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O'REILLY - "Lightbulb End Watching" solution in Uncategorized category for Lightbulb End Watching by jsg-inet
from datetime import datetime
from typing import List, Optional
def sum_light(els: List[datetime], start_watching: Optional[datetime] = None, end_watching: Optional[datetime] = None) -> int:
"""
how long the light bulb has been turned on
"""
# The procedure used is similar to previous misssion "Lightbulb Start Watching"
# A complete description can be found there.
# Here we made the same process:
# 1) Append to "els" the time watch event (start or end).
# 2) Order the list "els".
# 3) Obtain the index where the watch event is placed
# 4) Calculate the cut point depending if the index is odd or even
# 5) Cut the list on this point
# In this mission we repeat it 2 times (with a little differences)
# One for start_watching and one more for end_watching
# Finally we send the result to the internal function and return the value obtained.
def total_light_on (on_off_list: List[datetime]) -> int:
return int(sum((off - on).total_seconds() for on,off in zip(on_off_list[0::2],on_off_list[1::2])))
time_ini_index=0
time_end_index=len(els)
if start_watching != None:
els.append(start_watching)
els.sort()
print(els)
if els.index(start_watching)%2:
time_ini_index=els.index(start_watching)
else:
time_ini_index=els.index(start_watching)+1
els=els[time_ini_index:]
print(els)
if end_watching != None:
els.append(end_watching)
els.sort()
print(els)
if els.index(end_watching)%2:
time_end_index=els.index(end_watching)+1
else:
time_end_index=els.index(end_watching)
print(els)
print(time_end_index)
print(els[:time_end_index])
print(total_light_on(els[:time_end_index]))
return total_light_on(els[:time_end_index])
if __name__ == '__main__':
print("Example:")
print(sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
],
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10)))
assert sum_light(els=[
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
],
start_watching=datetime(2015, 1, 12, 10, 0, 0),
end_watching=datetime(2015, 1, 12, 10, 0, 10)) == 10
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
],
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 7)) == 7
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
],
datetime(2015, 1, 12, 10, 0, 3),
datetime(2015, 1, 12, 10, 0, 10)) == 7
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
datetime(2015, 1, 12, 10, 0, 10),
],
datetime(2015, 1, 12, 10, 0, 10),
datetime(2015, 1, 12, 10, 0, 20)) == 0
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, 10, 30, 0),
datetime(2015, 1, 12, 11, 0, 0)) == 0
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, 10, 10, 0),
datetime(2015, 1, 12, 11, 0, 0)) == 10
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, 10, 10, 0),
datetime(2015, 1, 12, 11, 0, 10)) == 20
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, 9, 50, 0),
datetime(2015, 1, 12, 10, 0, 10)) == 10
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, 9, 0, 0),
datetime(2015, 1, 12, 10, 5, 0)) == 300
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, 5, 0),
datetime(2015, 1, 12, 12, 0, 0)) == 310
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, 5, 0),
datetime(2015, 1, 12, 11, 10, 0)) == 300
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, 10, 10, 0),
datetime(2015, 1, 12, 11, 0, 10)) == 20
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, 9, 10, 0),
datetime(2015, 1, 12, 10, 20, 20)) == 610
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
],
datetime(2015, 1, 12, 9, 10, 0),
datetime(2015, 1, 12, 10, 20, 20)) == 1220
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
],
datetime(2015, 1, 12, 9, 9, 0),
datetime(2015, 1, 12, 10, 0, 0)) == 0
assert sum_light([
datetime(2015, 1, 12, 10, 0, 0),
],
datetime(2015, 1, 12, 9, 9, 0),
datetime(2015, 1, 12, 10, 0, 10)) == 10
print("The third mission in series is completed? Click 'Check' to earn cool rewards!")
June 23, 2021
