Computers and Technology, 30.04.2021 21:50 tchou163

define a function named sum_values_by_year with two parameters. the first parameter will be a list of dictionaries (the data). the second parameter will be a string (a key). this function must return a dictionary. the keys of the dictionary are the year strings that appear in the dictionaries. the values must be the sum of the dictionaries' values associated with the second parameter for that year.

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define a function named sum_values_by_year with two parameters. the first parameter will be a list o...