python-反射
反射:
-
getattr,去对象中获取成员
v1 = getattr(对象,"成员名称") v2 = getattr(对象,"成员名称", 不存在时的默认值)
-
setattr,去对象中设置成员
setattr(对象,"成员名称",值)
-
hasattr,对象中是否包含成员
v1 = hasattr(对象,"成员名称") # True/False
-
delattr,删除对象中的成员
delattr(对象,"成员名称")
反射示例:
class Person(object):
def __init__(self, name, age):
self.name = name
self.age = age
def show(self):
message = "姓名{},年龄:{}".format(self.name, self.age)
return message
user_object = Person("yy", "11")
# 对象.成员 的格式去获取数据
print(user_object.name) # yy
print(user_object.age) # 11
print(user_object.show()) # 姓名yy,年龄:11
## 反射获取
print(getattr(user_object,"name")) # yy
print(getattr(user_object,"age")) # 11
method = getattr(user_object,"show")
print(method()) # 姓名yy,年龄:11
# setattr 设置成员
setattr(user_object, "name", "zz")
print(getattr(user_object,"name")) #zz