如何循环 dict 并将该值用作对象的函数？

Question

我有一个值字典并初始化一个对象。字典值包含对象的所有模块，那么我怎样才能实现这样的目标呢？test_action = {    '1': 'addition',    '2': 'subtraction'}class test:    def __init__(self, a,b,c):        self.a = a        self.b = b        self.c = c    def addition(self):        return self.a + self.b + self.c    def subtraction(self):        return self.a - self.b - self.cdef main():    xxx = test(10,5,1)    for key,action in test_action.items():        print(xxx.action())

Answer 1

您应该将函数称为对象而不是字符串，以便：

class test:

    def __init__(self, a,b,c):

        self.a = a

        self.b = b

        self.c = c

    def addition(self):

        return self.a + self.b + self.c

    def subtraction(self):

        return self.a - self.b - self.c

test_action = {

    '1': test.addition,

    '2': test.subtraction

}

xxx = test(10,5,1)

for key, action in test_action.items():

    print(key, action(xxx))

会输出：

1 16

2 4

Answer 2

def main():

    xxx = test(10,5,1)

    for key,action in test_action.items():

        if hasattr(xxx, action):

            print "perforning: {}".format(action)

            print xxx.__getattribute__(action)()

#op

perforning: addition

16

perforning: subtraction

4