Re: Feeding the trolls
D'Arcy Cain writes: > One of these days I will have to figure out how to block replies to the > trolls as well. Benefit of reading the mailing list via nntp (i.e. gmane): can easily score down follow-ups to annoying people in addition to their posts. Well, assuming a decent newsreader. -- https://mail.python.org/mailman/listinfo/python-list
translating foreign data
I need to translate numeric data in a string format into a binary format. I know there are at least two different methods of representing parts less that 1, such as "10.5" and "10,5". The data is encoded using code pages, and can vary depending on the file being read (so I can't rely on current locale settings). I'm sure this is a solved problem, but I'm not finding those solutions. Any pointers? -- ~Ethan~ -- https://mail.python.org/mailman/listinfo/python-list
write the values of an ordered dictionary into a file
Hi Team
I need to write the values of an ordered dictionary into a file . All
values should be in a single row with a header list
*Example:*
*student = [("NAME", "John"),*
* ("AGE", 28),*
* ("SCORE", 13),*
* ("YEAR", 2018),*
* ("FEE", 250)]*
*student = OrderedDict(student)*
*The OrderedDict Should be append at the end of the file as as shown below.*
*# tail -2 /tmp/student_record.txt *
*.*
*||STUDENT NAME||STUDENT AGE||MARKS SCORED||PASSED YEAR||FEES PAID||*
*||John|| 28 || 13|| 2018 || 250 ||*
Questions:
(1) Below is my partial solution , any comments and suggestions ( I am not
to get the “||” delimiter correctly, trying it )
#!/usr/bin/python
# A Python program to write the values of an OderedDict into a file
# The values should be formatted correctly under its headers
from collections import OrderedDict
tmp = '/tmp/student_record.txt'
student = [("NAME", "John"),
("AGE", 28),
("SCORE", 13),
("YEAR", 2018),
("FEE", 250)]
student = OrderedDict(student)
header_list = ["STUDENT NAME", "STUDENT AGE", "MARKS SCORED", "PASSED YEAR",
"FEES PAID"]
header_string = '||' + '||'.join(header_list) + '||'
with open(tmp, 'a') as fd:
for item in header_string:
fd.write("%s" % (item))
for value in student.values():
fd.write("\n")
fd.write("||")
fd.write("%s" % (value))
*output:*
*root@X1:/Play_ground/SPECIAL_TYPES# cat /tmp/student_record.txt*
*||STUDENT NAME||STUDENT AGE||MARKS SCORED||PASSED YEAR||FEES PAID||*
*||John*
*||28*
*||13*
*||2018*
(2)Any alternative way to solve this easily and store the data in the
requested format (can I still use cvs writer to format this)
I am a Linux user with Python 2.7
Regards,
Ganesh
--
https://mail.python.org/mailman/listinfo/python-list
Re: write the values of an ordered dictionary into a file
On Thu, 21 Jun 2018 22:41:48 +0530, Ganesh Pal wrote:
[snip]
[what I think OP wants:]
>
> *.*
>
> *||STUDENT NAME||STUDENT AGE||MARKS SCORED||PASSED YEAR||FEES PAID||*
>
> *||John|| 28 || 13|| 2018 || 250 ||*
>
>
> Questions:
>
> (1) Below is my partial solution , any comments and suggestions ( I am not
> to get the “||” delimiter correctly, trying it )
>
> #!/usr/bin/python
> # A Python program to write the values of an OderedDict into a file
> # The values should be formatted correctly under its headers
>
> from collections import OrderedDict
>
> tmp = '/tmp/student_record.txt'
> student = [("NAME", "John"),
>("AGE", 28),
>("SCORE", 13),
>("YEAR", 2018),
>("FEE", 250)]
>
> student = OrderedDict(student)
> header_list = ["STUDENT NAME", "STUDENT AGE", "MARKS SCORED", "PASSED YEAR",
> "FEES PAID"]
>
> header_string = '||' + '||'.join(header_list) + '||'
> with open(tmp, 'a') as fd:
> for item in header_string:
> fd.write("%s" % (item))
>
> for value in student.values():
> fd.write("\n")
> fd.write("||")
> fd.write("%s" % (value))
>
> *output:*
> *root@X1:/Play_ground/SPECIAL_TYPES# cat /tmp/student_record.txt*
> *||STUDENT NAME||STUDENT AGE||MARKS SCORED||PASSED YEAR||FEES PAID||*
> *||John*
> *||28*
> *||13*
> *||2018*
[snip]
You don't say which aspects of this output you find unsatisfactory and
want help with, but . . .
- You're writing "\n" in front of every *field*, when you only want to
write it in front of every line; and
- To make the columns line up right, you'll want to specify the widths
of the character strings being written, e.g., using "%10s" in place
of "%s".
--
To email me, substitute nowhere->runbox, invalid->com.
--
https://mail.python.org/mailman/listinfo/python-list
Re: translating foreign data
On Thu, 21 Jun 2018 10:12:27 -0700, Ethan Furman wrote: > I need to translate numeric data in a string format into a binary > format. I know there are at least two different methods of > representing parts less that 1, such as "10.5" and "10,5". The data > is encoded using code pages, and can vary depending on the file being > read (so I can't rely on current locale settings). > > I'm sure this is a solved problem, but I'm not finding those > solutions. Any pointers? Do you also have to accommodate the possibility that one thousand might be written "1,000" or "1.000"? -- To email me, substitute nowhere->runbox, invalid->com. -- https://mail.python.org/mailman/listinfo/python-list
Re: write the values of an ordered dictionary into a file
On 2018-06-21 18:11, Ganesh Pal wrote:
> Hi Team
>
> I need to write the values of an ordered dictionary into a file . All
> values should be in a single row with a header list
>
> *Example:*
>
> *student = [("NAME", "John"),*
> * ("AGE", 28),*
> * ("SCORE", 13),*
> * ("YEAR", 2018),*
> * ("FEE", 250)]*
> *student = OrderedDict(student)*
>
> *The OrderedDict Should be append at the end of the file as as shown
below.*
>
> *# tail -2 /tmp/student_record.txt *
> *.*
> *||STUDENT NAME||STUDENT AGE||MARKS SCORED||PASSED YEAR||FEES PAID||*
> *||John|| 28 || 13|| 2018 || 250 ||*
>
>
> Questions:
>
> (1) Below is my partial solution , any comments and suggestions ( I
am not
> to get the “||” delimiter correctly, trying it )
>
> #!/usr/bin/python
>
> # A Python program to write the values of an OderedDict into a file
> # The values should be formatted correctly under its headers
>
> from collections import OrderedDict
> tmp = '/tmp/student_record.txt'
>
> student = [("NAME", "John"),
> ("AGE", 28),
> ("SCORE", 13),
> ("YEAR", 2018),
> ("FEE", 250)]
>
> student = OrderedDict(student)
>
> header_list = ["STUDENT NAME", "STUDENT AGE", "MARKS SCORED", "PASSED
YEAR",
> "FEES PAID"]
>
> header_string = '||' + '||'.join(header_list) + '||'
>
> with open(tmp, 'a') as fd:
header_string is already a string, so here you're just iterating over
the characters of that string:
> for item in header_string:
> fd.write("%s" % (item))
>
You can write it more simple like this:
fd.write("%s\n" % header_string)
Here you're writing a newline before each of the fields/columns:
> for value in student.values():
> fd.write("\n")
> fd.write("||")
> fd.write("%s" % (value))
>
>
> *output:*
>
> *root@X1:/Play_ground/SPECIAL_TYPES# cat /tmp/student_record.txt*
> *||STUDENT NAME||STUDENT AGE||MARKS SCORED||PASSED YEAR||FEES PAID||*
> *||John*
> *||28*
> *||13*
> *||2018*
>
>
> (2)Any alternative way to solve this easily and store the data in the
> requested format (can I still use cvs writer to format this)
>
>
> I am a Linux user with Python 2.7
>
What I would do is measure the widths of the each heading and of each
value and then pad them out to the longest:
header_list = ["STUDENT NAME", "STUDENT AGE", "MARKS SCORED", "PASSED
YEAR", "FEES PAID"]
header_widths = [len(header) for header in header_list]
value_list = [str(value) for value in student.values()]
value_widths = [len(value) for value in value_list]
column_widths = [max(header_width, value_width) for header_width,
value_width in zip(header_widths, value_widths)]
with open(tmp, 'a') as fd:
fd.write('||' + '||'.join(header.ljust(width) for header, width in
zip(header_list, column_widths)) + '||\n')
fd.write('||' + '||'.join(value.ljust(width) for value, width in
zip(value_list, column_widths)) + '||\n')
--
https://mail.python.org/mailman/listinfo/python-list
Re: write the values of an ordered dictionary into a file
Ganesh Pal wrote:
> Hi Team
There is no team, just some random guys on the net. Sorry to disappoint
you...
> I need to write the values of an ordered dictionary into a file . All
> values should be in a single row with a header list
>
>
>
> *Example:*
>
>
>
> *student = [("NAME", "John"),*
>
> * ("AGE", 28),*
>
> * ("SCORE", 13),*
>
> * ("YEAR", 2018),*
>
> * ("FEE", 250)]*
>
> *student = OrderedDict(student)*
>
>
>
> *The OrderedDict Should be append at the end of the file as as shown
> below.*
>
>
> *# tail -2 /tmp/student_record.txt *
>
> *.*
>
> *||STUDENT NAME||STUDENT AGE||MARKS SCORED||PASSED YEAR||FEES PAID||*
>
> *||John|| 28 || 13|| 2018 || 250 ||*
Here's one way, written in Python 3.
widths = [len(ch) for ch in header_list]
def print_row(values, widths=widths, file=None):
print(
"||",
"||".join("{:^{}}".format(v, w) for v, w in zip(values, widths)),
"||", sep="", file=file
)
print_row(header_list)
print_row(student.values())
In Python 2 it should work after
from __future__ import print_function
or by replacing print() with a few file.write() calls.
--
https://mail.python.org/mailman/listinfo/python-list
Re: syntax difference
On Wed, 20 Jun 2018 11:41:23 -0700, bart4858 wrote: > The actual interpreter code is irrelevant. Switch would be a feature of > the language being interpreted, not of the interpreter. > > If the task is to match an expression X against a variety of values, > then expressing that as a switch means the interpreter /could/ use a > jump table (of labels within the byte code), rather than execute a chain > of X==Y tests within byte code. So, evaluate X once then it could be a > single byte code op. > > At least, it will know that exactly the same X value is being tested. So > you evaluate it once then keep it on the stack. > > Think of Switch as another kind if hint. which can be implemented in python by putting function calls as members of a list or dictionary switch=[case1,case2,case3] switch[a]() (although i personally would still like to see a switch if anyone can come up with a suitable syntax that does not break the rest of the python philosophy wtr indentation.) -- There are more things in heaven and earth, Horatio, than are dreamt of in your philosophy. -- Wm. Shakespeare, "Hamlet" -- https://mail.python.org/mailman/listinfo/python-list
Re: translating foreign data
On Thursday, June 21, 2018 at 1:08:35 PM UTC-4, Ethan Furman wrote: > I need to translate numeric data in a string format into a binary format. I > know there are at least two different > methods of representing parts less that 1, such as "10.5" and "10,5". The > data is encoded using code pages, and can > vary depending on the file being read (so I can't rely on current locale > settings). > > I'm sure this is a solved problem, but I'm not finding those solutions. Any > pointers? > > -- > ~Ethan~ Try this StackOverflow answer: https://stackoverflow.com/a/17815252 Regards, Igor. -- https://mail.python.org/mailman/listinfo/python-list
Re: translating foreign data
On 06/21/2018 10:36 AM, Peter Pearson wrote: On Thu, 21 Jun 2018 10:12:27 -0700, Ethan Furman wrote: I need to translate numeric data in a string format into a binary format. I know there are at least two different methods of representing parts less that 1, such as "10.5" and "10,5". The data is encoded using code pages, and can vary depending on the file being read (so I can't rely on current locale settings). I'm sure this is a solved problem, but I'm not finding those solutions. Any pointers? Do you also have to accommodate the possibility that one thousand might be written "1,000" or "1.000"? Nope, just the decimal character. -- ~Ethan~ -- https://mail.python.org/mailman/listinfo/python-list
Re: translating foreign data
On 06/21/2018 12:07 PM, codewiz...@gmail.com wrote: On Thursday, June 21, 2018 at 1:08:35 PM UTC-4, Ethan Furman wrote: I need to translate numeric data in a string format into a binary format. I know there are at least two different methods of representing parts less that 1, such as "10.5" and "10,5". The data is encoded using code pages, and can vary depending on the file being read (so I can't rely on current locale settings). I'm sure this is a solved problem, but I'm not finding those solutions. Any pointers? Try this StackOverflow answer: https://stackoverflow.com/a/17815252 --> import locale --> a = u'545,545.' --> locale.setlocale(locale.LC_ALL, 'en_US.UTF-8') 'en_US.UTF-8' The problem there is it sets the locale for the entire process -- I just need the conversion step for individual pieces of data without modifying the user's settings. -- ~Ethan~ -- https://mail.python.org/mailman/listinfo/python-list
Re: syntax difference
Alister: == which can be implemented in python by putting function calls as members of a list or dictionary switch=[case1,case2,case3] switch[a]() == This is the approach you might use when you don't have a proper switch. It could be done in C that way. Problems: the code for the different cases is not localised. You have to think up function names. The cases must be listed in that order. If the first case is not zero, you have to deal with that. Gaps in the sequence are problematical. You need a way of detecting the default case. There is no association between case number and its entry. The case numbers may be named values, so won't know what order they need to be in. Using a dict will solve some of that, but its not clear what overheads there are in setting up the dict. A proper switch also allows lists, ranges and scalars, or any mix, for each case block. It's not clear how a dict can be used for that, without adding another layer of processing which defeats part of the purpose in having switch. Above all, you lose the clarity of a proper switch construct. Alister: == (although i personally would still like to see a switch if anyone can come up with a suitable syntax that does not break the rest of the python philosophy wtr indentation.) == The syntax is a minor detail. The biggest problem with adding an int-based switch to Python that uses a jump-table is that that requires the case values to be known at compile-time. Usually they won't be. I came up with a way around this which used tentative byte code which is fixed up the first time it is executed. But that is rather hairy, and it means case values are fixed: if A is a case value of 10, then if later on it is 20, it will be treated as 10 still. For such reasons it is unlikely to make it into Python in that form. However a switch statement can still be useful for its expressiveness, and implemented as sequential tests. -- Bart -- https://mail.python.org/mailman/listinfo/python-list
Re: translating foreign data
Ethan Furman writes: > I need to translate numeric data in a string format into a binary > format. I know there are at least two different methods of > representing parts less that 1, such as "10.5" and "10,5". The data > is encoded using code pages, and can vary depending on the file being > read (so I can't rely on current locale settings). > > I'm sure this is a solved problem, but I'm not finding those > solutions. Any pointers? You say "at least two" and give two but not knowing the others will hamper anyone trying to help. (I appreciate that you may not yet know if there are to be any others.) You say in a followup that you don't need to worry about digit grouping marks (like thousands separators) so I'm not sure what the problem is. Can't you just replace ',' with '.' a proceed as if you had only one representation? The code page remark is curious. Will some "code pages" have digits that are not ASCII digits? -- Ben. -- https://mail.python.org/mailman/listinfo/python-list
Re: translating foreign data
Ethan Furman wrote: > I need to translate numeric data in a string format into a binary format. > I know there are at least two different > methods of representing parts less that 1, such as "10.5" and "10,5". The > data is encoded using code pages, and can vary depending on the file being > read (so I can't rely on current locale settings). > > I'm sure this is a solved problem, but I'm not finding those solutions. > Any pointers? There's babel http://babel.pocoo.org/en/latest/numbers.html#parsing-numbers though I'm not sure what to think of the note below the linked paragraph. -- https://mail.python.org/mailman/listinfo/python-list
Re: Feeding the trolls
On 21/06/2018 05:02, Abdur-Rahmaan Janhangeer wrote: by building a custom py-based mail client maybe ^^_ Abdur-Rahmaan Janhangeer https://github.com/Abdur-rahmaanJ On Wed, 20 Jun 2018, 17:18 D'Arcy Cain, wrote: On 2018-06-20 08:10 AM, Tim Golden wrote: [... snip discussions about Bart's language ...] Wearing my moderator hat Can we take the "Bart's language vs Python Show" to some other forum, please? We've already gone over this ground again and again and it isn't helping the signal-to-noise ratio here on the Python list / comp.lang.python Thank you. Many of us have blocked rick and bart years ago. If you are just going to feed the trolls we have to see their nonsense anyway. Just email them privately if you really feel the need to vent. One of these days I will have to figure out how to block replies to the trolls as well. -- D'Arcy J.M. Cain Vybe Networks Inc. http://www.VybeNetworks.com/ IM:da...@vex.net VoIP: sip:da...@vybenetworks.com -- https://mail.python.org/mailman/listinfo/python-list Design requirements for python newsreader client: 1. Block all top posters -- https://mail.python.org/mailman/listinfo/python-list
Re: translating foreign data
Peter Otten <__pete...@web.de> ezt írta (időpont: 2018. jún. 21., Cs, 22:45): > Ethan Furman wrote: > > > I need to translate numeric data in a string format into a binary > format. > > I know there are at least two different > > methods of representing parts less that 1, such as "10.5" and "10,5". > The > > data is encoded using code pages, and can vary depending on the file > being > > read (so I can't rely on current locale settings). > > > > I'm sure this is a solved problem, but I'm not finding those solutions. > > Any pointers? > > There's babel > > http://babel.pocoo.org/en/latest/numbers.html#parsing-numbers > > though I'm not sure what to think of the note below the linked paragraph. > > > -- > https://mail.python.org/mailman/listinfo/python-list Hi, if you have several values in a file, then you probably you can check the delimiters: there is only one decimal separator, - so if you find a number with 2 separators, then a rightmost is a the decimal - if you found only one type, then that is the decimal - try to check the separator from right to left - if you found 4 digits right to a separator, then that is the decimal separator etc (maybe wikipedia should be checked for other separators. Other thousand separators used: space, apostrophe, and in India after the first thousand separator the separation is done with two numbers, not three And if you are able to identify the encoding codepage, then you should follow what the codepage says Another help can be if know the possible value range of the numbers (maybe it should be asked ...) George -- https://mail.python.org/mailman/listinfo/python-list
Re: translating foreign data
George Fischhof wrote: - if you found only one type, then that is the decimal Only if you're sure that all numbers contain a decimal separator. Otherwise there's no way to be sure in general. -- Greg -- https://mail.python.org/mailman/listinfo/python-list
Re: Feeding the trolls
On Thu, 21 Jun 2018 21:49:15 +0100, mm0fmf wrote: [snip unnecessary quoting] > Design requirements for python newsreader client: > > 1. Block all top posters I think it would be far more useful to block bottom-posters who don't snip irrelevant quoted text. -- Steven D'Aprano "Ever since I learned about confirmation bias, I've been seeing it everywhere." -- Jon Ronson -- https://mail.python.org/mailman/listinfo/python-list
Re: translating foreign data
On 21Jun2018 10:12, Ethan Furman wrote: I need to translate numeric data in a string format into a binary format. I know there are at least two different methods of representing parts less that 1, such as "10.5" and "10,5". The data is encoded using code pages, and can vary depending on the file being read (so I can't rely on current locale settings). I'm sure this is a solved problem, but I'm not finding those solutions. Any pointers? It sounds like you're conflating two problems: - the file character data encoding - the numeric representation Can't you just read the file as a text file using the correct codepage->decoding setting to get strings, _then_ parse numbers either with some clunky regexp based approach or some flexible external library for common numeric forms? (Someone suggested babel, I've never used it.) Cheers, Cameron Simpson -- https://mail.python.org/mailman/listinfo/python-list
Re: Feeding the trolls
aie maybe we can learn then warn ! mail sender is top poster Abdur-Rahmaan Janhangeer https://github.com/Abdur-rahmaanJ Design requirements for python newsreader client: > > 1. Block all top posters > -- https://mail.python.org/mailman/listinfo/python-list
Re: Feeding the trolls
Steven D'Aprano wrote: On Thu, 21 Jun 2018 21:49:15 +0100, mm0fmf wrote: Design requirements for python newsreader client: 1. Block all top posters I think it would be far more useful to block bottom-posters who don't snip irrelevant quoted text. In the early days of Usenet, it was common for news servers to refuse posts that didn't have a high enough ratio of new to quoted text. . . . . . . . . . . . . . It was easily defeated, of course. :-) But at least it forced you to think about the issue. -- Greg -- https://mail.python.org/mailman/listinfo/python-list
ironpython not support py3.6
We have a project implemented with c# and python, iron python is a good choice for us to integrate these two tech together but iron python not support python 3.6 yet, any suggest for this? -- https://mail.python.org/mailman/listinfo/python-list
