Python: How to get argument's name runtime

问题

in Python: may be so obvious, :) anyway, we are looking for ?, below:

def printname(x):
   print ?,x

>>> a = 1.3
>>> printname(a)
>>> 'a',1.3

so something instead of ? to represent the name of passed argument.
if not that obvious ? any trick or solution?

回答1:

It's not impossible. You need to traverse back up stack frames and find the line of code that calls the function.

It's an ok hack to do for debugging, but no way I would use it in real code

Here's a starting point for you:

import inspect
def printname(x):
    print inspect.stack()[1][4]

a = 1.3
printname(a)

回答2:

You can't possibly know this. Objects don't know their names. They can have many names, or none at all, if they're simply an item in another object or list.

来源：https://stackoverflow.com/questions/16732955/python-how-to-get-arguments-name-runtime