This topic created in 3819 days ago, the information mentioned may be changed or developed.
打算看 flask 的源码，然后看到这个
class SessionMixin(object):
"""Expands a basic dictionary with an accessors that are expected
by Flask extensions and users for the session.
"""
def _get_permanent(self):
return self.get('_permanent', False)
def _set_permanent(self, value):
self['_permanent'] = bool(value)
#: this reflects the ``'_permanent'`` key in the dict.
permanent = property(_get_permanent, _set_permanent)
del _get_permanent, _set_permanent
为什么我创建了一个 SessionMixin 类之后， permanet 打印不出来，报这个错误
AttributeError: 'SessionMixin' object has no attribute 'get'
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1
julyclyde Nov 17, 2015
Mixin 类不是让你直接生成对象的，而是让你用来多重继承的
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