undefined: A value to use as a default value to indicate an argument was absolutely not set buy the user of the method. Will not match as true to any other value but itself.

pip install undefined-oc

import undefined

def print_me(value = undefined):
  if value is undefined:
    print('Please pass a value to print')
  else:
    print(value)

>>> print_me('hello, there')
hello, there
>>> print_me(None)
None
>>> print_me([])
[]
>>> print_me()
Please pass a value to print