Python 関数で元の変数名を取得できますか?

<code class="python">import inspect

def foo(a, f, b):
    frame = inspect.currentframe()
    frame = inspect.getouterframes(frame)[1]
    string = inspect.getframeinfo(frame[0]).code_context[0].strip()
    args = string[string.find('(') + 1:-1].split(',')

    names = []
    for i in args:
        if i.find('=') != -1:
            names.append(i.split('=')[1].strip())

        else:
            names.append(i)

    print(names)

def main():
    e = 1
    c = 2
    foo(e, 1000, b=c)

main()</code>

['e', '1000', 'c']