class DiffDict(object):
"""获取两个dict的差异"""
def __init__(self, current, last):
self.current = current
self.last = last
self.set_current = set(current)
self.set_last = set(last)
self.intersect_keys = self.set_current & self.set_last
def get_added(self):
"""current - 交集 = 新增的key"""
added_keys = self.set_current - self.intersect_keys
return [{'key': key, 'value': self.current.get(key)} for key in added_keys]
def get_removed(self):
"""last - 交集 = 减去的key"""
removed_keys = self.set_last - self.intersect_keys
return [{'key': key, 'value': self.current.get(key)} for key in removed_keys]
def get_changed(self):
"""用交集中的key去两个dict中找出值不相等的"""
changed_keys = set(o for o in self.intersect_keys if self.current.get(o) != self.last.get(o))
return [{
'key': key,
'value': '%s -> %s' % (self.last.get(key), self.current.get(key))
} for key in changed_keys]