在python中使用def有多个参数

So in java you can do something like this if you don't know how many parameters you are going to get

所以在java中你可以做这样的事情，如果你不知道你将获得多少参数

private void testMethod(String... testStringArray){

}

How can I do something like this in python

我怎么能在python中做这样的事情

as I can't do something like this right?

因为我不能做这样的事情吧？

def testMethod(...listA):

2 个解决方案

#1

Are you talking about variable length argument lists? If so, take a look at *args, **kwargs.

你在谈论变长参数列表吗？如果是这样，看看* args，** kwargs。

See this Basic Guide and How to use *args and **kwargs in Python

请参阅本基本指南以及如何在Python中使用* args和** kwargs

Two short examples from [1]:

[1]中的两个简短例子：

Using *args:

使用* args：

def test_var_args(farg, *args):
    print "formal arg:", farg
    for arg in args:
        print "another arg:", arg

test_var_args(1, "two", 3)

Results:

结果：

formal arg: 1
another arg: two
another arg: 3

and using **kwargs (keyword arguments):

并使用** kwargs（关键字参数）：

def test_var_kwargs(farg, **kwargs):
    print "formal arg:", farg
    for key in kwargs:
        print "another keyword arg: %s: %s" % (key, kwargs[key])

test_var_kwargs(farg=1, myarg2="two", myarg3=3)

Results:

结果：

formal arg: 1
another keyword arg: myarg2: two
another keyword arg: myarg3: 3

Quoting from this SO question What do *args and **kwargs mean?:

引用这个问题* args和** kwargs是什么意思？：

Putting *args and/or **kwargs as the last items in your function definition’s argument list allows that function to accept an arbitrary number of anonymous and/or keyword arguments.

将* args和/或** kwargs作为函数定义的参数列表中的最后一项允许该函数接受任意数量的匿名和/或关键字参数。

#2

Sounds like you want:

听起来像你想要的：

def func(*args):
      # args is a list of all arguments

This like a lot of other such information is covered in the Python tutorial, which you should read.

Python教程中介绍了许多其他此类信息，您应该阅读这些信息。