line error on no. 7
Hi Everyone, I'm writing python code to read a data text file, split the file into a list of words using the split(function) and to print the results in alphabetical order. The raw python code is located at http://tinyurl.com/oua9uqx The sample data is located at http://tinyurl.com/odt9nhe Desired Output: ['Arise', 'But', 'It', 'Juliet', 'Who', 'already', 'and', 'breaks', 'east', 'envious', 'fair', 'grief', 'is', 'kill', 'light', 'moon', 'pale', 'sick', 'soft', 'sun', 'the', 'through', 'what', 'window', 'with', 'yonder'] There is a line error on no. 7 What is the cause of this error? Regards, Hal Sent from Surface-- https://mail.python.org/mailman/listinfo/python-list
String Attribute
Hi Everyone: What is the source of the syntax error to the String Attribute? Go to the following URL links and view a copy of the raw data file code and sample data: 1.) http://tinyurl.com/p2xxxhl 2.) http://tinyurl.com/nclg6pq Here is the desired output: stephen.marqu...@uct.ac.za lo...@media.berkeley.edu Hal Sent from Surface-- https://mail.python.org/mailman/listinfo/python-list
Help Command Question
Hi Everyone, I'm trying to print a command of list options by using the help command in the iPython interpreter. Read captured copy of the printout as follows: 'Python 2.7.10 |Anaconda 2.3.0 (64-bit)| (default, May 28 2015, 16:44:52) [MSC v. 1500 64 bit (AMD64)] Type "copyright", "credits" or "license" for more information. IPython 3.2.0 -- An enhanced Interactive Python. Anaconda is brought to you by Continuum Analytics. Please check out: http://continuum.io/thanks and https://anaconda.org In [1]: help list File "", line 1 help list ^ SyntaxError: invalid syntax.' Question: What is the correct help command? Regards, Hal Sent from Surface-- https://mail.python.org/mailman/listinfo/python-list
Re: [Tutor] Mailbox
Hi Cameron,
New revision code:
count = 0
fn = raw_input("Enter file name: ")
if len(fn) < 1 : fname = "mbox-short.txt"
for line in fn:
if 'From' in line.split()[0]: count += 1
print "There are %d lines starting with From" % count
print len(line)
fn = open(fname)
print "There were", count, "lines in the file with From as the first word"
Syntax message produced by iPython interperter:
NameError Traceback (most recent call last)
C:\Users\vm\Desktop\apps\docs\Python\assinment_8_5_v_2.py in ()
6 print "There are %d lines starting with From" % count
7 print len(line)
> 8 fn = open(fname)
9 print "There were", count, "lines in the file with From as the first wor
d"
NameError: name 'fname' is not defined
In [16]:
Question:
Why is fname = "mbox-short.txt" not loading the sample data?
Sample data file is located at http://www.pythonlearn.com/code/mbox-short.txt
Regards,
Hal
Sent from Surface
From: Cameron Simpson
Sent: Wednesday, July 29, 2015 7:01 PM
To: tu...@python.org
On 29Jul2015 21:55, ltc.hots...@gmail.com wrote:
>I have a second and unrelated question:
>
>I tried to work backward to see if there is a logic error associated with a
>variable is being skipped over:
>
>#top of code, initialize variable
>output_list = ["default"]
Curious: why not just make this an empty list: []
[...snip...]
>count = 0
>fname = raw_input("Enter file name: ")
>if len(fname) < 1 : fname = "mbox-short.txt"
>for line in fname:
>line = line.strip()
>if not line.startswith('From '): continue
>line = line.split()
>count = count + 1
>print len(line)
>fh = open(fname)
>print "There were", count, "lines in the file with From as the first word"
[...snip...]
My first observation would be that "count = count + 1" is not inside the loop.
That means that it fires just once, _after_ the loop. So it will always be 1.
Also, what is the purpose of this line:
line = line.split()
Cheers,
Cameron Simpson
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Re: How to rearrange array using Python?
Hi Mark, I’m still confused because line 4 reads: fh=open(fname,'r') # Open a new file handle, not fn = open(fname) Can you write down line by line from error to correction? Hal Sent from Surface From: Mark Lawrence Sent: Thursday, July 30, 2015 3:21 PM To: python-list@python.org On 30/07/2015 21:31, Martin Schöön wrote: > Here is a problem I think I should be able to solve using Python but > after having searched the internet for the better part of this > evening my head spins and I would apreciate some guidance. > > Disclaimer > > My formal programming training happened 35+ years ago and > initially involved F77 and later Pascal. Python is something > I have picked up lately and for fun. I don't master Python by any > stretch of imagination. I know some linear algebra and numerical > methods but don't practice any of this on a daily basis... > > Problem background > > I am just back from visiting my sisters and the younger of them > was busy planning a youth orchestra summer camp. For some reason > the kids are allowed to wish with whom they want to share rooms > and my sister spent several evenings placing kids in rooms > according to these wishes. It struck me that at least some of this > work could be done by silicon running code. > > My thinking so far > > I have played around a little with something called DSM > https://en.wikipedia.org/wiki/Design_structure_matrix > at work and think entering all wishes into a 2D array > for further processing and overview should be a good idea. > > An added piece of information is the number of and sizes > of rooms. I want to overlay this on the array and re-shuffle > until as many of the wishes as possible are fulfilled. > > Here is a picture that may help understanding what I am after: > https://picasaweb.google.com/103341501341482571816/Miscellaneous#6177389865951753330 > In this example I have 25 individuals (each allowed two wishes), > one 5-bed room, two 4-bed rooms and four 3-bed rooms. > Wishes are marked by "1" so a wants to sleep in the same room > as i and n etc. The rooms are shown as light grey squares > along the diagonal. Scores to the right show how many wishes > are fulfilled in each room and at the bottom right corner I > have the total score. The goal is to re-shuffle the array > to maximize this score. > > How do I go about doing that? > > Note: This example is worse than the real life problem as > most kids go to this camp with friends and wishes are > highly coordinated. I used a random number generator to > create wishes... The real problem involves some 80 kids. > There are some more differences but let us leave them out > for now. > > TIA > > /Martin > I'm not absolutely certain but I think you're into what's known as a constraint satisfaction problem, in which case this https://pypi.python.org/pypi/python-constraint/1.2 is as good a starting point as any. If I'm wrong we'll soon get told :) -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence -- https://mail.python.org/mailman/listinfo/python-list-- https://mail.python.org/mailman/listinfo/python-list
'open' is not defined
Hi Everyone:
Why is open not defined in the following code:NameError: name 'open' is not
defined
Code reads as follows:
fname = raw_input("Enter file name: ")
if len(fname) < 1 : fname = "mbox-short.txt"
fh = open(fname)
count = 0
for line in fh:
if not line.startswith('From'): continue
line2 = line.strip()
line3 = line2.split()
line4 = line3[1]
print line4
count = count + 1
print "There were", count, "lines in the file with From as the first word"
Regards,
Hal
Sent from Surface--
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Re: 'open' is not defined
Dieter,
Thanks. What about using the append function to remove duplicate outputs
entered on or thereafter line no. 9, i.e.,
LIST_APPEND(i) Calls list.append(TOS[-i], TOS). Used to implement list
comprehensions. While the appended value is popped off, the list object remains
on the stack so that it is available for further iterations of the loop. URL
link available at
https://docs.python.org/2.7/library/dis.html?highlight=append%20list#opcode-LIST_APPEND
What is the command line for such an append function?
Hal
Sent from Surface
Sent from Surface
From: dieter
Sent: Thursday, July 30, 2015 11:22 PM
To: python-list@python.org
writes:
> ...
> Why is open not defined in the following code:NameError: name 'open' is not
> defined
>
> Code reads as follows:
>
> fname = raw_input("Enter file name: ")
> if len(fname) < 1 : fname = "mbox-short.txt"
> fh = open(fname)
> count = 0
> for line in fh:
> if not line.startswith('From'): continue
> line2 = line.strip()
> line3 = line2.split()
> line4 = line3[1]
> print line4
> count = count + 1
> print "There were", count, "lines in the file with From as the first word"
You might execute the code above in a "restricted execution environment"
(one where "__builtins__" is not the typical "__builtin__" module --
that's how "open" (and other builtins) is found).
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