Which dispatcher will be called

which_dispatcher.py

from functools import singledispatch


@singledispatch
def fancy_print(s):
    raise NotImplementedError


@fancy_print.register(int)
def _ints(s):
    print(s * 2)


@fancy_print.register(list)
def _lists(s):
    for i, e in enumerate(s):
        print(i, e)


@fancy_print.register(float)
def _floats(s):
    print(round(s, 2))


print(fancy_print.dispatch(int))
print(fancy_print.dispatch(list))
print(fancy_print.dispatch(float))
print(fancy_print.dispatch(dict))