静态方法如何在Python中访问类变量?
这是我的代码看起来像
class InviteManager():
ALREADY_INVITED_MESSAGE = "You are already on our invite list"
INVITE_MESSAGE = "Thank you! we will be in touch soon"
@staticmethod
@missing_input_not_allowed
def invite(email):
try:
db.session.add(Invite(email))
db.session.commit()
except IntegrityError:
return ALREADY_INVITED_MESSAGE
return INVITE_MESSAGE
当我运行我的测试时,我看到了
NameError: global name 'INVITE_MESSAGE' is not defined
如何访问INVITE_MESSAGE
里面@staticmethod
?
您可以将其作为InviteManager.INVITE_MESSAGE
访问,但更InviteManager.INVITE_MESSAGE
解决方案是将静态方法更改为类方法:
@classmethod
@missing_input_not_allowed
def invite(cls, email):
return cls.INVITE_MESSAGE
(或者,如果你的代码看起来很简单,你可以用模块中的一堆函数和常量替换整个类,模块是命名空间。)
尝试:
class InviteManager():
ALREADY_INVITED_MESSAGE = "You are already on our invite list"
INVITE_MESSAGE = "Thank you! we will be in touch soon"
@staticmethod
@missing_input_not_allowed
def invite(email):
try:
db.session.add(Invite(email))
db.session.commit()
except IntegrityError:
return InviteManager.ALREADY_INVITED_MESSAGE
return InviteManager.INVITE_MESSAGE
InviteManager
处于静态方法的范围内。
您可以使用InviteManager.INVITE_MESSAGE
和InviteManager.ALREADY_INVITED_MESSAGE
访问您的属性,而无需更改其声明中的任何内容。
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