Python | Sum values for each key in nested dictionary
Given a nested dictionary and we have to find sum of particular value in that nested dictionary. This is basically useful in cases where we are given a JSON object or we have scraped a particular page and we want to sum the value of a particular attribute in objects.
Code #1: Find sum of sharpness values using sum() function
# Python code to find sum values within nested dictionaries weapons = {'': None, 'sword': { 'steel': 151, 'sharpness': 100, 'age': 2,}, 'arrow': {'steel': 120, 'sharpness': 205, 'age': 1,}} sumValue1 = sum(d['sharpness'] for d in weapons.values() if d) sumValue2 = sum(d['steel'] for d in weapons.values() if d) print(sumValue1) print(sumValue2) |
Output:
305 271
Code #2 : Using Iteration to convert it into key:value pair.
# Python code to find sum values within nested dictionaries weapons = {'': None, 'sword': { 'steel': 151, 'sharpness': 100, 'age': 2,}, 'arrow': {'steel': 120, 'sharpness': 205, 'age': 1,}} sum = 0 # iterating key value pair for key ,value in weapons.items(): if value and 'sharpness' in value.keys(): # Adding value of sharpness to sum sum += value['sharpness'] # printing sum print(sum) |
Output:
305
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