How to find out the default values of a particular function's argument in another function in Python?

Question

Let\'s suppose we have a function like this:

def myFunction(arg1=\'a default value\'):
  pass

We can use introspection to find out the name

Answer 1

If you define a function f like this:

>>> def f(a=1, b=True, c="foo"):
...     pass
...

in Python 2, you can use:

>>> f.func_defaults
(1, True, 'foo')
>>> help(f)
Help on function f in module __main__:
f(a=1, b=True, c='foo')

whereas in Python 3, it's:

>>> f.__defaults__
(1, True, 'foo')
>>> help(f)
Help on function f in module __main__:
f(a=1, b=True, c='foo')