Suppose that mydict is a dictionary defined by
mydict = {'a': 2, 'c': 5, 'b': 1, 'd': 4}Remember that dictionary has no function sort, since it is unordered, not like a list, or tuple.
However, the key function, introduced in version 2.4, is helpful in sorting a dictionary.
To sort by items, and return the keys and items,
sorted( mydict.items(), key=lambda x: x[1] )output:
[('b', 1), ('a', 2), ('d', 4), ('c', 5)]To return only the keys, sorted by the items,
sorted( mydict.keys(), key=lambda x: mydict[x] )output:
['b', 'a', 'd', 'c']Note that, adding reverse=True at the end of the sorted function would produce a decending order list.
sorted( mydict.items(), key=lambda x: x[1] )output:
[('c', 5), ('d', 4), ('a', 2), ('b', 1)]Happy sorting.
