convert_seconds.py

# Function that takes as input a non-negative 
# number of seconds and returns a string of the form 
# '<integer> hours, <integer> minutes, <number> seconds' but
# where if <integer> is 1 for the number of hours or minutes, 
# then it should be hour/minute. Further, <number> may be an integer
# or decimal, and if it is 1, then it should be followed by second.

def convert_seconds(n):
    hours = n // 3600
    minutes = (n % 3600) // 60
    seconds = (n % 3600) % 60
    result = '{} hours, {} minutes, {} seconds'.format(int(hours), int(minutes), round(seconds,1))
    if hours == 1:
        result = result.replace('hours', 'hour')
    if minutes == 1:
        result = result.replace('minutes', 'minute')
    if seconds == 1:
        result = result.replace('seconds', 'second')
    return result

def main():
    print(convert_seconds(3661))
    #>>> 1 hour, 1 minute, 1 second

    print(convert_seconds(7325))
    #>>> 2 hours, 2 minutes, 5 seconds

    print(convert_seconds(7261.7))
    #>>> 2 hours, 1 minute, 1.7 seconds

    print(convert_seconds(2321))

if __name__ == '__main__':
    main()