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Add ability to delete items only if they exist from UserDict

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This commit is contained in:
Vgr E. Barry 2018-04-25 20:39:57 -04:00
parent 8b4612847b
commit 1a459eebf4
1 changed files with 6 additions and 0 deletions
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6
src/containers.py
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@ -314,6 +314,12 @@ class UserDict(dict):
value.dict_values.append(self) value.dict_values.append(self)
def __delitem__(self, item): def __delitem__(self, item):
if isinstance(item, slice): # special-case: delete if it exists, otherwise don't
if item.start is item.step is None: # checks out
item = item.stop
if item not in self:
return
value = self[item] value = self[item]
super().__delitem__(item) super().__delitem__(item)
if isinstance(item, User): if isinstance(item, User):