Python Doctest

To test functions. If a function is written using the Python Function Design Recipe and has >>> segments in the Python Docstring, then doctest will test to see if the result of the command is the same as the result written.

Using Doctest

import doctest
doctest.testmod()

Viewing All Outputs

python ./myfile.py -v

Example Test

def length(lst: list) -> int:
    """Return the number of elements (top level) in lst.
	>>> length([1,2,3]) 
	3
    """
    if (lst == []):
        return 0
    return 1 + length(lst[1:])