作用域与 global — 计算机填空题
题目
阅读以下 Python 代码，填写运行后 result 的值。
```python
token = "外"
def inspect():
token = "局"
def mutate():
global token
token = token + "全"
return token
before = token
after = mutate()
return before, after, token
result = inspect()
```
result = ____