Python: Combine two dictionary adding values for common keys
19. Combine Two Dictionaries by Adding Values
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})
For more Practice: Solve these Related Problems:
- Write a Python program to combine two dictionaries and add values for keys that appear in both using collections.Counter.
- Write a Python program to merge two dictionaries by summing the values of common keys with a loop.
- Write a Python program to use dictionary comprehension to create a new dictionary that adds values for matching keys from two dictionaries.
- Write a Python program to implement a function that takes two dictionaries and returns a merged dictionary with summed values for shared keys.
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