dictionary - Python reverse / inverse a mapping - Stack ... 2009年1月27日 - Given a dictionary like so: map = { 'a': 1, 'b':2 }. How can one invert this ... for python 2.7+ / 3+: inv_map = {v: k for k, v in map.items()} ...
Inverse dictionary lookup - Python - Stack Overflow 2010年4月2日 - is there any straight forward way of finding a key by knowing the value within a dictionary? all I can think of is this: key = [i for key,value in ...
Python: Best Way to Exchange Keys with Values in a ... 2009年6月23日 - possible duplicate of Python reverse / inverse a mapping – Cory Apr 4 '14 at 22:44 ... Beware that you cannot 'reverse' a dictionary if. More than ...
How to reverse order of keys in python dict? - Stack Overflow 2011年3月28日 - this is my code : a = {0:'000000',1:'11111',3:'333333',4:'444444'} for i ... The order keys are iterated in is arbitrary. It was only a coincidence that ...
reverse mapping of dictionary with Python - Stack Overflow 2010年7月11日 - Possible Duplicate: Inverse dictionary lookup - Python. If I have a ... If you do this often, you'll want to build a reverse dictionary: >>> rev_ref ... dict( ...
python - Invert keys and values of the original dictionary ... 2011年9月5日 - You can use a defaultdict with list: >>> from collections import defaultdict >>> m = {'a': 2, 'b': 1, 'c': 2, 'd': 1} >>> dd = defaultdict(list) >>> for k, v in ...
reversing dictionary in python - Stack Overflow 2011年9月9日 - Swap keys for unique values in a dictionary in Python. Hello i want to understand how to reverse and compare dictionary values: for example :.
Invert a dictionary (one-liner) « Python recipes « ActiveState ... 2003年11月17日 - Dictionaries map keys to values. Looking up a value is as simple as typing: mydict[key]. But what if you want to look up a key? The following ...
Reverse dictionary lookup and more, on beyond z | Stupid ... 2014年7月30日 - Here's a dead simple problem: I have a dictionary, and I want to find the ... because most non-hashable types in Python are non-hashable ... It's not really a reverse dictionary anymore, but it's an extension of the same idea.
How to invert a dict in Python - SaltyCrane Blog 2008年1月14日 - Example 1: If the values in the dictionary are unique and hashable, then I can use Recipe 4.14 in the Python Cookbook, 2nd Edition.