Check Overlap Problem

check_overlap.py

from datetime import datetime

def check_overlap(input):
    return True

case1 = [
    (datetime(2018, 3, 10, 11, 0), datetime(2018, 3, 10, 13, 0)),
    (datetime(2018, 3, 10, 14, 0), datetime(2018, 3, 10, 15, 0)),
    (datetime(2018, 3, 10, 12, 0), datetime(2018, 3, 10, 13, 30))
]

case2 = [
    (datetime(2018, 3, 10, 11, 0), datetime(2018, 3, 10, 13, 0)),
    (datetime(2018, 3, 10, 14, 0), datetime(2018, 3, 10, 15, 0)),
    (datetime(2018, 3, 10, 16, 0), datetime(2018, 3, 10, 17, 30))
]

case3 = [
    (datetime(2018, 3, 10, 11, 0), datetime(2018, 3, 10, 11, 10)),
    (datetime(2018, 3, 10, 11, 20), datetime(2018, 3, 10, 11, 30)),
    (datetime(2018, 3, 10, 11, 50), datetime(2018, 3, 10, 11, 55))
]

case4 = [
    (datetime(2018, 3, 10, 11, 0), datetime(2018, 3, 10, 11, 10)),
    (datetime(2018, 3, 10, 11, 20), datetime(2018, 3, 10, 11, 30)),
    (datetime(2018, 3, 10, 11, 25), datetime(2018, 3, 10, 11, 29))
]


assert check_overlap(case1) is True, 'Answer for Case 1 should be True'
assert check_overlap(case2) is False, 'Answer for Case 2 should be False'
assert check_overlap(case3) is False, 'Answer for Case 3 should be False'
assert check_overlap(case4) is True, 'Answer for Case 4 should be True'