python getatrra（）

getattr(object, name[, default])
Return the value of the named attribute of object. name must be a string. If the string is the name of one of the object’s attributes, the result is the value of that attribute. For example, getattr(x, ‘foobar’) is equivalent to x.foobar. If the named attribute does not exist, default is returned if provided, otherwise AttributeError is raised.
返回对象的命名属性的值。名称必须是字符串。如果字符串是对象属性之一的名称，则结果是该属性的值。