Python相当于JavaScript函数对象。 [英] Python equivalent to JavaScript function object.

问题描述

我在JavaEE过去两年一直在开发fullstack。我想清除我的Python知识
所以我想知道是否有一个Python等效于这个JavaScript构造，我希望将涉及使用Python字典：

I have been developing fullstack for the last two years in JavaEE. I would like to dust off my Python knowledge so I would like to know if there is a Python equivalent to this JavaScript construct, that I supponse will involve using Python dictionaries:

var myFunctions = {
    'greet': function(name){
        return "Hello, " + name;
    },

    'farewell': function(time){
        return "See you " + time;
    }
}

所以我可以这样调用函数：

So I can call the functions this way:

let greetMarta = myFunctions['greet']("Marta");

推荐答案

您可以使用 lambda 定义非常简单的函数，如这些内联;但是它们只能由一个表达式组成：

You can use lambda to define very simple functions like these inline; however they can only consist of one expression:

my_functions = {
    'greet': lambda name: "Hello {}".format(name),
    'farewell': lambda time: "See you {}".format(time)
}

对于任何更复杂的东西，你需要定义一个独立的函数，然后在dict中引用它：

For anything more complicated you need to define a standalone function and then reference it in the dict:

def my_complex_function(param):
    ... logic ...
    return whatever

my_functions = {
    'complex_func': my_complex_function,
    ...
}

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