I use Python dictionary:
>>> a = {}
>>> a["w"] = {}
>>> a["a"] = {}
>>> a["s"] = {}
>>> a
{'a': {}, 's': {}, 'w': {}}
I need:
>>> a
{'w': {}, 'a': {}, 's': {}}
How can I get the order in which I filled the dictionary?
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1docs.python.org/2/library/…Elazar– Elazar2013-06-14 09:07:46 +00:00Commented Jun 14, 2013 at 9:07
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2You could use OrderedDict docs.python.org/2/library/…Ankur Ankan– Ankur Ankan2013-06-14 09:08:34 +00:00Commented Jun 14, 2013 at 9:08
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stackoverflow.com/a/39537308/6561141 for python 3.6 and above, dict maintains insertion orderingmrtpk– mrtpk2017-07-17 10:30:06 +00:00Commented Jul 17, 2017 at 10:30
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2 Answers
http://docs.python.org/2/library/collections.html#collections.OrderedDict
An OrderedDict is a dict that remembers the order that keys were first inserted. If a new entry overwrites an existing entry, the original insertion position is left unchanged. Deleting an entry and reinserting it will move it to the end.
>>> import collections
>>> a = collections.OrderedDict()
>>> a['w'] = {}
>>> a['a'] = {}
>>> a['s'] = {}
>>> a
OrderedDict([('w', {}), ('a', {}), ('s', {})])
>>> dict(a)
{'a': {}, 's': {}, 'w': {}}
Comments
you should use OrderedDict instead of Dict.
