ins_test.py

"""
>>> sort([4,2,4,3,6,1])
[1, 2, 4, 4, 6]
"""
def sort(a):
    return a

output

➜  insertion-sort  python -m doctest ins_sort.py
**********************************************************************
File "ins_sort.py", line 2, in ins_sort
Failed example:
    sort([4,2,4,3,6,1])
Expected:
    [1, 2, 4, 4, 6]
Got:
    [4, 2, 4, 3, 6, 1]
**********************************************************************
1 items had failures:
   1 of   1 in ins_sort
***Test Failed*** 1 failures.