python文字列タイプの関数名で関数を呼び出す

def func():
    print("hello world")


if __name__ == '__main__':
    str01 = "func"
    str_2_func = eval(str01)
    str_2_func()  # hello world
    print(type(str_2_func))  # 

def func01():
    print("hello world func01")


def func02():
    print("hello world func02")


if __name__ == '__main__':
    locals()['func01']()  # hello world func01
    globals()['func02']()  # hello world func02

# python     ，getattr(object,name)   object.name

class A(object):
    def to_eat(self):
        print("eat")

    def to_sleep(self):
        print("sleep")


if __name__ == "__main__":
    a = A()
    #   1：object   
	#   2：name          
    func01 = getattr(a, "to_eat")
    func01()
    func02 = getattr(a, "to_sleep")
    func02()

#    operator  methodcaller  ，             AttributeError  

from operator import methodcaller


class A(object):
    def func(self):
        print("func")


if __name__ == '__main__':
    a = A()
    # methodcaller(         )(    )
    methodcaller("func")(a)