locals()

Posted 2021-02-03 pzk7788

locals() 有两种情况：

(1) 如果在函数内部使用 locals()，那么会以字典的形式返回函数内部定义的变量，如下例1
(2) 如果在函数外部使用 locals()，那么会以字典的形式返回全局变量和内置变量，如下例2

[[email protected] ~]$ cat 1.py
#!/usr/bin/env python

def fun():
    x = 10
    y = 20
    print locals()

fun()

[[email protected] ~]$ python 1.py
{‘y‘: 20, ‘x‘: 10}

 

[[email protected] ~]$ cat 2.py
#!/usr/bin/env python

a = 10
b = 20

def fun():
    c = 30
    d = 40

fun()
print locals()

[[email protected] ~]$ python 2.py
{‘a‘: 10, ‘b‘: 20, ‘__builtins__‘: <module ‘__builtin__‘ (built-in)>, ‘__file__‘: ‘2.py‘, 
‘__package__‘: None, ‘fun‘: <function fun at 0x7f849af41de8>, ‘__name__‘: ‘__main__‘, ‘__doc__‘: None}