Python Function Design Recipe

1. Write example uses. Dont add extra spaces before/after the output

	"""
    >>> 	testfunc(2)
	2
    >>> 	testfunc(5)
	5
	"""

2. Write function header and add the Python Docstring immediately after the header. Ensure there is a Precondition

def testfunc(input : int) -> int:
	"""
	returns the input function
    >>> 	testfunc(2)
	2
    >>> 	testfunc(5)
	5
	"""

The header can have a Return Annotation, but it is not required

1. Write function description

def testfunc(input):
	""" returns the user's input
	returns the input function
    >>> 	testfunc(2)
	2
    >>> 	testfunc(5)
	5
	"""

4. Write the body

def testfunc(input):
	"""
	returns the input function
    >>> 	testfunc(2)
	2
    >>> 	testfunc(5)
	5
	"""
	return input

5. Test the function with Python Doctest