python - 引用与 Python 中的局部变量同名的全局变量

Question

我是 python 新手，我们如何引用与本地变量同名的全局变量。

spam = 'global spam'
def scope_test():
    spam = 'local spam'
    print(spam)
    # access global spam and print or assign to the local spam
    # print(global.spam)
    # local.spam = global.spam (something like this)

scope_test()

Answer 1

这是不推荐的，如果你好奇问/做，我只是为了回答:

Python 3.5.2 
>>> spam = 'global spam'
>>> def scope_test(): 
..     spam = 'local spam' 
..     print(spam) 
..     # access global spam and print or assign to the local spam 
..     print(globals()['spam']) 
..     spam = globals()['spam'] 
..     print(spam) 
..     
>>> scope_test()

输出:

local spam
global spam
global spam