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Python: Create a dictionary from two lists without losing duplicate values

Python dictionary: Exercise-36 with Solution

Write a Python program to create a dictionary from two lists without losing duplicate values.

Sample Solution:-

Python Code:

from collections import defaultdict
class_list = ['Class-V', 'Class-VI', 'Class-VII', 'Class-VIII']
id_list = [1, 2, 2, 3]
temp = defaultdict(set)
for c, i in zip(class_list, id_list):
    temp[c].add(i)
print(temp)

Sample Output:

defaultdict(<class 'set'>, {'Class-V': {1}, 'Class-VI': {2}, 'Class-VII': {2}, 'Class-VIII': {3}})

Pictorial Presentation:

Python Dictionary: Create a dictionary from two lists without losing duplicate values.

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Python: Tips of the Day

Free up Memory:

  • Manual garbage collection can be performed on timely or event based mechanism.
import gc
collected_objects = gc.collect()