function help

[Gribouillis]

Extending on bowlofred's code, you could use an extensible dictionary of units expressed in the International System of Units and use it to convert from one unit to an other.

_si = {
    'hour': 3600,
    'minute': 60,
    'second': 1,
    'millisecond': 1e-3,
    'microsecond': 1e-6,
}

def as_si(unit, value=1):
    return _si[unit] * value

def set_si(unit, value):
    _si[unit] = value

set_si('day', 24 * as_si('hour'))
set_si('year', 365.25 * as_si('day'))

def conversion(value, from_unit, to_unit):
    return as_si(from_unit, value)/as_si(to_unit)

if __name__ == '__main__':
    number = 3
    u1 = 'hour'
    u2 = 'minute'
    ans = conversion(number, u1, u2)
    print(f'There are {ans} {u2} in {number} {u1}')