getatter()通过方法名字符串调用方法，这个方法最主要的作用就是实现反射机制，也就是说可以通过字符串获取方法实例，这样就可以把一个类可能要调用的方法放到配置文件里，需要的时候进行动态加载。

1: 可以从类中获取属性和函数

新建test.py文件,代码如下:

# encoding:utf-8import sys class GetText(): def __init__(self): pass @staticmethod def A(): print("this is a staticmethod function") def B(self): print("this is a func") c = "cc desc" if __name__ == '__main__': print(sys.modules[__name__]) # <module '__main__' from 'D:/脚本项目/lianxi/clazz/test.py'> print(GetText) # <class '__main__.GetText'> # 获取函数 print(getattr(GetText, "A")) # <function GetText.A at 0x00000283C2B75798> # 获取函数返回值 getattr(GetText, "A")() # this is a staticmethod function getattr(GetText(), "A")() # this is a staticmethod function print(getattr(GetText, "B")) # <function GetText.B at 0x000001371BF55798> # 非静态方法不可用 # getattr(GetText, "B")() getattr(GetText(), "B")() # this is a func print(getattr(GetText, "c")) # cc desc print(getattr(GetText(), "c")) # cc desc

2:从模块中获取类(通过类名字符串得到类对象)

新建test1.py，代码如下:

#encoding:utf-8import sysimport testprint(sys.modules[__name__]) # 从模块中获取类对象class_name = getattr(test, "GetText")print(class_name) # <class 'test.GetText'> # 调用类的属性和函数print(getattr(class_name, "A")) # <function GetText.A at 0x000001D637365678># 获取函数返回值getattr(class_name, "A")() # this is a staticmethod functiongetattr(class_name(), "A")() # this is a staticmethod function print(getattr(class_name(), "B")) # <bound method GetText.B of <test.GetText object at 0x0000022D3B9EE348>># getattr(class_name, "B")() 非静态方法不可用getattr(class_name(), "B")() # this is a func # 获取属性值print(getattr(class_name, "c")) # cc descprint(getattr(class_name(), "c")) # cc desc

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