![]() iterable is a sequence or collection of values (such as list, dict, string). Sorted(l, key=lambda x: x) = sorted(l, key=emgetter('name'))īoth techniques sort the list in the same order (verified by execution of the final statement in the code block), but the first one is a little faster. A Python dictionary is an unordered collection that stores data as key pairs, differing from other data types that store single values. To sort a dictionary in Python, call the sorted() function on the dictionary items. To sort the Python dictionary by key in descending order use the ‘reverse‘ param as ‘True‘ and then pass it into the sorted() function. Sort Dictionary by key in Descending Order. ![]() dict() convert the sorted list of tuples back to a dictionary. rassar: I guess dictionaries without the desired key (genre) should be after those with keys. sorted() function sorts the list of tuples. This example has a list with two items, (my list has over 5000 items) each item is a dictionary. Python sorted () function can be used to sort the list of dictionaries in an ascending/descending order. # Check that each technique produces the same sort order juanpa: I don't want to sort the dictionary (I understand dictionaries are not sortable,) I want to sort the parent list of dictionaries. %timeit sorted(l, key=emgetter('name'))ġ0.7 µs ± 38.1 ns per loop (mean ± std. You already know that elements of the Python List could be objects of any type. # Test the performance with itemgetter sorting on name In Python, you can have a List of Dictionaries. %timeit sorted(l, key=lambda x: x)ġ3 µs ± 388 ns per loop (mean ± std. Use the itemgetter function as key function to sort the list of dictionaries. # Test the performance with a lambda function sorting on name By specifying a function to be applied to each element of the list, it is sorted according to the result of that function. Using the Pandas package is another method, though its runtime at large scale is much slower than the more traditional methods proposed by others: import pandas as pd The typical method for sorting dictionaries is to get a dictionary view, sort it, and then cast the resulting list back into a dictionary. To sort a list of dictionaries according to the value of the specific key, specify the key argument of the sort() method or the sorted() function.
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