Use fire without editing code directly #29

Currently you have to add something like this to the end of your file just to mess around with fire:

if __name__ == '__main__':
    fire.Fire()

and then run with

python path/to/code.py

But it'd be neat if instead you could just do

fire path/to/code.py

and that does equivalent of exec appending the ifmain statement to the end.

Not sure how to do it - I know kernprof does some magic to inject into builtins before exec'ing code. (or maybe you get a code object back from exit) - but this would make fire even better as a debugging tool as well.