python 重载内置函数吗

from functools import singledispatch

@singledispatch

def show(obj):

    print (obj, type(obj), "obj")

@show.register(str)

def _(text):

    print (text, type(text), "str")

@show.register(int)

def _(n):

    print (n, type(n), "int")

show(1)

show("xx")

show([1])

1 <class 'int'> int

xx <class 'str'> str

[1] <class 'list'> obj