装饰器,把多个函数绑在一起组成一个泛函数
函数的使用
from functools import singledispatch from collections import abc @singledispatch def show(obj): print (obj, type(obj), "obj") #参数字符串 @show.register(str) def _(text): print (text, type(text), "str") #参数int @show.register(int) def _(n): print (n, type(n), "int") #参数元祖或者字典均可 @show.register(tuple) @show.register(dict) def _(tup_dic): print (tup_dic, type(tup_dic), "int") show(1) show("xx") show([1]) show((1,2,3)) show({"a":"b"})
1 <class 'int'> int
xx <class 'str'> str
[1] <class 'list'> obj
(1, 2, 3) <class 'tuple'> int
{'a': 'b'} <class 'dict'> int
类中使用
from functools import singledispatch class abs: def type(self,args): "" class Person(abs): @singledispatch def type(self,args): super().type("",args) print("我可以接受%s类型的参数%s"%(type(args),args)) @type.register(str) def _(text): print("str",text) @type.register(tuple) def _(text): print("tuple", text) @type.register(list) @type.register(dict) def _(text): print("list or dict", text) Person.type("safly") Person.type((1,2,3)) Person.type([1,2,3]) Person.type({"a":1}) Person.type(Person,True)
str safly tuple (1, 2, 3) list or dict [1, 2, 3] list or dict {'a': 1} 我可以接受<class 'bool'>类型的参数True
本文来自博客园,作者:孙龙-程序员,转载请注明原文链接:https://www.cnblogs.com/sunlong88/articles/singledispatch.html