从Python中调用名称空间获取本地人 [英] Get locals from calling namespace in Python

问题描述

我想从一个调用函数中从Python检索局部变量.有什么办法吗?我意识到这不适用于大多数编程，但是我基本上是在构建调试器.例如:

I want to retrieve the local variables from Python from a called function. Is there any way to do this? I realize this isn't right for most programming, but I am basically building a debugger. For example:

def show_locals():
  # put something in here that shows local_1.

local_1 = 123
show_locals()  # I want this to show local_1.

我应该在show_locals的正文中放入什么?如果必须修改调用语句，我可以做的最小修改是什么?

What do I put in the body of show_locals? If I have to modify the calling statement, what is the minimal modification I can make?

注意:当show_locals与其调用者所在的模块位于不同的模块中时，此方法必须起作用.

Note: this must work when show_locals is in a different module to its caller.

推荐答案

如果要编写调试器，则需要大量使用

If you're writing a debugger, you'll want to make heavy use of the inspect module:

def show_callers_locals():
    """Print the local variables in the caller's frame."""
    import inspect
    frame = inspect.currentframe()
    try:
        print(frame.f_back.f_locals)
    finally:
        del frame

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