类内的 Python 主调用 [英] Python main call within class

问题描述

我没有做过很多 python - 来自 C/Java 背景 - 所以请原谅我问这么简单的问题.我在 Eclipse 中使用 Pydev 来编写这个简单的程序，我想要它做的就是执行我的主要功能:

I haven't done much python - coming from a C/Java background - so excuse me for asking such a simple question. I am using Pydev in Eclipse to write this simple program, and all I want it to do is to execute my main function:

class Example():

if __name__ == '__main__':
    Example().main()        <----- What goes here?


    def main(self):     
        print "Hello World!

这就是我现在所拥有的.我也试过

That is what I have now. I have also tried

self.main() 

和

main()

和

main(self)

没有一个工作.我错过了什么?

none of which work. What am I missing?

推荐答案

嗯，首先，你需要真正定义一个函数，然后你才能运行它(而且它不需要被调用main).例如:

Well, first, you need to actually define a function before you can run it (and it doesn't need to be called main). For instance:

class Example(object):
    def run(self):
        print "Hello, world!"

if __name__ == '__main__':
    Example().run()

不过，您不需要使用类 - 如果您只想运行一些代码，只需将其放入函数中并调用该函数，或者将其放入 if 块:

You don't need to use a class, though - if all you want to do is run some code, just put it inside a function and call the function, or just put it in the if block:

def main():
    print "Hello, world!"

if __name__ == '__main__':
    main()

或

if __name__ == '__main__':
    print "Hello, world!"

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