是否有在静态方法中引用自己的类的简写?
假设我有这段代码:
class SuperLongClassName(object):
@staticmethod
def sayHi():
print 'Hi'
@staticmethod
def speak():
SuperLongClassName.sayHi() # Is there a shorthand?
是否有在静态方法中引用自己的类的简写?
假设我有这段代码:
class SuperLongClassName(object):
@staticmethod
def sayHi():
print 'Hi'
@staticmethod
def speak():
SuperLongClassName.sayHi() # Is there a shorthand?
是的,使用@classmethod
而不是@staticmethod
. 的全部要点@staticmethod
是如果您不需要它,请删除额外的类参数。
class SuperLongClassName(object):
@classmethod
def sayHi(cls):
print 'Hi'
@classmethod
def speak(cls):
cls.sayHi()
你可能想要一个classmethod
. 它像 a 一样工作staticmethod
,但将类作为隐式的第一个参数。
class Claaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaass(object):
@classmethod
def foo(cls):
print cls.__name__
Claaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaass.foo() # prints Claaa...
警告:
class Subclaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaass(
Claaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaass):
pass
Subclaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaass.foo() # prints Subclaaa...
或者,在模块级别为您的类定义一个较短的别名:
class Claaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaass2(object):
@staticmethod
def foo():
return _cls2
_cls2 = Claaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaass2
# prints True
print (Claaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaass2 is
Claaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaass2.foo())