[Tutor] Running Existing Python
I downloaded Python 2.7.1. I think this is a pretty basic question. When I try to run the existing python files on the computer (hello.py), I receive a syntax error. Python 2.7.1 (r271:86882M, Nov 30 2010, 10:35:34) [GCC 4.2.1 (Apple Inc. build 5664)] on darwin Type "copyright", "credits" or "license()" for more information. >>> python hello.py SyntaxError: invalid syntax I am running Mac OS X version 10.6.6. Shouldn't I be able to run hello.py from the IDLE interpreter? ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Running Existing Python
Okay. When I try to run the script from the terminal, it still doesn't work. Here is a screenshot. <> What am I doing wrong? On Feb 25, 2011, at 6:46 PM, Alan Gauld wrote: > > "Justin Bonnell" wrote > >> Python 2.7.1 (r271:86882M, Nov 30 2010, 10:35:34) [GCC 4.2.1 (Apple Inc. >> build 5664)] on darwin >> Type "copyright", "credits" or "license()" for more information. > > The >>> prompt means you are already inside Python. > You can type Python commands at the >>> prompt, things like > >>>> print "Hello" > > But you cannot ruin a program from inside the >>> prompt (well, you can, but > its more complicated than sane people want to bother with! :-) > > You run a Python script from the OS Terminal prompt: > > $ python hello.py > >> Shouldn't I be able to run hello.py from the IDLE interpreter? > > You can't run it from the >>> prompt in IDLE but > What you can do is open the file for editing and then run that file using the > menu commands, then the output will show up in the interpreter window. > I get how to do this now^^ > HTH, > > -- > Alan Gauld > Author of the Learn to Program web site > http://www.alan-g.me.uk/ > > > > ___ > 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] Running Existing Python
On Feb 26, 2011, at 4:49 AM, Dave Angel wrote: > On 01/-10/-28163 02:59 PM, Justin Bonnell wrote: >> Okay. When I try to run the script from the terminal, it still doesn't work. >> Here is a screenshot. >> >> >> >> >> >> What am I doing wrong? >> > 1) You're top-posting. Put your responses after the quote you're responding > to. --Okay. I'm pretty new to this so most of my responses were just general questions rather than specific responses. > > 2) You're trying to include graphical images in a text-based newsgroup. Just > use copy/paste, and include it in your message. --Got it. I will do that from now on. > > 3) You don't tell us where the hello.py file actually is. Presumably it's > not in the current directory when you run that. Two cures for that: either > specify its real location, > python ~/mysources/hello.py --This is the location of the file: /jwbonnell/bin/Python 2.7/Extras/Demo/tkinter/guido/hello.py but it still says it cannot find the directory when I try to run it or cd to it. Is there any way that I can tell which directory the shell is currently working from? > or cd to the proper directory. The latter is usually easier, but it depends > where other files your script are located. > > DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Running Existing Python
On Feb 26, 2011, at 3:29 AM, Alan Gauld wrote: This is really helpful directions and I am trying to follow what you're saying. I think you are getting my response to another person helping me so this will basically repeat what I was saying there. I am really new to this and am trying to learn on my own so thanks for your help and patience. > The error says it can't find the file hello.py. > That means its probably in some other folder > or you need to specify the full or relative path to the file > This is a MacOS issue not Python, its how your MacOS > shell is searching for the file. > > If it is in the same folder try explicitly telling MacOS: > > $ python ./hello.py > > Or if it is somewhere else either cd to that folder > or type the path: > > $ python /the/full/path/to/the/dfile/hello.py --I tried to follow this using: /jwbonnell/bin/Python 2.7/Extras/Demo/tkinter/guido/hello.py which is the correct location of the hello.py file. > > There are some environment variables you can > set in your login script which will help MacOS > find the files but they depend on which shell > Terminal is running, tcsh or bash are the usual > options. --My Terminal is running bash. > > Finally there is a trick you can use on the hello.py > file that means you can launch the .py file directly > from Finder. It's called the shebang trick by Unix > folks. > > Basically you add a line like > > #! /usr/env/python > > To the very top of the file. MacOS will then use that > command to execute the script. If usr/env doesn't > work type --So if I add that line to the file, then I use $ python /usr/env/python ? > > $ which python --This is the correct for my computer: /Library/Frameworks/Python.framework/Versions/2.7/bin/python > > and copy the output instead of /usr/env > > > Alan Gauld > Author of the Learn To Program website > http://www.alan-g.me.uk/ > > > > > - Original Message >> From: Justin Bonnell >> To: Alan Gauld >> Cc: tutor@python.org >> Sent: Saturday, 26 February, 2011 6:49:37 >> Subject: Re: [Tutor] Running Existing Python >> >> Okay. When I try to run the script from the terminal, it still doesn't work. >> >> Here is a screenshot. >> >> >> What am I doing wrong? >> >> >> On Feb 25, 2011, at 6:46 PM, Alan Gauld wrote: >> >>> >>> "Justin Bonnell" wrote >>> >>>> Python 2.7.1 (r271:86882M, Nov 30 2010, 10:35:34) [GCC 4.2.1 (Apple Inc. >> build 5664)] on darwin >>>> Type "copyright", "credits" or "license()" for more information. >>> >>> The >>> prompt means you are already inside Python. >>> You can type Python commands at the >>> prompt, things like >>> >>>>>> print "Hello" >>> >>> But you cannot ruin a program from inside the >>> prompt (well, you can, >>> but >> its more complicated than sane people want to bother with! :-) >>> >>> You run a Python script from the OS Terminal prompt: >>> >>> $ python hello.py >>> >>>> Shouldn't I be able to run hello.py from the IDLE interpreter? >>> >>> You can't run it from the >>> prompt in IDLE but >>> What you can do is open the file for editing and then run that file using >> the menu commands, then the output will show up in the interpreter window. >>> >> I get how to do this now^^ >>> HTH, >>> >>> -- >>> Alan Gauld >>> Author of the Learn to Program web site >>> http://www.alan-g.me.uk/ >>> >>> >>> >>> ___ >>> 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] Running Existing Python
On Feb 26, 2011, at 3:18 PM, Corey Richardson wrote: > On 02/26/2011 04:10 PM, Justin Bonnell wrote: > >> --This is the location of the file: >> >> /jwbonnell/bin/Python 2.7/Extras/Demo/tkinter/guido/hello.py >> >> but it still says it cannot find the directory when I try to run it or cd to >> it. Is there any way that I can tell which directory the shell is currently >> working from? > > At the terminal, the command "pwd" , print working directory, should do > the trick. > > If you cannot cd to the directory, that's generally a pretty big hint > that the directory doesn't exist ;-) > > But yet you can see it in your file browser? That's most curious. --My current working directory is not what I have been trying to cd to, so I'm assuming that I am using the cd command wrong. I have tried: $ cd /jwbonnell/bin/Python\2.7/Extras/Demo/tkinter/guido $ cd /jwbonnell/bin/Python\2.7/Extras/Demo/tkinter/guido/hello.py $ cd /jwbonnell/bin/Python 2.7/Extras/Demo/tkinter/guido/hello.py > > -- > Corey Richardson > ___ > 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] textbook question
In trying to learn Python, I'm reading through How to Think Like a Computer
Scientist. I'm just on the third chapter but I'm getting stuck on this question:
Fill in the body of the function definition for cat_n_times so that it will
print the string, s, n times:
def cat_n_times(s, n):
Save this function in a script named import_test.py. Now at a unix prompt, make
sure you are in the same directory where the import_test.py is located ( ls
should show import_test.py). Start a Python shell and try the following:
>>> from import_test import *
>>> cat_n_times('Spam', 7)
SpamSpamSpamSpamSpamSpamSpam
If all is well, your session should work the same as this one. Experiment with
other calls to cat_n_times until you feel comfortable with how it works.
I'm thinking it should be pretty easy but, again, I'm a beginner.
I copied the whole question but basically I just need some help with what the
script should look like, that'd be great.___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
