undefined by Ouroboros Coding
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
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