w3resource

Python: Combine two dictionary adding values for common keys

Python dictionary: Exercise-19 with Solution

Write a Python program to combine two dictionary adding values for common keys.

Sample Solution:-

Python Code:

from collections import Counter
d1 = {'a': 100, 'b': 200, 'c':300}
d2 = {'a': 300, 'b': 200, 'd':400}
d = Counter(d1) + Counter(d2)
print(d)

Sample Output:

Counter({'b': 400, 'd': 400, 'a': 400, 'c': 300}) 

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a Python program to check a dictionary is empty or not.
Next: Write a Python program to print all unique values in a dictionary.

What is the difficulty level of this exercise?

Test your Python skills with w3resource's quiz



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()