Learning python parameters. Curious how to do a mix of arguments, with *args, keyword arguments with *kwargs

python_fn_parameters.py

#!/usr/local/bin/python3
### Chris. Fauerbach.
### MIT License.
### Most flexible callback method signature if you have 
### required and commonly expected keyword arguments

# fn
# callback is a required argument 
# *args is everything optional
# counter is a named argument with a default value
# **kwargs is a way to get ANY other keyword arguments
def fn(callback, *args, counter=0, **kwargs):
  print("-----------------")
  print("fn: ", callback)
  print(args)
  print(kwargs)
  print(kwargs['fake'])

if __name__ == "__main__":
  fn("dog", fake="one")
  """
-----------------
fn:  dog
()
{'fake': 'one'}
one
"""
  fn("cat", "one", "two", fake='fake', counter=10, undefined=12)
  """
-----------------
fn:  cat
('one', 'two')
{'fake': 'fake', 'undefined': 12}
fake
"""
  fn("heather","another", fake="one")
  """
-----------------
fn:  heather
('another',)
{'fake': 'one'}
one
"""
  fn("frankenstein", fake="one")
  """
-----------------
fn:  frankenstein
()
{'fake': 'one'}
one
"""