python sort list of dictionaries by values of key

Python sort list of dictionaries by values of key how to#

In this article, I have explained how to sort a list of dictionaries by value in ascending/descending order using Pyhton sorted(), sort(), lambda function, and itemgetter() functions with examples. Dictionary elements should be enclosed with ] By specifying a function to be applied to each element of the list, it is sorted according to the result of that function. Each element in the dictionary is in the form of key:value pairs. To sort a list of dictionaries according to the value of the specific key, specify the key parameter of the sort() method or the sorted() function.

# Example 8: Sort a list of dictionaries having the same value for multiple keysĪ Python dictionary is a collection that is unordered, mutable, and does not allow duplicates. Print(sorted(dict_list, key=emgetter('calories'))) # Example 7: Sort list of dictionaries without key existence Print(sorted(dict_list, key=emgetter('fruit_name'))) # Example 6: Set emgetter() as key and sort Print(sorted(dict_list, key=lambda x: x.get('calories', 95))) # Example 5: Sort list of dictionaries using sorted() & get() Print(sorted(dict_list, key=lambda x: x.get('calories'))) # Example 4: Sort list of dictionaries using sorted() & get()

# Example 3: Sort list of dictionaries when key doesn't exist Print(sorted(dict_list, key=lambda x: x, reverse = True)) # Example 2: Sort list of dictionaries in descending order Print(sorted(dict_list, key=lambda x: x)) In a sense, you now implemented the getvalue function directly into the sorted() function call and used it right away.# Example 1: Sort list of dictionaries using sorted() & lambda Sort_data = sorted(ems(), key=lambda pair : pair) Sort_data = sorted(ems(), key=lambda x: x) python - Sorting dictionary keys based on their values - Stack Sort Dictionary by Value in Python How to Sort a Dict Sort keys in dictionary by value in a. To turn the result into a dictionary, you need to call the dict() function on it. It returns a list of tuples that represent the dictionary keys and values. Sort by Values: Ascending Orderįor example, given a data dictionary of student names mapped to their ages, let’s sort the dictionary data in ascending age order.īy the way, the sorted() function doesn’t return a dictionary. This function takes in the list of dictionaries. To create such a function, you can use a lambda function. To sort a list of dictionaries by a value of the dictionary in Python, you can use the sorted() function. It just needs to do is take a key-value pair as an input and return the value as an output. To sort in ascending order, the key function is trivial. In other words, the sorted() performs a built-in sorting algorithm on the elements of the list and calls the key function for each element to sort them in the desired way. The key parameter acts as the sorting function. To let the sorted() function know you want to sort the dictionary by values, specify the optional key parameter in the function call. By default, the sorted() function sorts a dictionary by keys. To sort a dictionary by values, you need to let the sorted() function know it. More specifically, you will now see how to sort dictionaries in Python in: Each student can be associated with data like name, age, grades, and so on.Īnyway, the point of this guide is not to teach what a dictionary is but how to sort it.

This makes dictionaries great data stores for labeled and structured data.įor instance, you might have a dictionary that represents the students of a class. The idea of a dictionary is to store values accessible via keys, instead of indices like in lists. In Python, a dictionary is a collection of key-value pairs. Let’s see the sorted() function in action by sorting a dictionary in a bunch of different ways. It provides a sorting function by which the elements are sorted. If the reverse is False, sorting happens in ascending order.If the reverse is True, sorting happens in descending order.iterable is a sequence or collection of values (such as list, dict, string) to be sorted.Let’s take a closer look at the arguments of the sorted() function: The syntax of the sorted() function is: sorted(iterable, key=None, reverse=False)

Python sort list of dictionaries by values of key