反射

1.反射：由字符串反向找变量、函数、类

案例：通过字符串反射类

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("{}在白日做梦!".format(self.name))


s = "person"
# 首字母要大写
s = s.capitalize()
print(s, type(s))

# 打印当前可用的变量
print(locals()['s'])
print(locals().get("s"))

# 反射
if hasattr(sys.modules[__name__], s):
    print("找到了")
    the_class = getattr(sys.modules[__name__], s)

    print(the_class)
    obj = the_class(name="张三")
    obj.eat("炒花甲")