Python – Convert List to Index and Value dictionary

When it is required to convert a list into an index value dictionary, the ‘enumerate' and a simple iteration are used.

Example

Below is a demonstration of the same −

my_list = [32, 0, 11, 99, 223, 51, 67, 28, 12, 94, 89] print("The list is :") print(my_list) my_list.sort(reverse=True) print("The sorted list is ") print(my_list) index, value = "index", "values" my_result = {index : [], value : []} for id, vl in enumerate(my_list): my_result[index].append(id) my_result[value].append(vl) print("The result is :") print(my_result)

Output

The list is : [32, 0, 11, 99, 223, 51, 67, 28, 12, 94, 89] The sorted list is [223, 99, 94, 89, 67, 51, 32, 28, 12, 11, 0] The result is : {'index': [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10], 'values': [223, 99, 94, 89, 67, 51, 32, 28, 12, 11, 0]}

Explanation

• A list of integers is defined and is displayed on the console.

• The list is sorted in reverse order and is displayed on the console.

• The index and values are initialized for display purposes.

• The list is iterated over using enumerate, and the index and values are appended to the empty list.

• This is the output that is displayed on the console.