python利用字典保存配置实现动态调用模块类方法

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文件名：mytest,py

具体代码如下：

#coding=UTF-8class TestClass:    def sub(self,a,b):        return a-b    def add(self,a,b):        return a+b    def chen(self,a,b):        return a*bclass TestClassA:    def sub(self,a,b):        return a-b    def add(self,a,b):        return a+b    def chen(self,a,b):        return a*b    class TestClassB:    def sub(self,a,b):        return a-b    def add(self,a,b):        return a+b    def chen(self,a,b):        return a*b                sys_config={}sys_config["01"]=['mytest','TestClassA','add']sys_config["02"]=['mytest','TestClassA','sub']sys_config["03"]=['mytest','TestClassA','chen']sys_config["04"]=['mytest','TestClassB','add']sys_config["05"]=['mytest','TestClassB','sub']sys_config["06"]=['mytest','TestClassB','chen']def main():    class_name = "TestClass" #类名    module_name = "mytest"   #模块名    method = "chen"          #方法名    module = __import__(module_name) # import module    print "#module:",module    c = getattr(module,class_name)      print "#c:",c    obj = c() # new class    print "#obj:",obj    print(obj)    obj.chen(2,3)    mtd = getattr(obj,method)    print "#mtd:",mtd    print mtd(2,3) # call def        mtd_add = getattr(obj,"add")    t=mtd_add(1,2)    print "#t:",t    mtd_sub = getattr(obj,"sub")    print mtd_sub(2,1)            ywdm='02'        my_module_name=sys_config[ywdm][0]    my_class_name=sys_config[ywdm][1]    my_method_name=sys_config[ywdm][2]        my_module = __import__(my_module_name)    my_class = getattr(my_module,my_class_name)     my_obj = my_class()     my_method = getattr(my_obj,my_method_name)        print my_method(5,2)                                      if __name__ == '__main__':   main()

几个注意点：

1. 字典保存配置。

2. getattr方法的使用

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