# -*- coding:utf-8 -*-
import sys


class Person(object):
    def __init__(self, name):
        self.name = name

    def eat(self, food):
        print("{} 在吃 {}".format(self.name, food))

    def dream(self):
        print("{}在做梦!".format(self.name))


s = "person"           # 字符串不能被修改，可以重新赋值
s = s.capitalize()     # 首字母大写
print(locals())        # 当前文件里可用的变量(是一个字典)
print(locals().get("s"))
print(s)

if hasattr(sys.modules[__name__], s):
    a_class = getattr(sys.modules[__name__], s)
    print("--", a_class)
    obj = a_class(name="Lin")  # 实例化
    obj.eat("龙虾")


def func():
    a = 10
    b = 15
    print(locals())  # 只打印函数体里的所有变量


func()