python利用字典保存配置实现动态调用模块类方法
文件名：mytest,py
具体代码如下：
#coding=UTF-8
class TestClass:
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 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
