Let's make this a little easier on ourselves and just use a module...
Try: pip install compago
Then write:
import compago
app = compago.Application()
@app.command
def hello():
print "hi there!"
@app.command
def goodbye():
print "see ya later."
if __name__ == "__main__":
app.run()
Then use like so:
$ python test.py hello
hi there!
$ python test.py goodbye
see ya later.
Note: There's a bug in Python 3 at the moment, but works great with Python 2.
Edit: An even better option, in my opinion is the module fire by Google which makes it easy to also pass function arguments. It is installed with pip install fire. From their GitHub:
Here's a simple example.
import fire
class Calculator(object):
"""A simple calculator class."""
def double(self, number):
return 2 * number
if __name__ == '__main__':
fire.Fire(Calculator)
Then, from the command line, you can run:
python calculator.py double 10 # 20
python calculator.py double --number=15 # 30