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Python方法放置
原标题:Python Method Placement
  • 时间:2010-10-14 20:50:48
  •  标签:
  • python

有人能给我一个解决方案吗

dosomething()

def dosomething():
    print  do something 

我不希望我的方法定义在文件的顶部,有办法解决这个问题吗?

最佳回答

“标准”方法是在文件顶部的main函数内执行操作,然后在底部调用main()。例如。

def main():
    print  doing stuff 
    foo()
    bar()

def foo():
    print  inside foo 

def bar():
    print  inside bar 

if __name__ ==  __main__ :
    main()

ifif__name__==__main__:部分确保在文件导入另一个python程序时不会调用main(),而仅在文件直接运行时调用。

当然,“main”并不意味着什么。。。(不过,__main__确实如此!)这是一个psuedo约定,但您也可以将其称为do_stuff,然后在底部设置if __name__==__main__:do_stuff()

编辑:您可能还想查看Guido关于编写mains的建议。此外,Daenyth提出了一个很好的观点(并击败了我的回答):你应该这样做的原因不是“标准的”,甚至不是因为它允许你在“main”代码下面定义函数。你应该这么做的原因是它鼓励你编写模块化和可重用的代码。

问题回答

除了将dosomething的定义添加到单独的文件中并导入外:

from my_module import dosomething

dosomething()

我不相信还有别的办法。。。但我可能错了。





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