time - Subtracting "variable[#]" with two digits in python? -

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i'm building script in python calculate amount of time in between hours entered user lets example did following

time = input("enter times:")

and user entered 3,11 show start time three, , end time 11. therefore, time equal 3,11. want able subtract show there 8 hour difference

i tried using

timesub= (int(time[3])-int(time[1]))

but gives me -2 because time[3] equal 1. how make use 11 instead of 1?

time_input = raw_input("enter times:") time_parts = time.split(',') time_diff = int(time_parts[1]) - int(time_parts[0])

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