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First solution in Clear category for Lightbulb Intro by Dunkleweizen
from datetime import datetime, timedelta
from typing import List
def sum_light(els: List[datetime]) -> int:
"""
how long the light bulb has been turned on
1. split the list into pairs
2. find the time between each member of each pair
3. add the times together
4. return the sum
"""
total_time = timedelta(0)
for i in range(0, len(els), 2):
total_time += (els[i+1] - els[i])
return total_time.total_seconds()
if __name__ == '__main__':
print("Example:")
print(sum_light([
datetime(2015, 1, 12, 10, 0 , 0),
datetime(2015, 1, 12, 10, 10 , 10),
datetime(2015, 1, 12, 11, 0 , 0),
datetime(2015, 1, 12, 11, 10 , 10),
]))
# These "asserts" are used for self-checking and not for an auto-testing
assert sum_light(els=[
datetime(2015, 1, 12, 10, 0 , 0),
datetime(2015, 1, 12, 10, 10 , 10),
]) == 610
assert sum_light([
datetime(2015, 1, 12, 10, 0 , 0),
datetime(2015, 1, 12, 10, 10 , 10),
datetime(2015, 1, 12, 11, 0 , 0),
datetime(2015, 1, 12, 11, 10 , 10),
]) == 1220
assert sum_light([
datetime(2015, 1, 12, 10, 0 , 0),
datetime(2015, 1, 12, 10, 10 , 10),
datetime(2015, 1, 12, 11, 0 , 0),
datetime(2015, 1, 12, 11, 10 , 10),
datetime(2015, 1, 12, 11, 10 , 10),
datetime(2015, 1, 12, 12, 10 , 10),
]) == 4820
assert sum_light([
datetime(2015, 1, 12, 10, 0 , 0),
datetime(2015, 1, 12, 10, 0 , 1),
]) == 1
assert sum_light([
datetime(2015, 1, 12, 10, 0 , 0),
datetime(2015, 1, 12, 10, 0 , 10),
datetime(2015, 1, 12, 11, 0 , 0),
datetime(2015, 1, 13, 11, 0 , 0),
]) == 86410
print("The first mission in series is completed? Click 'Check' to earn cool rewards!")
Aug. 17, 2021
