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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']
print(result) 
 

Sample Output:

Counter({'item1': 1150, 'item2': 300})

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Python: Tips of the Day

Python: Convert byte to a string?

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

>>> b"abcde"
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") 
'abcde'

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