在python的一个类中具有相同名称的方法? [英] Methods with the same name in one class in python?

问题描述

如何在一个类中声明很少几个具有相同名称，但具有不同数量的参数或不同类型的方法?

How to declare few methods with the same name ,but with different numbers of parameters or different types in one class?

在本课中我必须更改的内容:

What I must to change in this class:

class MyClass:
    """"""

    #----------------------------------------------------------------------
    def __init__(self):
        """Constructor"""
    def my_method(self,parameter_A_that_Must_Be_String):
        print parameter_A_that_Must_Be_String

    def my_method(self,parameter_A_that_Must_Be_String,parameter_B_that_Must_Be_String):
        print parameter_A_that_Must_Be_String
        print parameter_B_that_Must_Be_String

    def my_method(self,parameter_A_that_Must_Be_String,parameter_A_that_Must_Be_Int):
        print parameter_A_that_Must_Be_String * parameter_A_that_Must_Be_Int

推荐答案

您可以使用一个函数，该函数接受可变数量的参数.

You can have a function that takes in variable number of arguments.

def my_method(*args, **kwds):
    # do something

# when you call the method
my_method(a1, a2, k1=a3, k2=a4)

# you get: 
args = (a1, a2)
kwds = {'k1':a3, 'k2':a4}

因此，您可以按以下方式修改函数:

So you can modify your function as follows:

def my_method(*args):
    if len(args) == 1 and isinstance(args[0], str):
        # case 1
    elif len(args) == 2 and isinstance(args[1], int):
        # case 2 
    elif len(args) == 2 and isinstance(args[1], str):
        # case 3

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