On 3/24/2017 9:11 AM, Bob Gailer wrote:
On Mar 24, 2017 4:53 AM, "john polo" <jp...@mail.usf.edu
<mailto:jp...@mail.usf.edu>> wrote:
>
> Greetings,
> I am attempting to learn Python. I have no programming background.
I'm on a computer with Windows 7. I checked the PATH in System
Variables and Python and Python\Scripts are in the path. I have a
book, Python for Biologists and it supplies example scripts, one is
called comment.py. The output from comment.py is
>
> Comments are very useful!
>
> I use cd to get to the directory with the example scripts
We can assume you are at a Windows command prompt. It' a good idea too
tell us that, so we don't have to assume!
and open a command prompt with "python" and get the prompt.
Assumptions / terminology again! Typing "python" normally invokes the
python interpreter. Since you did not pass any arguments you get a
window displaying the python interpreter prompt (>>>).
I type
>
> "python comment.py"
>
> and get
>
> " File "<stdin>", line 1
> python comment.py
> ^
> SyntaxError: invalid syntax
It is great (as John said) that you provided the traceback. It would
have been even greater if you had given us the rest e.g,
Microsoft Windows [Version 10.0.14393]
(c) 2016 Microsoft Corporation. All rights reserved.
C:\Users\bgailer>cd /examples
C:\examples>python
Python 3.3.5 (v3.3.5:62cf4e77f785, Mar 9 2014, 10:35:05) [MSC v.1600
64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> python comment.py
File "<stdin>", line 1
python comment.py
^
SyntaxError: invalid syntax
>>>
Which brings up one other important matter: when writing us also tell
us which python version you are using. In my example it is 3.3.5.
I'm using 3.6.0.
>
> Sorry, I realize this may not all line up like it does when I'm
typing this in the email. The caret/error pointer is under the t in
comment. I am not sure what is causing this error.
>
> If I type
>
> "import comment.py"
>
> the output is
>
> "Comments are very useful!
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> ModuleNotFoundError: No module named 'comment.py'; 'comment'
> "
>
> If I use IDLE shell:
>
> "python comment.py"
>
> "SyntaxError: invalid syntax"
>
> I know I can open the file in the editor and use F5, but shouldn't I
be able to use a command from shell? How do I run comment.py from a
command line without error? Or is that not possible?
>
> cheers,
> John
> --
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