Python: Combine two dictionary adding values for common keys

Last update on December 21 2024 07:28:13 (UTC/GMT +8 hours)

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

Sample Solution:

Python Code:

# Import the 'Counter' class from the 'collections' module.
from collections import Counter

# Create two dictionaries 'd1' and 'd2' with key-value pairs.
d1 = {'a': 100, 'b': 200, 'c': 300}
d2 = {'a': 300, 'b': 200, 'd': 400}

# Use the 'Counter' class to create counter objects for 'd1' and 'd2', which count the occurrences of each key.
# Then, add the counters together to merge the key-value pairs and their counts.
d = Counter(d1) + Counter(d2)

# Print the resulting merged dictionary 'd'.
print(d)

Sample Output:

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

Python Code Editor:

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