def seconds_difference(time_1, time_2): """ (number, number) -> number
Return the number of seconds later that a time in seconds
time_2 is than a time in seconds time_1.
>>> seconds_difference(1800.0, 3600.0)
1800.0
>>> seconds_difference(3600.0, 1800.0)
-1800.0
>>> seconds_difference(1800.0, 2160.0)
360.0
>>> seconds_difference(1800.0, 1800.0)
0.0
"""
return time_2 - time_1
def hours_difference(time_1, time_2): """ (number, number) -> float
Return the number of hours later that a time in seconds
time_2 is than a time in seconds time_1.
>>> hours_difference(1800.0, 3600.0)
0.5
>>> hours_difference(3600.0, 1800.0)
-0.5
>>> hours_difference(1800.0, 2160.0)
0.1
>>> hours_difference(1800.0, 1800.0)
0.0
"""
return (time_2 / 3600) - (time_1 / 3600)
def to_float_hours(hours, minutes, seconds): """ (int, int, int) -> float
Return the total number of hours in the specified number
of hours, minutes, and seconds.
Precondition: 0 <= minutes < 60 and 0 <= seconds < 60
>>> to_float_hours(0, 15, 0)
0.25
>>> to_float_hours(2, 45, 9)
2.7525
>>> to_float_hours(1, 0, 36)
1.01
"""
return hours + (minutes / 60) + (seconds / 3600)
def to_24_hour_clock(hours): """ (number) -> number
hours is a number of hours since midnight. Return the
hour as seen on a 24-hour clock.
Precondition: hours >= 0
>>> to_24_hour_clock(24)
0
>>> to_24_hour_clock(48)
0
>>> to_24_hour_clock(25)
1
>>> to_24_hour_clock(4)
4
>>> to_24_hour_clock(28.5)
4.5
"""
return hours % 24
def get_hours(seconds): """ (int) -> int
seconds is the number of seconds since midnight. Return the number
of hours as seen on a 24-hour clock.
Precondition: seconds >= 0
>>> get_hours(3800)
1
>>> get_hours(3610)
1
>>> get_hours(7220)
2
>>> get_hours(11000)
3
"""
return to_24_hour_clock(seconds // 3600)
def get_minutes(seconds): """ (int) -> int
seconds is the number of seconds since midnight. Return the number of
minutes as seen on a clock.
Precondition: seconds >= 0
>>> get_minutes(3800)
3
>>> get_minutes(60)
1
"""
return (seconds % 3600) // 60
def get_seconds(seconds): """ (int) -> int
seconds is the number of seconds since midnight. Return the number of
seconds as seen on a clock.
Precondition: seconds >= 0
>>>get_seconds(3800)
20
"""
return seconds % 60
def time_to_utc(utc_offset, time): """ (number, float) -> float
Return time at UTC+0, where utc_offset is the number of hours away from
UTC+0.
>>> time_to_utc(+0, 12.0)
12.0
>>> time_to_utc(+1, 12.0)
11.0
>>> time_to_utc(-1, 12.0)
13.0
>>> time_to_utc(-11, 18.0)
5.0
>>> time_to_utc(-1, 0.0)
1.0
>>> time_to_utc(-1, 23.0)
0.0
"""
return to_24_hour_clock(time - utc_offset)
def time_from_utc(utc_offset, time): """ (number, float) -> float
Return UTC time in time zone utc_offset.
>>> time_from_utc(+0, 12.0)
12.0
>>> time_from_utc(+1, 12.0)
13.0
>>> time_from_utc(-1, 12.0)
11.0
>>> time_from_utc(+6, 6.0)
12.0
>>> time_from_utc(-7, 6.0)
23.0
>>> time_from_utc(-1, 0.0)
23.0
>>> time_from_utc(-1, 23.0)
22.0
>>> time_from_utc(+1, 23.0)
0.0
"""
return to_24_hour_clock(time + utc_offset)