CREATE DICT FROM LIST PYTHON HOW TO

Python dictionary :ĭictionaries are used to store key-value pairs in python. Values of the first list will be the keys to the dictionary and corresponding values of the second list will be the values of the dictionary. Our program will ask the user to enter the values for both lists and then it will create one dictionary by taking the values.

CREATE DICT FROM LIST PYTHON HOW TO

In this python programming tutorial, we will learn how to create a dictionary from two different user input lists. Once we execute the above Python program, we will get the following result.Create a dictionary from two lists in python : In this example, we use the zip_longest() function to create a dictionary of lists named student_marks. Student_marks = dict(zip_longest(keys, values, fillvalue=)) This will result in forming a dictionary of lists in Python. After this, we will use the dict() constructor to convert that tuple into a dictionary. In this method, we will use the zip_longest() function to aggregate keys and a list of values. This allows us to aggregate elements from multiple iterables of potentially different lengths, filling in with a specified value for shorter iterables. The zip_longest is a built-in function that comes under the itertools module. Here is the result of the above Python program.

And then we used the dict() and zip() functions to create a dictionary of lists in Python. In the above example, we have taken 2 lists- keys and values. And then, we will use the dict() constructor to convert that tuple to the dictionary. So, in this method, we will use the zip() function to aggregate multiple list data into a tuple. On the other side, zip() is another built-in Python function that allows aggregate elements from multiple lists to a tuple. The dict() constructor is another way to define a dictionary in Python. Read: Python dictionary multiple keys Method 2: Using dict() and zip() In the above example, we used the dictionary literals to define a dictionary of lists named students_marks.Īfter this, we use the for loop to iterate over each key and its list of values and calculate the average marks for each student. Print('Average marks of', name, 'is', avg) # Calculating the average of each student # Defining a dictionary of list using dict literals Here is an example of defining a dictionary of lists using dictionary literals. Within the curly brackets, we use a colon to separate key-value pairs separated by coma. In Python, we can define dictionary literals by using curly brackets. One of the primary ways to create a Python dictionary of lists is by using the dictionary literals. Let us discuss each method to create a Python dictionary of lists. However, to obtain the values of a dictionary, we use the key name within the square brackets. First, we insert key-value within the curly brackets to create a dictionary of lists. In Python, the dictionary of lists means having a dictionary consisting of values as a list.īasically, a Python dictionary is an unordered and immutable data type and can be used as a key element.

Method 3: Using a dictionary comprehension.

Create dict from list python