On Wed, Jul 28, 2010 at 2:39 AM, Kevin Rapley <ke...@digikev.co.uk> wrote:
>
>>> I am running Mac OSX v10.6.4 Snow Leopard
>>> I am running Python 2.6.1
>>
>> In general get the MacPython distributions of Python etc, they usually
>> install easier (ie from the GUI) than the "Unix" based versions.
>
> Okay, thanks. I will look into that.
>>>
>>> 1. How do I execute .py files in the command line shell? I have my
>>> files in /Users/Kevin/python-exercises/ and am opening python in
>>> shell from that directory
>>
>> There are numerous ways, especially in MacOS.
>> The simplest way is to put a "shebang" line at the top of your script
>> and then make them executable:
>>
>> $ cat>  myscript.py
>
> What is the significance of this and how do I use it? I guess this is a
> command to add in to Shell, however when I use this I get the following
> error:
>
>>>> cat > tryme1.py
> Traceback (most recent call last):
>  File "<stdin>", line 1, in <module>
> NameError: name 'cat' is not defined
>>
>> #! /bin/env python
>
> With my configuration, I am guessing I need to change this snippet to:
>
> #! /opt/local/Library/Frameworks/Python.framework/Versions/2.6/bin python
>>
>> # the above line must be the first line in your file and tells the
>> # shell where to find python
>> # rest of your code follows.....
>>
>> Then use chmod +x to make it executable
>>
>> $ chmod +x myscript.py
>
> When I try to run this with one of my files I get the following error:
>
>>>> chmod +x tryme1.py
>  File "<stdin>", line 1
>    chmod +x tryme1.py
>                  ^
> SyntaxError: invalid syntax
>>
>> Now you can run it:
>>
>> $ myscript.py
>>
>> Alternatively you can just call python explicitly:
>>
>> $ python myscript.py
>
> I get a syntax error doing this too:
>
>>>> python tryme1.py
>  File "<stdin>", line 1
>    python tryme1.py
>                ^
> SyntaxError: invalid syntax
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It looks like you're trying to type it into the python prompt, when
you should be trying to type it into the shell command prompt. You can
import tryme1.py in the python shell/interpreter, but you python
tryme.py from the shell
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