如何在Class中定義帶有值的變量以及如何在其他Class中使用

Question

外面有變數。 正確的類功能需要變量。 如何在類中移動它並在其他類中使用它？

這工作不錯，但我需要移動STATUS_CHOICES類內部UserDevice和使用STATUS_CHOICES內UserDeviceAdmin了。

STATUS_CHOICES = ((0, gettext("disabled")), (1, gettext("allowed")))

class UserDevice(BaseModel):
    """Table with all devices added and owned by users."""

    device_uniqueid = CharField(primary_key=True)
    device_user = ForeignKeyField(User, null=True, backref='userdevices')
    device_name = CharField()
    model = CharField()
    phone = CharField()
    status = IntegerField(choices=STATUS_CHOICES, default=1)
    inserted_at = DateTimeField(null=True)

    def myfunc(self):
        return self.a

class UserDeviceAdmin(ModelView):
    can_create = False
    edit_modal = True
    column_choices = {'status': STATUS_CHOICES}
    column_list = [
        'device_uniqueid',
        'device_user.email',
        'device_name',
        'model',
        'phone',
        'status',
        'inserted_at',
    ]
    column_sortable_list = ('device_uniqueid', 'device_user.email')
    form_ajax_refs = {'device_user': {'fields': ['email']}}

Answer 1

您應該考慮使用可以繼承的父類，由於多重繼承，這在python中很容易：

class Parent_class(object):
    def get_status_choices(self):
        return ((0, gettext("disabled")), (1, gettext("allowed")))


class UserDevice(BaseModel, Parent_class):
    # your implementation...
    status = IntegerField(choices=self.get_status_choices(), default=1)
    # and further implementations....

class UserDeviceAdmin(ModelView, Parent_class):
    # your implementation...
    column_choices = {'status': self.get_status_choices()}
    # and further implementations....

請注意，您最好將父類的名稱更改為域中相關的名稱

Answer 2

把它移到里面：

class UserDevice(BaseModel):
    """Table with all devices added and owned by users."""
    STATUS_CHOICES = ((0, gettext("disabled")), (1, gettext("allowed")))

從其他類訪問它：

class UserDeviceAdmin(ModelView):
    can_create = False
    edit_modal = True
    column_choices = {'status': UserDevice.STATUS_CHOICES}

這就像靜態變量。