List to dict Python

Python List to Dictionary

There are many ways in which you can interpret the data in list as keys and values, and convert this list into a dictionary.

Some of the formats of lists are

• [key_1, value_1, key_2, value_2, ] Key:Value pairs as continuous elements of list.
• [key_1, key_2, ], [value_1, value_2, ] Keys are in one list, and Values are in another list.
• [(key_1, value_1), (key_2, value_2), ] Key:Value pairs as tuples, and these tuples are elements of the list.

Also, some of the other scenarios are:

• Converting Python List to dictionary with list element as key and index as value.
• Converting Python List to dictionary with list element as key and a default for value.

In this tutorial, we will learn how to convert these formats of list to dictionary, with the help of well detailed example programs.

Example 1: Convert List to Dictionary

In this example, we will convert the list of format [key_1, value_1, key_2, value_2, ] to dictionary of {key_1:value_1, key_2:value_2, }.

We will use dictionary comprehension to convert this type of list to dictionary.

Python Program

Output

Example 2: Convert Lists of Keys and Values to Dictionary

In this example, we will convert a list of format [(key_1, value_1), (key_2, value_2), ] to dictionary of {key_1:value_1, key_2:value_2, }.

We will use dictionary comprehension to convert this lists of keys and values to dictionary.

Python Program

Output

Example 3: Convert List of Tuples to Dictionary

In this example, we will convert a list of format [(key_1, value_1), (key_2, value_2), ] to dictionary of {key_1:value_1, key_2:value_2, }.

We will use dictionary comprehension to convert list of tuples to dictionary.

Python Program

Output

Example 4: Convert List of Dictionary with Index as Value

In this example, we will convert a list of format [key_1, key_2, ] to dictionary of {key_1:0, key_2:1, }.

Python Program

Output

Example 5: Convert List of Dictionary with Default Value

In this example, we will convert a list of format [key_1, key_2, ] to dictionary of {key_1:default_value, key_2:default_value, }.

Python Program

Output

Summary

In this tutorial of Python Examples, we learned how to convert a Python List to Dictionary.