[Tutor] rstrip in list?
I printed out some random numbers to a list and use 'print mylist' and they came out like this: ['102\n', '231\n', '463\n', '487\n', '555\n', '961\n'] I was using 'print mylist.rstrip()' to strip off the '\n' but kept getting an error of : AttributeError: 'list' object has no attribute 'rstrip' My memory must be hazy but I thought I had it working several months ago. Any idea or suggestion? TIA, Ken ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Closing a matplotlib window after show()
Hi, recently I have the same problem with Matplotlib. I wrote a wxpython program which can plot a graph when click a button. When I click the button first time, I got the plot correct, but when I closed the figure, and clicked the button again, the code crashed. I have to reopen the program, and the same problem happened. The solution is that put import matplotlib.pyplot as plt before you plot anything. Then everything works fine. I don't know why. It seems that when you close the figure, the imported module or function stop working. It has to be imported every time. On Tue, Feb 9, 2010 at 5:00 AM, tutor-requ...@python.org wrote: Send Tutor mailing list submissions to tutor@python.org To subscribe or unsubscribe via the World Wide Web, visit http://mail.python.org/mailman/listinfo/tutor or, via email, send a message with subject or body 'help' to tutor-requ...@python.org You can reach the person managing the list at tutor-ow...@python.org When replying, please edit your Subject line so it is more specific than Re: Contents of Tutor digest... Today's Topics: 1. python (ailx ailx) 2. Re: python (Luke Paireepinart) 3. Re: Closing a matplotlib window after show() (Wayne Watson) -- Message: 1 Date: Tue, 9 Feb 2010 10:54:06 +0800 From: ailx ailx ailxr...@gmail.com To: tutor@python.org Subject: [Tutor] python Message-ID: 5fc821071002081854k2fa92309ned9389b9f3d91...@mail.gmail.com Content-Type: text/plain; charset=iso-8859-1 python -- next part -- An HTML attachment was scrubbed... URL: http://mail.python.org/pipermail/tutor/attachments/20100209/a46c4683/attachment-0001.htm -- Message: 2 Date: Mon, 8 Feb 2010 21:09:59 -0600 From: Luke Paireepinart rabidpoob...@gmail.com To: ailx ailx ailxr...@gmail.com Cc: tutor@python.org Subject: Re: [Tutor] python Message-ID: dfeb4471002081909t496fc217w355010e085b66...@mail.gmail.com Content-Type: text/plain; charset=iso-8859-1 quite. On Mon, Feb 8, 2010 at 8:54 PM, ailx ailx ailxr...@gmail.com wrote: python ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor -- next part -- An HTML attachment was scrubbed... URL: http://mail.python.org/pipermail/tutor/attachments/20100208/b19399fe/attachment-0001.htm -- Message: 3 Date: Mon, 08 Feb 2010 21:53:39 -0800 From: Wayne Watson sierra_mtnv...@sbcglobal.net To: Eike Welk eike.w...@gmx.net Cc: tutor@python.org Subject: Re: [Tutor] Closing a matplotlib window after show() Message-ID: 4b70f863.1070...@sbcglobal.net Content-Type: text/plain; charset=ISO-8859-1; format=flowed Hi, I'm not so sure that's true. I have a large 900 line program where some original plot code just continues beyond plot() and show(), after the user closes the plot window. New code that I put in gets knotted up, as far as I can tell. In both cases, I've put print statements after show(), but nothing appears in the shell or, if run by clicking the program file, in the DOS-like window that appears. Further, I posted this elsewhere, and someone claims to have tried a few simple examples with show() at the ended,and they did not get tied up in knots when the user closed the window. I'm going to assume he used IDLE, or a straight execute of the file. On 2/8/2010 2:23 PM, Eike Welk wrote: Hello Wayne! On Monday February 8 2010 20:54:27 Wayne Watson wrote: The basic problem is the show(). One person checked out the examples I provided and found show() to operate fine. On my XP machine the program I'm modifying has plot code someone put in a year or two ago, and it all works fine. My code produces the desired plot, but gets hung up on show(). The behavior that you describe, is the normal behavior of Matplotlib: When you call show(), the program gets stuck. Therefore the call to show is always the last statement in the example programs. Show returns when the last plot window is closed, and in principle the program could then continue. If you want to look at plots while the program is running, you must use Ipython. This is a modified Python interpreter, that contains special code to change the way how Matplotlib works. http://ipython.scipy.org/moin/ Eike. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor -- Crime is way down. War is declining. And that's far from the good news. -- Steven Pinker (and other sources) Why is this true, but yet the media says otherwise? The media knows very well how to manipulate us
Re: [Tutor] rstrip in list?
On Wed, 10 Feb 2010 02:28:43 am Ken G. wrote: I printed out some random numbers to a list and use 'print mylist' and they came out like this: ['102\n', '231\n', '463\n', '487\n', '555\n', '961\n'] I was using 'print mylist.rstrip()' to strip off the '\n' but kept getting an error of : AttributeError: 'list' object has no attribute 'rstrip' You have to apply rstrip to each item in the list, not the list itself. Here are two ways to do it: #1: modify the list in a for-loop for i, item in enumerate(mylist): mylist[i] = item.rstrip() #2: make a new list with a list comprehension mylist = [item.rstrip() for item in mylist] Of the two, I prefer the second. -- Steven D'Aprano ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] rstrip in list?
Kent Johnson wrote: On Tue, Feb 9, 2010 at 10:28 AM, Ken G. beach...@insightbb.com wrote: I printed out some random numbers to a datafile and use 'print mylist' and they came out like this: ['102\n', '231\n', '463\n', '487\n', '555\n', '961\n'] How are you generating this list? You should be able to create it without the \n. That would be better than stripping them out. I inputting some random numbers into a database and then created a list and appended the list as it read the database. I was using 'print mylist.rstrip()' to strip off the '\n' but kept getting an error of : AttributeError: 'list' object has no attribute 'rstrip' My memory must be hazy but I thought I had it working several months ago. Any idea or suggestion? Use a list comprehension or map(): In [1]: l = ['102\n', '231\n', '463\n', '487\n', '555\n', '961\n'] In [2]: [ i.rstrip() for i in l ] Out[2]: ['102', '231', '463', '487', '555', '961'] In [3]: map(str.rstrip, l) Out[3]: ['102', '231', '463', '487', '555', '961'] Kent My database file has numbers of the same exact length that need to be sorted. I am using 'mylist.sort()' as one of the command. Actually, I will be using 'mylist.reverse' after that command. I am still in a learning mode. Thanks. Ken ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] rstrip in list?
Ken G. wrote: I printed out some random numbers to a list and use 'print mylist' and they came out like this: ['102\n', '231\n', '463\n', '487\n', '555\n', '961\n'] I was using 'print mylist.rstrip()' to strip off the '\n' but kept getting an error of : AttributeError: 'list' object has no attribute 'rstrip' rstrip is a string method, not a list method. You must apply it to each element in the list. One way is: print [item.rstrip() for iten in mylist] -- Bob Gailer 919-636-4239 Chapel Hill NC ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] rstrip in list?
On Tue, Feb 9, 2010 at 11:09 AM, Ken G. beach...@insightbb.com wrote: Kent Johnson wrote: On Tue, Feb 9, 2010 at 10:28 AM, Ken G. beach...@insightbb.com wrote: I printed out some random numbers to a datafile and use 'print mylist' and they came out like this: ['102\n', '231\n', '463\n', '487\n', '555\n', '961\n'] How are you generating this list? You should be able to create it without the \n. That would be better than stripping them out. I inputting some random numbers into a database and then created a list and appended the list as it read the database. If you show the code for this perhaps we can figure out where the newlines are coming from. Kent ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] rstrip in list? (SOLVED)
There was so many different solutions presented here to me.
Thanks to all. By adding '.strip('\n') to the last two lines below, it
came out:
Sorted List
['102', '231', '463', '487', '555', '961']
for line in file.readlines():
print line.strip('\n'),
mylist.append(line.strip('\n'))
Further work and studying needed here. LOL.
Ken
Steven D'Aprano wrote:
On Wed, 10 Feb 2010 02:28:43 am Ken G. wrote:
I printed out some random numbers to a list and use 'print mylist'
and they came out like this:
['102\n', '231\n', '463\n', '487\n', '555\n', '961\n']
I was using 'print mylist.rstrip()' to strip off the '\n'
but kept getting an error of :
AttributeError: 'list' object has no attribute 'rstrip'
You have to apply rstrip to each item in the list, not the list itself.
Here are two ways to do it:
#1: modify the list in a for-loop
for i, item in enumerate(mylist):
mylist[i] = item.rstrip()
#2: make a new list with a list comprehension
mylist = [item.rstrip() for item in mylist]
Of the two, I prefer the second.
___
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[Tutor] Embarrassed...
I am a little embarrassed. I just happen to found a program I wrote in December that create random numbers into a file, copy the numbers into a list, print the numbers unsorted and sorted from the list without printing '\n'. Nevertheless, I do thanks you all for trying to help me out. Ken ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Closing a matplotlib window after show()
Form me the solution is getting into interactive mode, which I had never heard of until this morning. On 2/9/2010 9:04 AM, Wayne Watson wrote: Well, you are correct. Finally, my latest post to the MPL list caught the eye of John Hunter. I think he wrote MPL. The way out is interactive use. One problem I've had with Python packages they seem to based on some other ... -- Crime is way down. War is declining. And that's far from the good news. -- Steven Pinker (and other sources) Why is this true, but yet the media says otherwise? The media knows very well how to manipulate us (see limbic, emotion, $$). -- WTW ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] apache2.2 - django deployment
Hi all, I wanna deploy a django program on apache2.2. So I downloaded mod_wsgi-win32-ap22py26-3.0.so and copied it into apache2.2/modules/, renamed mod_wsgi.so. in httpd.conf I appended sentence: LoadModule python_module modules/mod_wsgi.so Then It failed to start the server: httpd.exe: Syntax error on line 128 of C:/Program Files/Apache Software Foundati on/Apache2.2/conf/httpd.conf: Can't locate API module structure `python_module' in file C:/Program Files/Apache Software Foundation/Apache2.2/modules/mod_wsgi.s o: No error Note the errors or messages above, and press the ESC key to exit. 21... Pls help me. thanks:) ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] apache2.2 - django deployment
Joson, Everything looks good but I think the *module name is incorrect.* Change: LoadModule *python_module *modules/mod_wsgi.so To: LoadModule *wsgi_module *modules/mod_wsgi.so Glen On Tue, Feb 9, 2010 at 2:27 PM, Joson zhuchu...@gmail.com wrote: Hi all, I wanna deploy a django program on apache2.2. So I downloaded mod_wsgi-win32-ap22py26-3.0.so and copied it into apache2.2/modules/, renamed mod_wsgi.so. in httpd.conf I appended sentence: LoadModule python_module modules/mod_wsgi.so Then It failed to start the server: httpd.exe: Syntax error on line 128 of C:/Program Files/Apache Software Foundati on/Apache2.2/conf/httpd.conf: Can't locate API module structure `python_module' in file C:/Program Files/Apache Software Foundation/Apache2.2/modules/mod_wsgi.s o: No error Note the errors or messages above, and press the ESC key to exit. 21... Pls help me. thanks:) ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] apache2.2 - django deployment
Joson, Everything looks good but I think the *module name is incorrect.* Change: LoadModule *python_module *modules/mod_wsgi.so To: LoadModule *wsgi_module *modules/mod_wsgi.so Glen On Tue, Feb 9, 2010 at 2:27 PM, Joson zhuchu...@gmail.com wrote: Hi all, I wanna deploy a django program on apache2.2. So I downloaded mod_wsgi-win32-ap22py26-3.0.so and copied it into apache2.2/modules/, renamed mod_wsgi.so. in httpd.conf I appended sentence: LoadModule python_module modules/mod_wsgi.so Then It failed to start the server: httpd.exe: Syntax error on line 128 of C:/Program Files/Apache Software Foundati on/Apache2.2/conf/httpd.conf: Can't locate API module structure `python_module' in file C:/Program Files/Apache Software Foundation/Apache2.2/modules/mod_wsgi.s o: No error Note the errors or messages above, and press the ESC key to exit. 21... Pls help me. thanks:) ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Exiting a Tkinter Program-- An Anomaly or two
I'm looking a 1800+ line someone else wrote. It uses one large dialog for menus, and has a large area for images. A few menus open small dialogs, for example, to enter a file name. The File menu has an exit choice. The only other exit is the x in the upper right corner of the large dialog. I'm pretty sure that menu is coded to quit via a shoft def in the program. def Quite(self) self.running = False self.master.quit() I see no other code to quit. If I use Exit, the program does not quite. If I then use the x, it quits and the shell script is left open for a command. Any ideas why Quit doesn't work? It's accessible via a self.mainMenu.add_command(.. command=self.Quit) I had not turned the program loose by using a menu or touching any controls. If I cause the program to print to the shell, and then use x to exit that it hangs the shell. Why? When I x the shell, it tells me the prog is running. Do I want to kill it. Yes,kills the shell window. The above seem abnormal to me. Comments? -- Crime is way down. War is declining. And that's far from the good news. -- Steven Pinker (and other sources) Why is this true, but yet the media says otherwise? The media knows very well how to manipulate us (see limbic, emotion, $$). -- WTW ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] NameError: global name 'celsius' is not defined (actually, solved)
Hi guys, I just wrote this message, but after restarting ipython all worked fine. How is it to be explained that I first had a namespace error which, after a restart (and not merely a new run Sande_celsius-main.py), went away? I mean, surely the namespace should not be impacted by ipython at all!? Many thanks, David Dear List, this should be so basic that I feel bad asking this question here, but I don't get it. I am having a look at Sande's book Hello World. The topic is 'Modules', and the code comes directly from the book. I have two files: Sande_celsius-main.py and Sande_my_module.py. I import the latter from within the former. # file: Sande_celsius-main.py from Sande_my_module import c_to_f celsius = float(raw_input(Enter a temperature in Celsius: )) fahrenheit = c_to_f(celsius) print That's , fahrenheit, degrees Fahrenheit # this is the file Sande_my_module.py # we're going to use it in another program def c_to_f(celsius): fahrenheit = celsius * 9.0 / 5 + 32 return fahrenheit When I run Sande_celsius-main.py, I get the following error: NameError: global name 'celsius' is not defined WARNING: Failure executing file: Sande_celsius-main.py First of all, this error message doesn't exactly tell me _where_ the problem is, does it? It could be a problem with(in) the imported function c_to_f... I wish he would tell me: Problem in file x, line y. Secondly, the name celsius in the global namespace of ~-main.py is merely a variable, which later is then used as a parameter to c_to_f. I do not see a problem here. What is going on? ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] NameError: global name 'celsius' is not defined (actually, solved)
I just wrote this message, but after restarting ipython all worked fine. How is it to be explained that I first had a namespace error which, after a restart (and not merely a new run Sande_celsius-main.py), went away? I mean, surely the namespace should not be impacted by ipython at all!? : # file: Sande_celsius-main.py from Sande_my_module import c_to_f celsius = float(raw_input(Enter a temperature in Celsius: )) fahrenheit = c_to_f(celsius) print That's , fahrenheit, degrees Fahrenheit # this is the file Sande_my_module.py # we're going to use it in another program def c_to_f(celsius): fahrenheit = celsius * 9.0 / 5 + 32 return fahrenheit When I run Sande_celsius-main.py, I get the following error: NameError: global name 'celsius' is not defined WARNING: Failure executing file: Sande_celsius-main.py Python interpreters including the standard one or IPython should tell you a lot more than that. how are you executing this code? would it be possible to do so from the command-line? you should get a more verbose error message that you can post here. best regards, -- wesley - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Core Python Programming, Prentice Hall, (c)2007,2001 Python Fundamentals, Prentice Hall, (c)2009 http://corepython.com wesley.j.chun :: wescpy-at-gmail.com python training and technical consulting cyberweb.consulting : silicon valley, ca http://cyberwebconsulting.com ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] NameError: global name 'celsius' is not defined (actually, solved)
Hello Wesley, thanks for your reply. I was surprised about the limited information too. Sadly (?), I can't reproduce the error any more... David On 10/02/10 11:13, wesley chun wrote: I just wrote this message, but after restarting ipython all worked fine. How is it to be explained that I first had a namespace error which, after a restart (and not merely a new run Sande_celsius-main.py), went away? I mean, surely the namespace should not be impacted by ipython at all!? : # file: Sande_celsius-main.py from Sande_my_module import c_to_f celsius = float(raw_input(Enter a temperature in Celsius: )) fahrenheit = c_to_f(celsius) print That's , fahrenheit, degrees Fahrenheit # this is the file Sande_my_module.py # we're going to use it in another program def c_to_f(celsius): fahrenheit = celsius * 9.0 / 5 + 32 return fahrenheit When I run Sande_celsius-main.py, I get the following error: NameError: global name 'celsius' is not defined WARNING: Failure executing file:Sande_celsius-main.py Python interpreters including the standard one or IPython should tell you a lot more than that. how are you executing this code? would it be possible to do so from the command-line? you should get a more verbose error message that you can post here. best regards, -- wesley - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Core Python Programming, Prentice Hall, (c)2007,2001 Python Fundamentals, Prentice Hall, (c)2009 http://corepython.com wesley.j.chun :: wescpy-at-gmail.com python training and technical consulting cyberweb.consulting : silicon valley, ca http://cyberwebconsulting.com ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] how to clear contents of a file
hi, how to clear contents of a file with out actually deleting it, basically wat im trying to do is copy a source file into a common file ,run the common file,after that i need to copy another source file into the common file,i ant to clear the contents of the common file before copying contents into it.how does f.truncate() helps here thanks, sudheer ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how to clear contents of a file
sudhir prasad wrote: hi, how to clear contents of a file with out actually deleting it, basically wat im trying to do is copy a source file into a common file ,run the common file,after that i need to copy another source file into the common file,i ant to clear the contents of the common file before copying contents into it.how does f.truncate() helps here thanks, sudheer ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor You can just open the file again in write mode which will truncate it for you. So, f = open(filename, 'w') will clear the contents of your filename (don't forget to close the file when you're done if you do this though). -- Kind Regards, Christian Witts ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
