How to Sort a List of Dictionaries in Python by Key Value?

Sorting Dictionaries in Python by Key Values

Sorting a list of dictionaries by a specific value can be achieved using Python's sorted() function. By incorporating a key parameter, you can instruct sorted() to organize the dictionaries based on the value of a desired key.

Using a Lambda Function:

The following code illustrates how to sort a list of dictionaries by the 'name' key using a lambda function:

newlist = sorted(list_to_be_sorted, key=lambda d: d['name'])

Using Operator.itemgetter:

Alternatively, you can employ Python's operator.itemgetter class to achieve the same result:

from operator import itemgetter
newlist = sorted(list_to_be_sorted, key=itemgetter('name'))

Reversing the Order:

To sort in descending order, add the reverse=True parameter to the sorted() function:

newlist = sorted(list_to_be_sorted, key=itemgetter('name'), reverse=True)

Example:

Consider the following list of dictionaries:

list_to_be_sorted = [{'name': 'Homer', 'age': 39}, {'name': 'Bart', 'age': 10}]

Sorting this list by the 'name' field will produce the following sorted list:

newlist = [{'name': 'Bart', 'age': 10}, {'name': 'Homer', 'age': 39}]

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