[Python-ideas] dict.items to accept optional iterable with keys to use
Victor Varvariuc
victor.varvariuc at gmail.com
Wed Apr 4 10:07:55 CEST 2012
Sometimes you want a dict which is subset of another dict. It would nice if
dict.items accepted an optional list of keys to return. If no keys are
given - use default behavior - get all items.
class NewDict(dict):
def items(self, keys=()):
"""Another version of dict.items() which accepts specific keys
to use."""
for key in keys or self.keys():
yield key, self[key]
a = NewDict({
1: 'one',
2: 'two',
3: 'three',
4: 'four',
5: 'five'})
print(dict(a.items()))print(dict(a.items((1, 3, 5))))
vic at ubuntu:~/Desktop$ python test.py {1: 'one', 2: 'two', 3: 'three',
4: 'four', 5: 'five'}{1: 'one', 3: 'three', 5: 'five'}
Thanks for the attention.
--
*Victor Varvariuc*
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