如何获取 Python 函数的源代码?

问题描述：

假设我有一个定义如下的 Python 函数:

Suppose I have a Python function as defined below:

def foo(arg1,arg2):
    #do something with args
    a = arg1 + arg2
    return a

我可以使用 foo.func_name 获取函数的名称.我如何以编程方式获取其源代码，正如我在上面输入的那样?

I can get the name of the function using foo.func_name. How can I programmatically get its source code, as I typed above?

答

如果函数来自文件系统上可用的源文件，则 inspect.getsource(foo) 可能有帮助:

If the function is from a source file available on the filesystem, then inspect.getsource(foo) might be of help:

如果 foo 定义为:

def foo(arg1,arg2):         
    #do something with args 
    a = arg1 + arg2         
    return a

那么:

import inspect
lines = inspect.getsource(foo)
print(lines)

def foo(arg1,arg2):         
    #do something with args 
    a = arg1 + arg2         
    return a

但我相信，如果函数是从字符串、流编译或从编译文件导入的，那么您将无法检索其源代码.

But I believe that if the function is compiled from a string, stream or imported from a compiled file, then you cannot retrieve its source code.