Python Exercise: Combine values in python list of dictionaries

Python dictionary: Exercise-23 with Solution

Write a Python program to combine values in python list of dictionaries.

Sample Solution:-

Python Code:

from collections import Counter
item_list = [{'item': 'item1', 'amount': 400}, {'item': 'item2', 'amount': 300}, {'item': 'item1', 'amount': 750}]
result = Counter()
for d in item_list:
    result[d['item']] += d['amount']

Sample Output:

Counter({'item1': 1150, 'item2': 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 find the highest 3 values in a dictionary.
Next: Write a Python program to create a dictionary from a string.

What is the difficulty level of this exercise?

Test your Python skills with w3resource's quiz

Python: Tips of the Day

Python: Convert byte to a string?

You need to decode the bytes object to produce a string:

>>> b"abcde"

# utf-8 is used here because it is a very common encoding, but you
# need to use the encoding your data is actually in.
>>> b"abcde".decode("utf-8") 

Ref: https://bit.ly/2YuvClI