as long as either the size of the dataset is manageable or you can limit the amount of data accessed at a given time you are golden. -- https://mail.python.org/mailman/listinfo/python-list
Re: fseek In Compressed Files
On Tuesday, February 4, 2014 2:27:38 AM UTC+5:30, Dave Angel wrote:
> Ayushi Dalmia Wrote in message:
>
> > On Thursday, January 30, 2014 4:20:26 PM UTC+5:30, Ayushi Dalmia wrote:
>
> >> Hello,
>
> >>
>
> >>
>
> >>
>
> >> I need to randomly access a bzip2 or gzip file. How can I set the offset
> >> for a line and later retreive the line from the file using the offset.
> >> Pointers in this direction will help.
>
> >
>
> > This is what I have done:
>
> >
>
> > import bz2
>
> > import sys
>
> > from random import randint
>
> >
>
> > index={}
>
> >
>
> > data=[]
>
> > f=open('temp.txt','r')
>
> > for line in f:
>
> > data.append(line)
>
> >
>
> > filename='temp1.txt.bz2'
>
> > with bz2.BZ2File(filename, 'wb', compresslevel=9) as f:
>
> > f.writelines(data)
>
> >
>
> > prevsize=0
>
> > list1=[]
>
> > offset={}
>
> > with bz2.BZ2File(filename, 'rb') as f:
>
> > for line in f:
>
> > words=line.strip().split(' ')
>
> > list1.append(words[0])
>
> > offset[words[0]]= prevsize
>
> > prevsize = sys.getsizeof(line)+prevsize
>
>
>
> sys.getsizeof looks at internal size of a python object, and is
>
> totally unrelated to a size on disk of a text line. len () might
>
> come closer, unless you're on Windows. You really should be using
>
> tell to define the offsets for later seek. In text mode any other
>
> calculation is not legal, ie undefined.
>
>
>
> >
>
> >
>
> > data=[]
>
> > count=0
>
> >
>
> > with bz2.BZ2File(filename, 'rb') as f:
>
> > while count<20:
>
> > y=randint(1,25)
>
> > print y
>
> > print offset[str(y)]
>
> > count+=1
>
> > f.seek(int(offset[str(y)]))
>
> > x= f.readline()
>
> > data.append(x)
>
> >
>
> > f=open('b.txt','w')
>
> > f.write(''.join(data))
>
> > f.close()
>
> >
>
> > where temp.txt is the posting list file which is first written in a
> > compressed format and then read later.
>
>
>
> I thought you were starting with a compressed file. If you're
>
> being given an uncompressed file, just deal with it directly.
>
>
>
>
>
> >I am trying to build the index for the entire wikipedia dump which needs to
> >be done in a space and time optimised way. The temp.txt is as follows:
>
> >
>
> > 1 456 t0b3c0i0e0:784 t0b2c0i0e0:801 t0b2c0i0e0
>
> > 2 221 t0b1c0i0e0:774 t0b1c0i0e0:801 t0b2c0i0e0
>
> > 3 455 t0b7c0i0e0:456 t0b1c0i0e0:459 t0b2c0i0e0:669 t0b10c11i3e0:673
> > t0b1c0i0e0:678 t0b2c0i1e0:854 t0b1c0i0e0
>
> > 4 410 t0b4c0i0e0:553 t0b1c0i0e0:609 t0b1c0i0e0
>
> > 5 90 t0b1c0i0e0
>
>
>
> So every line begins with its line number in ascii form? If true,
>
> the dict above called offsets should just be a list.
>
>
>
>
>
> Maybe you should just quote the entire assignment. You're
>
> probably adding way too much complication to it.
>
>
>
> --
>
> DaveA
Hey! I am new here. Sorry about the incorrect posts. Didn't understand the
protocol then.
Although, I have the uncompressed text, I cannot start right away with them
--
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Re: Finding size of Variable
On Tuesday, February 4, 2014 5:10:25 PM UTC+5:30, Peter Otten wrote: > Ayushi Dalmia wrote: > > > > > I have 10 files and I need to merge them (using K way merging). The size > > > of each file is around 200 MB. Now suppose I am keeping the merged data in > > > a variable named mergedData, I had thought of checking the size of > > > mergedData using sys.getsizeof() but it somehow doesn't gives the actual > > > value of the memory occupied. > > > > > > For example, if a file in my file system occupies 4 KB of data, if I read > > > all the lines in a list, the size of the list is around 2100 bytes only. > > > > > > Where am I going wrong? What are the alternatives I can try? > > > > getsizeof() gives you the size of the list only; to complete the picture you > > have to add the sizes of the lines. > > > > However, why do you want to keep track of the actual memory used by > > variables in your script? You should instead concentrate on the algorithm, > > and as long as either the size of the dataset is manageable or you can limit > > the amount of data accessed at a given time you are golden. As I said, I need to merge large files and I cannot afford more I/O operations. So in order to minimise the I/O operation I am writing in chunks. Also, I need to use the merged files as indexes later which should be loaded in the memory for fast access. Hence the concern. Can you please elaborate on the point of taking lines into consideration? -- https://mail.python.org/mailman/listinfo/python-list
Re: Finding size of Variable
On Tuesday, February 4, 2014 2:43:21 PM UTC+2, Ayushi Dalmia wrote: > > As I said, I need to merge large files and I cannot afford more I/O > operations. So in order to minimise the I/O operation I am writing in > chunks. Also, I need to use the merged files as indexes later which > should be loaded in the memory for fast access. Hence the concern. > Can you please elaborate on the point of taking lines into consideration? have you tried os.sendfile()? http://docs.python.org/dev/library/os.html#os.sendfile -- https://mail.python.org/mailman/listinfo/python-list
Re: Finding size of Variable
Ayushi Dalmia Wrote in message: >> getsizeof() gives you the size of the list only; to complete the picture you >> >> have to add the sizes of the lines. >> >> >> >> However, why do you want to keep track of the actual memory used by >> >> variables in your script? You should instead concentrate on the algorithm, >> >> and as long as either the size of the dataset is manageable or you can limit >> >> the amount of data accessed at a given time you are golden. > > As I said, I need to merge large files and I cannot afford more I/O > operations. So in order to minimise the I/O operation I am writing in chunks. > Also, I need to use the merged files as indexes later which should be loaded > in the memory for fast access. Hence the concern. > > Can you please elaborate on the point of taking lines into consideration? > Please don't doublespace your quotes. If you must use googlegroups, fix its bugs before posting. There's usually no net gain in trying to 'chunk' your output to a text file. The python file system already knows how to do that for a sequential file. For list of strings just add the getsizeof for the list to the sum of the getsizeof of all the list items. -- DaveA -- https://mail.python.org/mailman/listinfo/python-list
Re: Finding size of Variable
On Tuesday, February 4, 2014 6:39:00 PM UTC+5:30, Dave Angel wrote: > Ayushi Dalmia Wrote in message: > > > > >> getsizeof() gives you the size of the list only; to complete the picture > >> you > > >> > > >> have to add the sizes of the lines. > > >> > > >> > > >> > > >> However, why do you want to keep track of the actual memory used by > > >> > > >> variables in your script? You should instead concentrate on the algorithm, > > >> > > >> and as long as either the size of the dataset is manageable or you can > >> limit > > >> > > >> the amount of data accessed at a given time you are golden. > > > > > > As I said, I need to merge large files and I cannot afford more I/O > > operations. So in order to minimise the I/O operation I am writing in > > chunks. Also, I need to use the merged files as indexes later which should > > be loaded in the memory for fast access. Hence the concern. > > > > > > Can you please elaborate on the point of taking lines into consideration? > > > > > > > Please don't doublespace your quotes. If you must use > > googlegroups, fix its bugs before posting. > > > > There's usually no net gain in trying to 'chunk' your output to a > > text file. The python file system already knows how to do that > > for a sequential file. > > > > For list of strings just add the getsizeof for the list to the sum > > of the getsizeof of all the list items. > > > > -- > > DaveA Hey! I need to chunk out the outputs otherwise it will give Memory Error. I need to do some postprocessing on the data read from the file too. If I donot stop before memory error, I won't be able to perform any more operations on it. -- https://mail.python.org/mailman/listinfo/python-list
Re: Finding size of Variable
On Tuesday, February 4, 2014 6:23:19 PM UTC+5:30, Asaf Las wrote: > On Tuesday, February 4, 2014 2:43:21 PM UTC+2, Ayushi Dalmia wrote: > > > > > > As I said, I need to merge large files and I cannot afford more I/O > > > operations. So in order to minimise the I/O operation I am writing in > > > chunks. Also, I need to use the merged files as indexes later which > > > should be loaded in the memory for fast access. Hence the concern. > > > Can you please elaborate on the point of taking lines into consideration? > > > > have you tried os.sendfile()? > > > > http://docs.python.org/dev/library/os.html#os.sendfile os.sendfile will not serve my purpose. I not only need to merge files, but do it in a sorted way. Thus some postprocessing is needed. -- https://mail.python.org/mailman/listinfo/python-list
RapydBox
Hello, For those of you who are interested by tools like NodeBox or Processing. you can give a try to RapydScript here : https://github.com/artyprog/RapydBox Regards -- https://mail.python.org/mailman/listinfo/python-list
Re: Logging data from Arduino using PySerial
On 2014-02-04 04:07, Thomas wrote:
I've written a script to log data from my Arduino to a csv file. The script
works well enough but it's very, very slow. I'm quite new to Python and I just
wanted to put this out there to see if any Python experts could help optimise
my code. Here it is:
[snip]
# Cleaning the data_log and storing it in data.csv
with open('data.csv','wb') as csvfile:
for line in data_log:
line_data = re.findall('\d*\.\d*',line) # Find all digits
line_data = filter(None,line_data)# Filter out empty strings
line_data = [float(x) for x in line_data] # Convert Strings to
float
for i in range(1,len(line_data)):
line_data[i]=map(line_data[i],0,1023,0,5)
You're doing this for every in line the log:
csvwrite = csv.writer(csvfile)
[snip]
Try moving before the 'for' loop so it's done only once.
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Re: [OT] Usage of U+00B6 PILCROW SIGN (was: generator slides review and Python doc (+/- text bug))
On Tue, Feb 4, 2014 at 1:51 AM, wrote: > I got it. If I'm visiting a page like this: > > http://docs.python.org/3/tutorial/index.html#the-python-tutorial > > 1) To read the page, I'm scrolling down. > 2) When I have finished to read the page, I scroll up > (or scroll back/up) to the top of the page until I see > this "feature" and the title. > 3) I click on this "feature". > 4) The title, already visible, moves, let's say, "2cm" higher. > > ...? Those links aren't for navigation. They're so you can discover anchor links in the page and pass them to someone else. For instance, if I want to point someone to the section of the tutorial that talks about reading and writing files, I could just give them this link: http://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files, instead of pointing them to the main page and instructing them to scroll down until they see Section 7.2 I was able to discover that link by opening the page, highlighting the section header with my mouse, then clicking the pilcrow. That gives me the anchor link to that section header. -- https://mail.python.org/mailman/listinfo/python-list
Re: Advice needed for Python packaging - can't find required library during installation
Thank you very much! :-)
On Monday, February 3, 2014 11:30:00 PM UTC-8, dieter wrote:
> thebiggestbangthe...@gmail.com writes:
>
>
>
> > I am trying to package up a very simple python app. In my setup.py file I
> > have a couple of lines that include the following:
>
> >
>
> > from setuptools import setup
>
> >
>
> > setup(
>
> > name='ban',
>
> > version='0.1',
>
> > packages=['ban',],
>
> > description='Python Distribution Utilities',
>
> > author='Ban',
>
> > author_email='b...@tbbt.com',
>
> > package_data={'ban': ['data/*.dat']},
>
> > long_description=open('README.txt').read(),
>
> > install_requires=['Google-Safe-Browsing-v2-Lookup'],
>
> > )
>
> > ...
>
> > Processing dependencies for ban==0.1
>
> > Searching for Google-Safe-Browsing-v2-Lookup
>
> > Reading http://pypi.python.org/simple/Google-Safe-Browsing-v2-Lookup/
>
> > No local packages or download links found for Google-Safe-Browsing-v2-Lookup
>
> > error: Could not find suitable distribution for
> > Requirement.parse('Google-Safe-Browsing-v2-Lookup')
>
> > **
>
> >
>
> > Issue #1
>
> >
>
> > Apparently the setup script cannot find the package -
> > Google-Safe-Browsing-v2-Lookup . However, I can install this package via
> > pip.
>
> >
>
> > What should I specify in the setup.py file instead of
> > install_requires=['Google-Safe-Browsing-v2-Lookup'] so that the library is
> > properly installed ?
>
>
>
> I suppose that "setuptools" is confused by the "-" in the package
>
> names together with these "-" being omitted in the uploaded file
>
> (https://pypi.python.org/packages/source/G/Google-Safe-Browsing-v2-Lookup/Google%20Safe%20Browsing%20v2%20Lookup-0.1.0.tar.gz5";).
>
>
>
> If this supposition is correct, then you would either need to
>
> contact the "setuptools" author (to get "setuptools" handle this case)
>
> or the "Google Safe Browsing" author to get a filename more
>
> in line with the package name.
--
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Re: [OT] Usage of U+00B6 PILCROW SIGN (was: generator slides review and Python doc (+/- text bug))
Le mardi 4 février 2014 15:39:54 UTC+1, Jerry Hill a écrit : > On Tue, Feb 4, 2014 at 1:51 AM, wrote: > > > I got it. If I'm visiting a page like this: > > > > > > http://docs.python.org/3/tutorial/index.html#the-python-tutorial > > > > > > 1) To read the page, I'm scrolling down. > > > 2) When I have finished to read the page, I scroll up > > > (or scroll back/up) to the top of the page until I see > > > this "feature" and the title. > > > 3) I click on this "feature". > > > 4) The title, already visible, moves, let's say, "2cm" higher. > > > > > > ...? > > > > Those links aren't for navigation. > > > > They're so you can discover anchor links in the page and pass them to > > someone else. For instance, if I want to point someone to the section > > of the tutorial that talks about reading and writing files, I could > > just give them this link: > > http://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files, > > instead of pointing them to the main page and instructing them to > > scroll down until they see Section 7.2 > > > > I was able to discover that link by opening the page, highlighting the > > section header with my mouse, then clicking the pilcrow. That gives > > me the anchor link to that section header. Useless and really ugly. -- https://mail.python.org/mailman/listinfo/python-list
Re: [OT] Usage of U+00B6 PILCROW SIGN
On 02/04/2014 08:21 AM, wxjmfa...@gmail.com wrote: > > Useless and really ugly. How do you recommend we discover the anchor links for linking to? -- https://mail.python.org/mailman/listinfo/python-list
Re: Calculator Problem
On Sunday, February 2, 2014 4:16:44 PM UTC-5, Charlie Winn wrote:
> Hey Guys i Need Help , When i run this program i get the 'None' Under the
> program, see what i mean by just running it , can someone help me fix this
>
>
>
> def Addition():
>
> print('Addition: What are two your numbers?')
>
> 1 = float(input('First Number:'))
>
> 2 = float(input('Second Number:'))
>
> print('Your Final Result is:', 1 + 2)
>
>
>
>
>
> def Subtraction():
>
> print('Subtraction: What are two your numbers?')
>
> 3 = float(input('First Number:'))
>
> 4 = float(input('Second Number:'))
>
> print('Your Final Result is:', 3 - 4)
>
>
>
>
>
> def Multiplication():
>
> print('Multiplication: What are two your numbers?')
>
> 5 = float(input('First Number:'))
>
> 6 = float(input('Second Number:'))
>
> print('Your Final Result is:', 5 * 6)
>
>
>
>
>
> def Division():
>
> print('Division: What are your two numbers?')
>
> 7 = float(input('First Number:'))
>
> 8 = float(input('Second Number:'))
>
> print('Your Final Result is:', 7 / 8)
>
>
>
>
>
>
>
> print('What type of calculation would you like to do?')
>
> Question = input('(Add, Subtract, Divide or Multiply)')
>
> if Question.lower().startswith('a'):
>
> print(Addition())
>
> elif Question.lower().startswith('s'):
>
> print(Subtraction())
>
> elif Question.lower().startswith('d'):
>
> print(Division())
>
> elif Question.lower().startswith('m'):
>
> print(Multiplication())
>
> else:
>
> print('Please Enter The First Letter Of The Type Of Calculation You
> Would Like To Use')
>
>
>
> while Question == 'test':
>
> Question()
Can anyone point out how using an int as a var is possible, unless it's
something I miss that changed in 3.3 from 3.2:
david@david:~$ python3.2
Python 3.2.3 (default, Sep 25 2013, 18:25:56)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 7 = float(input('First Number:'))
File "", line 1
SyntaxError: can't assign to literal
>>>
david@david:~$ python
Python 2.7.3 (default, Sep 26 2013, 20:08:41)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 7 = float(input('First Number:'))
File "", line 1
SyntaxError: can't assign to literal
>>>
--
https://mail.python.org/mailman/listinfo/python-list
Re: Calculator Problem
Missed that it's already pointed out, was looking at the google groups
combined email.
On Tue, Feb 4, 2014 at 10:43 AM, David Hutto wrote:
> On Sunday, February 2, 2014 4:16:44 PM UTC-5, Charlie Winn wrote:
> > Hey Guys i Need Help , When i run this program i get the 'None' Under
> the program, see what i mean by just running it , can someone help me fix
> this
> >
> >
> >
> > def Addition():
> >
> > print('Addition: What are two your numbers?')
> >
> > 1 = float(input('First Number:'))
> >
> > 2 = float(input('Second Number:'))
> >
> > print('Your Final Result is:', 1 + 2)
> >
> >
> >
> >
> >
> > def Subtraction():
> >
> > print('Subtraction: What are two your numbers?')
> >
> > 3 = float(input('First Number:'))
> >
> > 4 = float(input('Second Number:'))
> >
> > print('Your Final Result is:', 3 - 4)
> >
> >
> >
> >
> >
> > def Multiplication():
> >
> > print('Multiplication: What are two your numbers?')
> >
> > 5 = float(input('First Number:'))
> >
> > 6 = float(input('Second Number:'))
> >
> > print('Your Final Result is:', 5 * 6)
> >
> >
> >
> >
> >
> > def Division():
> >
> > print('Division: What are your two numbers?')
> >
> > 7 = float(input('First Number:'))
> >
> > 8 = float(input('Second Number:'))
> >
> > print('Your Final Result is:', 7 / 8)
> >
> >
> >
> >
> >
> >
> >
> > print('What type of calculation would you like to do?')
> >
> > Question = input('(Add, Subtract, Divide or Multiply)')
> >
> > if Question.lower().startswith('a'):
> >
> > print(Addition())
> >
> > elif Question.lower().startswith('s'):
> >
> > print(Subtraction())
> >
> > elif Question.lower().startswith('d'):
> >
> > print(Division())
> >
> > elif Question.lower().startswith('m'):
> >
> > print(Multiplication())
> >
> > else:
> >
> > print('Please Enter The First Letter Of The Type Of Calculation
> You Would Like To Use')
> >
> >
> >
> > while Question == 'test':
> >
> > Question()
>
> Can anyone point out how using an int as a var is possible, unless it's
> something I miss that changed in 3.3 from 3.2:
>
> david@david:~$ python3.2
> Python 3.2.3 (default, Sep 25 2013, 18:25:56)
> [GCC 4.6.3] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> 7 = float(input('First Number:'))
> File "", line 1
> SyntaxError: can't assign to literal
> >>>
>
> david@david:~$ python
> Python 2.7.3 (default, Sep 26 2013, 20:08:41)
> [GCC 4.6.3] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> 7 = float(input('First Number:'))
> File "", line 1
> SyntaxError: can't assign to literal
> >>>
>
> --
> https://mail.python.org/mailman/listinfo/python-list
>
--
Best Regards,
David Hutto
*CEO:* *http://www.hitwebdevelopment.com *
--
https://mail.python.org/mailman/listinfo/python-list
Latest Python 3.4 in the source repo is broken?
Before I bother Python-Dev with this, can anyone else confirm that building Python 3.4 from source using the latest version in the source repository fails? # Get the source code hg clone http://hg.python.org/cpython # Build Python (on Unix, sorry Windows and Mac people, you're on your own) ./configure --with-pydebug && make -j2 I get the following errors: libpython3.4dm.a(pythonrun.o): In function `_Py_InitializeEx_Private': /home/steve/python/cpython/Python/pythonrun.c:459: undefined reference to `_PyTraceMalloc_Init' libpython3.4dm.a(pythonrun.o): In function `Py_Finalize': /home/steve/python/cpython/Python/pythonrun.c:648: undefined reference to `_PyTraceMalloc_Fini' collect2: ld returned 1 exit status make: *** [Modules/_testembed] Error 1 Thanks in advance, -- Steven -- https://mail.python.org/mailman/listinfo/python-list
Re: Latest Python 3.4 in the source repo is broken?
On Tue, Feb 4, 2014 at 9:45 AM, Steven D'Aprano wrote: > Before I bother Python-Dev with this, can anyone else confirm that > building Python 3.4 from source using the latest version in the source > repository fails? > > # Get the source code > hg clone http://hg.python.org/cpython > > # Build Python (on Unix, sorry Windows and Mac people, you're on your own) > ./configure --with-pydebug && make -j2 > > > > I get the following errors: > > libpython3.4dm.a(pythonrun.o): In function `_Py_InitializeEx_Private': > /home/steve/python/cpython/Python/pythonrun.c:459: undefined reference to > `_PyTraceMalloc_Init' > libpython3.4dm.a(pythonrun.o): In function `Py_Finalize': > /home/steve/python/cpython/Python/pythonrun.c:648: undefined reference to > `_PyTraceMalloc_Fini' > collect2: ld returned 1 exit status > make: *** [Modules/_testembed] Error 1 The buildbots[1] don't seem to agree, and it builds fine for me on Windows. In order of destructiveness, try these: make Without -j2, see if there's a race somewhere. make distclean Clear out nearly all generated files. hg purge --all Clear out everything that's not checked in (this includes untracked and ignored files). You may need to enable the purge extension, `hg --config extensions.purge= purge --all` And I would suggest checking the output of `hg purge --all -p` before you do it to make sure you're not obliterating anything you want to keep. hg up null && hg purge --all && hg up default Rebuild the repository from scratch (without a full clone). [1] http://buildbot.python.org/all/waterfall?category=3.x.stable -- Zach -- https://mail.python.org/mailman/listinfo/python-list
Re: [OT] Usage of U+00B6 PILCROW SIGN
On Wed, Feb 5, 2014 at 2:31 AM, Michael Torrie wrote: > On 02/04/2014 08:21 AM, wxjmfa...@gmail.com wrote: >> >> Useless and really ugly. > > How do you recommend we discover the anchor links for linking to? Same way you usually do! By right clicking, hitting "View Source", and poking around until you find the right place! I've done exactly that with innumerable web sites. It's a massive luxury to have them explicitly published like that; as well as the convenience, it gives an impression (whether that's true or false) that the hash links are deemed important and will therefore be maintained in the future (unlike, say, a system that has "http:///#s4"; for the fourth (or fifth) section - inserting a section above this one will break my link) ChrisA . -- https://mail.python.org/mailman/listinfo/python-list
Re: Latest Python 3.4 in the source repo is broken?
On 04 Feb 2014 15:45:46 GMT Steven D'Aprano wrote: > Before I bother Python-Dev with this, can anyone else confirm that > building Python 3.4 from source using the latest version in the source > repository fails? I can not confirm an error. I checked out the latest sources and ./configure and make executed without any error using exactly your parameters. > Thanks in advance, You are welcome... ;) Regards, Johannes -- https://mail.python.org/mailman/listinfo/python-list
Re: Latest Python 3.4 in the source repo is broken?
On Wed, Feb 5, 2014 at 3:02 AM, Zachary Ware wrote: > On Tue, Feb 4, 2014 at 9:45 AM, Steven D'Aprano > wrote: >> Before I bother Python-Dev with this, can anyone else confirm that >> building Python 3.4 from source using the latest version in the source >> repository fails? >> >> # Build Python (on Unix, sorry Windows and Mac people, you're on your own) >> ./configure --with-pydebug && make -j2 >> > The buildbots[1] don't seem to agree, and it builds fine for me on > Windows. In order of destructiveness, try these: > > [1] http://buildbot.python.org/all/waterfall?category=3.x.stable Are there any buildbots that configure --with-pydebug? This could be a debug-only issue. That said, though, I just did a build without -j2 (on Linux - Debian Wheezy amd64) and it worked fine. Doing another one with -j2 didn't show up any errors either, but if it is a -j problem, then as Zachary says, it could be a race. What commit hash were you building from? It might have been broken and then fixed shortly, and you got into that tiny window. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Latest Python 3.4 in the source repo is broken?
On Tue, Feb 4, 2014 at 10:49 AM, Chris Angelico wrote: > Are there any buildbots that configure --with-pydebug? This could be a > debug-only issue. Only all of them :). As far as I know, the only 'bot that does a non-debug build is the "x86 Gentoo Non-Debug" bot. > That said, though, I just did a build without -j2 (on Linux - Debian > Wheezy amd64) and it worked fine. Doing another one with -j2 didn't > show up any errors either, but if it is a -j problem, then as Zachary > says, it could be a race. > > What commit hash were you building from? It might have been broken and > then fixed shortly, and you got into that tiny window. There was a brief issue this morning, but it was in typeobject.c, not _testembed. See http://hg.python.org/cpython/rev/655d7a55c165 -- Zach -- https://mail.python.org/mailman/listinfo/python-list
Re: Latest Python 3.4 in the source repo is broken?
On Wed, Feb 5, 2014 at 3:58 AM, Zachary Ware wrote: > On Tue, Feb 4, 2014 at 10:49 AM, Chris Angelico wrote: >> Are there any buildbots that configure --with-pydebug? This could be a >> debug-only issue. > > Only all of them :). As far as I know, the only 'bot that does a > non-debug build is the "x86 Gentoo Non-Debug" bot. LOL! Okay. Yeah, I think that settles that part of the question! ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Latest Python 3.4 in the source repo is broken?
On 02/04/2014 07:45 AM, Steven D'Aprano wrote: Before I bother Python-Dev with this, can anyone else confirm that building Python 3.4 from source using the latest version in the source repository fails? This is the check-out I'm using: ethan@media:~/source/python/cpython$ hg parent rev:88961:7d0a4f89c6ce branch: default tag:tip user: Vinay Sajip date: 2014-02-04 16:42 + desc: Closes #20509: Merged documentation update from 3.3. These are the settings I always use to make sure I have no weird problems between check-outs: ethan@media:~/source/python/cpython$ make distclean && ./configure --with-pydebug && make -j3 .. .. .. Python build finished successfully! The necessary bits to build these optional modules were not found: _gdbm _lzma To find the necessary bits, look in setup.py in detect_modules() for the module's name. running build_scripts creating build/scripts-3.4 copying and adjusting /home/ethan/source/python/cpython/Tools/scripts/pydoc3 -> build/scripts-3.4 copying and adjusting /home/ethan/source/python/cpython/Tools/scripts/idle3 -> build/scripts-3.4 copying and adjusting /home/ethan/source/python/cpython/Tools/scripts/2to3 -> build/scripts-3.4 copying and adjusting /home/ethan/source/python/cpython/Tools/scripts/pyvenv -> build/scripts-3.4 changing mode of build/scripts-3.4/pydoc3 from 664 to 775 changing mode of build/scripts-3.4/idle3 from 664 to 775 changing mode of build/scripts-3.4/2to3 from 664 to 775 changing mode of build/scripts-3.4/pyvenv from 664 to 775 renaming build/scripts-3.4/pydoc3 to build/scripts-3.4/pydoc3.4 renaming build/scripts-3.4/idle3 to build/scripts-3.4/idle3.4 renaming build/scripts-3.4/2to3 to build/scripts-3.4/2to3-3.4 renaming build/scripts-3.4/pyvenv to build/scripts-3.4/pyvenv-3.4 Hope this helps. -- ~Ethan~ -- https://mail.python.org/mailman/listinfo/python-list
Re: [OT] Usage of U+00B6 PILCROW SIGN
On 2/4/14 10:21 AM, wxjmfa...@gmail.com wrote: > >I was able to discover that link by opening the page, highlighting the >section header with my mouse, then clicking the pilcrow. That gives >me the anchor link to that section header. > Useless and really ugly. I'm not sure why you would describe it as useless? It's incredibly useful to have a way to link to a particular section. And ugly? It's a UI that is invisible and unobtrusive, but then elegant once you hover over the element you are interested in. I guess tastes differ... Lots of sites use this technique, it is not particular to the Python docs. -- Ned Batchelder, http://nedbatchelder.com -- https://mail.python.org/mailman/listinfo/python-list
Re: [OT] Usage of U+00B6 PILCROW SIGN
In article , Michael Torrie wrote: > On 02/04/2014 08:21 AM, wxjmfa...@gmail.com wrote: > > > > Useless and really ugly. > > How do you recommend we discover the anchor links for linking to? Use the Table Of Contents panel on the left? -- Jim Gibson -- https://mail.python.org/mailman/listinfo/python-list
Re: [OT] Usage of U+00B6 PILCROW SIGN
Michael Torrie wrote: > On 02/04/2014 08:21 AM, wxjmfa...@gmail.com wrote: >> >> Useless and really ugly. > > How do you recommend we discover the anchor links for linking to? Why not the whole header? Click anywhere on 7.2.1. Regular Expression Syntax instead of the tiny ¶ symbol beside it. -- https://mail.python.org/mailman/listinfo/python-list
Re: [OT] Usage of U+00B6 PILCROW SIGN (was: generator slides review and Python doc (+/- text bug))
2014-02-04 : > Le mardi 4 février 2014 15:39:54 UTC+1, Jerry Hill a écrit : > > Useless and really ugly. > I think this whole discussion is rather useless instead, why do you care since you're not going to use this tool anyway? -- https://mail.python.org/mailman/listinfo/python-list
Re:Finding size of Variable
Ayushi Dalmia Wrote in message: > > Where am I going wrong? What are the alternatives I can try? You've rejected all the alternatives so far without showing your code, or even properly specifying your problem. To get the "total" size of a list of strings, try (untested): a = sys.getsizeof (mylist ) for item in mylist: a += sys.getsizeof (item) This can be high if some of the strings are interned and get counted twice. But you're not likely to get closer without some knowledge of the data objects and where they come from. -- DaveA -- https://mail.python.org/mailman/listinfo/python-list
Re: Finding size of Variable
On 2014-02-04 14:21, Dave Angel wrote: > To get the "total" size of a list of strings, try (untested): > > a = sys.getsizeof (mylist ) > for item in mylist: > a += sys.getsizeof (item) I always find this sort of accumulation weird (well, at least in Python; it's the *only* way in many other languages) and would write it as a = getsizeof(mylist) + sum(getsizeof(item) for item in mylist) -tkc -- https://mail.python.org/mailman/listinfo/python-list
Re: Finding size of Variable
On 04/02/2014 19:21, Dave Angel wrote: Ayushi Dalmia Wrote in message: Where am I going wrong? What are the alternatives I can try? You've rejected all the alternatives so far without showing your code, or even properly specifying your problem. To get the "total" size of a list of strings, try (untested): a = sys.getsizeof (mylist ) for item in mylist: a += sys.getsizeof (item) The documentation for sys.getsizeof: http://docs.python.org/dev/library/sys#sys.getsizeof warns about the limitations of this function when applied to a container, and even points to a recipe by Raymond Hettinger which attempts to do a more complete job. TJG -- https://mail.python.org/mailman/listinfo/python-list
kivy
i installed python 2.7 before and installed suitable kivy.. i have also included the .bat file in the send to option.. but my programs are not at all runnning and giving me error when i run it normally or with the .bat file.. it says that there's no module named kivy when i import it.. please help im just frustrated after writing a long code and seeing that it isn't working.. if anyone has suggestions on how to develop android 2d games with python their reply would be greatly appreciated. thank you -- https://mail.python.org/mailman/listinfo/python-list
Re: kivy
On 2014-02-04 19:55, bharath wrote: i installed python 2.7 before and installed suitable kivy.. i have also included the .bat file in the send to option.. but my programs are not at all runnning and giving me error when i run it normally or with the .bat file.. it says that there's no module named kivy when i import it.. please help im just frustrated after writing a long code and seeing that it isn't working.. if anyone has suggestions on how to develop android 2d games with python their reply would be greatly appreciated. thank you Is kivy listed in the Python search paths (sys.path)? -- https://mail.python.org/mailman/listinfo/python-list
Re: kivy
On Wednesday, February 5, 2014 1:51:31 AM UTC+5:30, MRAB wrote: > On 2014-02-04 19:55, bharath wrote: > > > i installed python 2.7 before and installed suitable kivy.. i have > > > also included the .bat file in the send to option.. but my programs > > > are not at all runnning and giving me error when i run it normally or > > > with the .bat file.. it says that there's no module named kivy when i > > > import it.. please help im just frustrated after writing a long code > > > and seeing that it isn't working.. if anyone has suggestions on how > > > to develop android 2d games with python their reply would be greatly > > > appreciated. thank you > > > > > Is kivy listed in the Python search paths (sys.path)? -- https://mail.python.org/mailman/listinfo/python-list
Re: kivy
On Wednesday, February 5, 2014 1:51:31 AM UTC+5:30, MRAB wrote: > On 2014-02-04 19:55, bharath wrote: > > > i installed python 2.7 before and installed suitable kivy.. i have > > > also included the .bat file in the send to option.. but my programs > > > are not at all runnning and giving me error when i run it normally or > > > with the .bat file.. it says that there's no module named kivy when i > > > import it.. please help im just frustrated after writing a long code > > > and seeing that it isn't working.. if anyone has suggestions on how > > > to develop android 2d games with python their reply would be greatly > > > appreciated. thank you > > > > > Is kivy listed in the Python search paths (sys.path)? yes -- https://mail.python.org/mailman/listinfo/python-list
Re: kivy
On 02/04/2014 11:55 AM, bharath wrote: i installed python 2.7 before and installed suitable kivy.. i have also included the .bat file in the send to option.. but my programs are not at all runnning and giving me error when i run it normally or with the .bat file.. it says that there's no module named kivy when i import it.. please help im just frustrated after writing a long code and seeing that it isn't working.. if anyone has suggestions on how to develop android 2d games with python their reply would be greatly appreciated. thank you This is a Python newsgroup. You might find an answer here, but I think you'd have much better luck if you found a kivy specific newsgroup. Good luck, Gary Herron -- https://mail.python.org/mailman/listinfo/python-list
RE: kivy
>> Is kivy listed in the Python search paths (sys.path)? >yes To be extra sure, you can start a python interpreter with the commandline argument -vv, and when you try to import kivy (or any module) it will show you every file/path it checks when trying to find it. This might help you narrow down where the problem lies. -Nick Cash -- https://mail.python.org/mailman/listinfo/python-list
Re: kivy
On Wednesday, February 5, 2014 2:03:58 AM UTC+5:30, Nick Cash wrote: > >> Is kivy listed in the Python search paths (sys.path)? > > > > >yes > > > > To be extra sure, you can start a python interpreter with the commandline > argument -vv, and when you try to import kivy (or any module) it will show > you every file/path it checks when trying to find it. This might help you > narrow down where the problem lies. > > > > -Nick Cash thanks nick that helped. i actually cant express this feeling of gratitude.. thank you very much.this is a wonderful group.. -- https://mail.python.org/mailman/listinfo/python-list
Re: Calculator Problem
On Sunday, February 2, 2014 4:16:44 PM UTC-5, Charlie Winn wrote:
> Hey Guys i Need Help , When i run this program i get the 'None' Under the
> program, see what i mean by just running it , can someone help me fix this
>
>
>
> def Addition():
>
> print('Addition: What are two your numbers?')
>
> 1 = float(input('First Number:'))
>
> 2 = float(input('Second Number:'))
>
> print('Your Final Result is:', 1 + 2)
>
>
>
>
>
> def Subtraction():
>
> print('Subtraction: What are two your numbers?')
>
> 3 = float(input('First Number:'))
>
> 4 = float(input('Second Number:'))
>
> print('Your Final Result is:', 3 - 4)
>
>
>
>
>
> def Multiplication():
>
> print('Multiplication: What are two your numbers?')
>
> 5 = float(input('First Number:'))
>
> 6 = float(input('Second Number:'))
>
> print('Your Final Result is:', 5 * 6)
>
>
>
>
>
> def Division():
>
> print('Division: What are your two numbers?')
>
> 7 = float(input('First Number:'))
>
> 8 = float(input('Second Number:'))
>
> print('Your Final Result is:', 7 / 8)
>
>
>
>
>
>
>
> print('What type of calculation would you like to do?')
>
> Question = input('(Add, Subtract, Divide or Multiply)')
>
> if Question.lower().startswith('a'):
>
> print(Addition())
>
> elif Question.lower().startswith('s'):
>
> print(Subtraction())
>
> elif Question.lower().startswith('d'):
>
> print(Division())
>
> elif Question.lower().startswith('m'):
>
> print(Multiplication())
>
> else:
>
> print('Please Enter The First Letter Of The Type Of Calculation You
> Would Like To Use')
>
>
>
> while Question == 'test':
>
> Question()
I don't know why people bother trying to help you, when it is YOU that has a
*** rude attitude.
You are asking the wrong question to begin with because the posted code could
have NEVER given you the stated output.
Most of us here are noobs and those that are not, were noobs once; so we all
can deal with noobs, but none should have to deal with a***holes.
--
https://mail.python.org/mailman/listinfo/python-list
Re: [OT] Usage of U+00B6 PILCROW SIGN
On 2/4/2014 1:20 PM, Ned Batchelder wrote: On 2/4/14 10:21 AM, wxjmfa...@gmail.com wrote: > >I was able to discover that link by opening the page, highlighting the >section header with my mouse, then clicking the pilcrow. That gives >me the anchor link to that section header. > Useless and really ugly. I'm not sure why you would describe it as useless? Because, as we should all know by now, when Jim says 'useless', he means 'useless to me, according to my unusual notions of personal usefulness'. He, apparently, does not intend to ever use the pilcrow to get a section link, nor does he care about being able to click on such links presented by others. It's incredibly useful to have a way to link to a particular section. For many people, but not for Jim. Either he does not care about usefulness to others, or he is completely oblivious to how idiosyncratic his personal idea of usefulness is. In either case, it is useless to argue against his personal opinion. He should, however, add 'to me' since most people take 'useless' in the collective sense. And ugly? It's a UI that is invisible and unobtrusive, but then elegant once you hover over the element you are interested in. Having it pop up and disappear when one does not want it and will not use it is not pretty. When scrolling with a mouse wheel, that does happen. I guess tastes differ... Lots of sites use this technique, it is not particular to the Python docs. Irrelevant to Jim. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: [OT] Usage of U+00B6 PILCROW SIGN
On 2/4/2014 10:21 AM, wxjmfa...@gmail.com wrote: I was able to discover that link by opening the page, highlighting the section header with my mouse, then clicking the pilcrow. That gives me the anchor link to that section header. Useless and really ugly. Jim, when you say 'useless', please qualify as 'useless to me'. Otherwise, people may think that you mean 'useless to eveyone', and it is disrespectful to mislead people that way. I hope you are aware that your personal ideas of usefulness to yourself are quite different from other peoples' ideas of usefulness to themselves. I now understand that you consider the FSR useless *to you* because you do not care about the bugginess of narrow builds or about the spacious of wide builds. You do care about uniformity of character size across all strings, and FSR lacks that. You are entitled to make that judgment for yourself. You are not entitled to sabotage others by projecting you personal judgments onto others. The FSR and pilcrow are definitely useful to other people as they judge personal usefulness for themselves. PS. I agree that the pilcrow appearing and disappearing is not pretty when I am not looking to use it. I happen to think that is it tolerable because it is sometimes useful. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: [OT] Usage of U+00B6 PILCROW SIGN
On 2/4/2014 2:19 PM, andrea crotti wrote: 2014-02-04 : Useless and really ugly. I think this whole discussion is rather useless. I agree that responding to Jim's generalized statements such as 'useless' are either sincere personal opinions that are true with respect to himself, delusional statements that are false with respect to the community at large, or intentionally false trolls. I really cannot tell. In any case, I agree that response is pretty useless. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: [OT] Usage of U+00B6 PILCROW SIGN
On 2/4/2014 6:24 PM, Terry Reedy wrote: On 2/4/2014 2:19 PM, andrea crotti wrote: 2014-02-04 : Useless and really ugly. I think this whole discussion is rather useless. I agree that responding to Jim's generalized statements such as 'useless' are either sincere personal opinions that are true with respect to himself, delusional statements that are false with respect to the community at large, or intentionally false trolls. I really cannot tell. In any case, I agree that response is pretty useless. Please ignore garbled post as I hit send in mid composition while revising. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: [OT] Usage of U+00B6 PILCROW SIGN
On Wed, Feb 5, 2014 at 10:18 AM, Terry Reedy wrote: > PS. I agree that the pilcrow appearing and disappearing is not pretty when I > am not looking to use it. I happen to think that is it tolerable because it > is sometimes useful. Yes, it's not perfect. But neither are the obvious alternatives: * Keeping the symbol there permanently looks weird, and also raises the question of whether or not it should be copied to the clipboard if you select a whole pile of content. (If it is, you get an ugly bit of junk in your text, something that now (being unclickable) has no meaning. If it isn't, why isn't it? It's clearly part of the text!) * Making the whole heading clickable is a bit weird in terms of UI. It makes this text a link to itself, where it looks like it could be a link to somewhere else. I've seen other sites where headings are all links back to their ToC entries (ie the top of the page, or close to), which is also weird, and the fact that it could be either means that people won't know they can click on the heading to get a link to that section. * Having nothing on the section itself does work, but it means that finding a section link requires you to go back up to the top of the page, figure out which Contents entry is the section you want, and click on it. That's how I get section links from a MediaWiki site (eg Wikipedia); yes, it's workable, but it would be nicer to have the link down at the section I'm reading. * Putting a fixed-position piece of text showing the current section is way too intrusive. I've seen sites with that, and I'm sure it's useful, but I'd really prefer something a lot more subtle. All of the above are plausible, but none is perfect. So what do you do? You go with something imperfect and cope with a few issues. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Concepts and Applications of Finite Element Analysis (4th Ed., Cook, Malkus, Plesha & Witt)
On 2/4/14 6:24 PM, yamas wrote: On Sun, 02 Feb 2014 17:59:29 -0600, kalvinmanual3 wrote: I have solutions manuals to all problems and exercises in these textbooks. To get one in an electronic format contact me at fuck off retard No matter what you think of the inappropriate post about manuals, this kind of response is completely unacceptable. Please don't do it again. Please read this: http://www.python.org/psf/codeofconduct -- Ned Batchelder, http://nedbatchelder.com -- https://mail.python.org/mailman/listinfo/python-list
Re: Calculator Problem
In article , David Hutto wrote: > Can anyone point out how using an int as a var is possible one = 42 (ducking and running) -- https://mail.python.org/mailman/listinfo/python-list
Re: Calculator Problem
On Wed, Feb 5, 2014 at 11:53 AM, Roy Smith wrote: > In article , > David Hutto wrote: > >> Can anyone point out how using an int as a var is possible > > one = 42 > > (ducking and running) In theory, there might be a Unicode character that's valid as an identifier, but gets converted into U+0031 for ASCIIfication prior to being sent by email. However, I can't find one :) And of course, that assumes that the OP's mail client mangles its input in that way. ASCIIfication shouldn't be necessary. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Concepts and Applications of Finite Element Analysis (4th Ed., Cook, Malkus, Plesha & Witt)
On 2/4/2014 6:36 PM, Ned Batchelder wrote: On 2/4/14 6:24 PM, yamas wrote: On Sun, 02 Feb 2014 17:59:29 -0600, kalvinmanual3 wrote: Python-list (and gmane) readers do not see and hence never notice the spam that gets blocked -- about 90%. Since essentially identical messages have appeared before, probably from the same sender, I tweaked the settings a bit. The few spam messages that do make it to the list should almost always be ignored and not kept alive by responses. One would have to be ignorant and/or foolish to think that spammers read responses on any of the many lists they spam. So any response is directed at the non-spammer readers. Obnoxious responses like that above constitute trolling. No matter what you think of the inappropriate post about manuals, this kind of response is completely unacceptable. Please don't do it again. Please read this: http://www.python.org/psf/codeofconduct Please do, and follow it. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: Calculator Problem
On Tue, 04 Feb 2014 19:53:52 -0500, Roy Smith wrote: > In article , > David Hutto wrote: > >> Can anyone point out how using an int as a var is possible > > one = 42 > > (ducking and running) int = 42 (ducking lower and running faster) -- https://mail.python.org/mailman/listinfo/python-list
Re: kivy
On Wednesday, February 5, 2014 1:25:43 AM UTC+5:30, bharath wrote: > please help im just frustrated after writing a long code and seeing that it > isn't working.. Prior to Kernighan and Ritchie people did tend to write 'a long code' and then check that its working (or not). After 'The C programming language' -- which is about 40 years -- starting any programming enterprise without writing AND CHECKING the equivalent of "Hello World" is just never done. IOW you underestimate how many niggling details both of the system and of your understanding are checked by that approach -- https://mail.python.org/mailman/listinfo/python-list
Re: Finding size of Variable
On Tuesday, February 4, 2014 7:36:48 PM UTC+5:30, Dennis Lee Bieber wrote: > On Tue, 4 Feb 2014 05:19:48 -0800 (PST), Ayushi Dalmia > > declaimed the following: > > > > > > >I need to chunk out the outputs otherwise it will give Memory Error. I need > >to do some postprocessing on the data read from the file too. If I donot > >stop before memory error, I won't be able to perform any more operations on > >it. > > > > 10 200MB files is only 2GB... Most any 64-bit processor these days can > > handle that. Even some 32-bit systems could handle it (WinXP booted with > > the server option gives 3GB to user processes -- if the 4GB was installed > > in the machine). > > > > However, you speak of an n-way merge. The traditional merge operation > > only reads one record from each file at a time, examines them for "first", > > writes that "first", reads next record from the file "first" came from, and > > then reassesses the set. > > > > You mention needed to chunk the data -- that implies performing a merge > > sort in which you read a few records from each file into memory, sort them, > > and right them out to newFile1; then read the same number of records from > > each file, sort, and write them to newFile2, up to however many files you > > intend to work with -- at that point you go back and append the next chunk > > to newFile1. When done, each file contains chunks of n*r records. You now > > make newFilex the inputs, read/merge the records from those chunks > > outputting to another file1, when you reach the end of the first chunk in > > the files you then read/merge the second chunk into another file2. You > > repeat this process until you end up with only one chunk in one file. > > -- > > Wulfraed Dennis Lee Bieber AF6VN > > wlfr...@ix.netcom.comHTTP://wlfraed.home.netcom.com/ The way you mentioned for merging the file is an option but that will involve a lot of I/O operation. Also, I do not want the size of the file to increase beyond a certain point. When I reach the file size upto a certain limit, I want to start writing in a new file. This is because I want to store them in memory again later. -- https://mail.python.org/mailman/listinfo/python-list
Re: Finding size of Variable
On Wednesday, February 5, 2014 12:51:31 AM UTC+5:30, Dave Angel wrote:
> Ayushi Dalmia Wrote in message:
>
>
>
> >
>
> > Where am I going wrong? What are the alternatives I can try?
>
>
>
> You've rejected all the alternatives so far without showing your
>
> code, or even properly specifying your problem.
>
>
>
> To get the "total" size of a list of strings, try (untested):
>
>
>
> a = sys.getsizeof (mylist )
>
> for item in mylist:
>
> a += sys.getsizeof (item)
>
>
>
> This can be high if some of the strings are interned and get
>
> counted twice. But you're not likely to get closer without some
>
> knowledge of the data objects and where they come
>
> from.
>
>
>
> --
>
> DaveA
Hello Dave,
I just thought that saving others time is better and hence I explained only the
subset of my problem. Here is what I am trying to do:
I am trying to index the current wikipedia dump without using databases and
create a search engine for Wikipedia documents. Note, I CANNOT USE DATABASES.
My approach:
I am parsing the wikipedia pages using SAX Parser, and then, I am dumping the
words along with the posting list (a list of doc ids in which the word is
present) into different files after reading 'X' number of pages. Now these
files may have the same word and hence I need to merge them and write the final
index again. Now these final indexes must be of limited size as I need to be of
limited size. This is where I am stuck. I need to know how to determine the
size of content in a variable before I write into the file.
Here is the code for my merging:
def mergeFiles(pathOfFolder, countFile):
listOfWords={}
indexFile={}
topOfFile={}
flag=[0]*countFile
data=defaultdict(list)
heap=[]
countFinalFile=0
for i in xrange(countFile):
fileName = pathOfFolder+'\index'+str(i)+'.txt.bz2'
indexFile[i]= bz2.BZ2File(fileName, 'rb')
flag[i]=1
topOfFile[i]=indexFile[i].readline().strip()
listOfWords[i] = topOfFile[i].split(' ')
if listOfWords[i][0] not in heap:
heapq.heappush(heap, listOfWords[i][0])
while any(flag)==1:
temp = heapq.heappop(heap)
for i in xrange(countFile):
if flag[i]==1:
if listOfWords[i][0]==temp:
//This is where I am stuck. I cannot wait until memory
//error, as I need to do some postprocessing too.
try:
data[temp].extend(listOfWords[i][1:])
except MemoryError:
writeFinalIndex(data, countFinalFile, pathOfFolder)
data=defaultdict(list)
countFinalFile+=1
topOfFile[i]=indexFile[i].readline().strip()
if topOfFile[i]=='':
flag[i]=0
indexFile[i].close()
os.remove(pathOfFolder+'\index'+str(i)+'.txt.bz2')
else:
listOfWords[i] = topOfFile[i].split(' ')
if listOfWords[i][0] not in heap:
heapq.heappush(heap, listOfWords[i][0])
writeFinalIndex(data, countFinalFile, pathOfFolder)
countFile is the number of files and writeFileIndex method writes into the file.
--
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Re: Finding size of Variable
On Wednesday, February 5, 2014 12:59:46 AM UTC+5:30, Tim Chase wrote:
> On 2014-02-04 14:21, Dave Angel wrote:
>
> > To get the "total" size of a list of strings, try (untested):
>
> >
>
> > a = sys.getsizeof (mylist )
>
> > for item in mylist:
>
> > a += sys.getsizeof (item)
>
>
>
> I always find this sort of accumulation weird (well, at least in
>
> Python; it's the *only* way in many other languages) and would write
>
> it as
>
>
>
> a = getsizeof(mylist) + sum(getsizeof(item) for item in mylist)
>
>
>
> -tkc
This also doesn't gives the true size. I did the following:
import sys
data=[]
f=open('stopWords.txt','r')
for line in f:
line=line.split()
data.extend(line)
print sys.getsizeof(data)
where stopWords.txt is a file of size 4KB
--
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Re: Finding size of Variable
On Wednesday, February 5, 2014 11:05:05 AM UTC+5:30, Ayushi Dalmia wrote:
> This also doesn't gives the true size. I did the following:
> import sys
> data=[]
> f=open('stopWords.txt','r')
> for line in f:
> line=line.split()
> data.extend(line)
> print sys.getsizeof(data)
> where stopWords.txt is a file of size 4KB
Try getsizeof("".join(data))
General advice:
- You have been recommended (by Chris??) that you should use a database
- You say you cant use a database (for whatever reason)
Now the fact is you NEED database (functionality)
How to escape this catch-22 situation?
In computer science its called somewhat sardonically "Greenspun's 10th rule"
And the best way out is to
1 isolate those aspects of database functionality you need
2 temporarily forget about your original problem and implement the dbms
(subset of) DBMS functionality you need
3 Use 2 above to implement 1
--
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Re: Finding size of Variable
On Wednesday, February 5, 2014 11:15:09 AM UTC+5:30, Rustom Mody wrote:
> On Wednesday, February 5, 2014 11:05:05 AM UTC+5:30, Ayushi Dalmia wrote:
>
> > This also doesn't gives the true size. I did the following:
>
>
>
> > import sys
>
> > data=[]
>
> > f=open('stopWords.txt','r')
>
>
>
> > for line in f:
>
> > line=line.split()
>
> > data.extend(line)
>
>
>
> > print sys.getsizeof(data)
>
>
>
> > where stopWords.txt is a file of size 4KB
>
>
>
> Try getsizeof("".join(data))
>
>
>
> General advice:
>
> - You have been recommended (by Chris??) that you should use a database
>
> - You say you cant use a database (for whatever reason)
>
>
>
> Now the fact is you NEED database (functionality)
>
> How to escape this catch-22 situation?
>
> In computer science its called somewhat sardonically "Greenspun's 10th rule"
>
>
>
> And the best way out is to
>
>
>
> 1 isolate those aspects of database functionality you need
>
> 2 temporarily forget about your original problem and implement the dbms
>
> (subset of) DBMS functionality you need
>
> 3 Use 2 above to implement 1
Hello Rustum,
Thanks for the enlightenment. I did not know about the Greenspun's Tenth rule.
It is interesting to know that. However, it is an academic project and not a
research one. Hence I donot have the liberty to choose what to work with. Life
is easier with databases though, but I am not allowed to use them. Thanks for
the tip. I will try to replicate those functionality.
--
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