Issue 1196: improve our examples
http://code.google.com/p/sympy/issues/detail?id=1196

Comment #7 by andy.terrel:
Do we need she-bangs for the examples?

We are depending on /usr/bin/env which does not always work, and I think it  
is confusing for a learner.  Having to type python is not really
all that difficult and we can depend on the user's documentation on using  
python to explain how to do that.

Do we need the iam_sympy_example module?

I assume this is to help someone run examples so they do not need to  
install sympy, but I don't know how reasonable this is.  If it is to
make the all script work well, I would suggest using a main function and  
then using the typical script caller.

def main(*args, *kws):
   do stuff

if __name__ == "__main__":
   main(*sys.argv[1:])

Then just calling each examples main, of course this might be a bit more  
confusing to a new user but I think its pretty well accepted and
works everywhere python works.



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