I have a lists of lists LofL = [['a',20], ['a',50], ['b',14], ['c', 9], ['b', 1], ['d', 44], ['d', 5]]
and I want to make a dictionary that has the string as the key and the value as the values in the LofL for each respective string to be added together. EX:
dict1 = {'a': 70, 'b': 15, 'c': 9, 'd': 49}
The order doesn’t matter as I will be calling values from the dictionary if the key is equal to a different input. I’m just lost on how to have the values add together. So far all I’ve been able to make is a dictionary that has the last set of keys and values equal to what is in the dictionary. EX:
dict1 = {'a': 50, 'b': 1, 'c': 9, 'd': 44}
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Answer
Here is another way to do so:
LofL = [['a',20], ['a',50], ['b',14], ['c', 9], ['b', 1], ['d', 44], ['d', 5]] dict1 = {x: 0 for x, _ in LofL} for char, num in LofL: dict1[char] += num print(dict1)