Importing some functions from a py file

[Anthony Liu]

The choice is (b):

(b) you do have "def main()" as per my example, but
you have an unguarded "main()" at the top level

Below is exactly what I have:

def func1():
    do_sth_1()

def func2():
    do_sth_2()

def main():
    do sth_m()
#end of code1.py

So, you suggest that if I add to the end of code1.py
module the following,

if __name__ == "__main__":
    main()

I should be OK, right?





--- John Machin <sjmachin at lexicon.net> wrote:
> On Tue, 19 Apr 2005 19:13:13 -0700 (PDT), Anthony
> Liu
> <antonyliu2002 at yahoo.com> wrote:
> >I think I got confused by the python import
> facility.
> >Say, in code1.py I have func1, func2, func3 and
> main.
> >In code2.py, I *only* want to use func2 from
> code1.py.
> >So, I did
> >
> >from code1 import func2
> >
> >But every time, I run code2.py, the main() of
> code1.py
> >is run.
> >
> >I don't know why.  Any hint please?  Thanks.
> 
> *All* of code1.py is executed when you import all or
> parts of it.
> 
> code1.py should look something like this:
> ===
> import some, modules, maybe
> 
> def func1():
>     do_sth_1()
> 
> def func2():
>     do_sth_2()
> 
> def main():
>     do sth_m()
> 
> if __name__ == "__main__":
>     main()
> === 
> 
> The import, the defs, and the "if" and anything else
> you have at the
> top level are statements that are executed.
> 
> If you run code1.py as a script, the if test passes,
> and main() is
> invoked. Otherwise (you import all or bits of the
> code1 module), the
> if test fails, and main() is not invoked.
> 
> Possibilities: (a) In your real code1.py, you don't
> actually have "def
> main()", you have do_sth_m() at the top level, and
> it is being
> executed unconditionally (b) you do have "def
> main()" as per my
> example, but you have an unguarded "main()" at the
> top level (c)
> something that we can't guess -- you may have to
> post a more detailed 
> description (cut-down version of the actual code
> would be a good
> idea!).
> 
> HTH,
> John
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 


		
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