convert running pace in minutes per mile to minutes per km and distance of mile to km

pace_in_mile_to_km.py

#! /usr/python3
def pace_mi2km(minute_per_mile: str):
    # minute_a_mile: str, for example 10:19 (10minutes 19 seconds per mile)
    # return a str of minutes per km
    
    mile = 1.60934
    # convert pace mm:ss to second
    minute, second = minute_per_mile.split(':')[0].strip(), minute_per_mile.split(':')[1].strip()
    # print(minute, second)
    seconds = int(minute)*60 + int(second)
    pace_in_km = seconds / mile
    # convert back to mm:ss format
    minute = int(pace_in_km//60)
    second = int(pace_in_km%60)
    # minute: second per km
    return f"{str(minute).zfill(2)}:{str(second).zfill(2)}"

def mile2km(mile: float):
    mile_km = 1.60934
    return round(mile * mile_km,1)