Finding the Users Active Minutes LeetCode solution in Python

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class Solution:
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    def findingUsersActiveMinutes(self, logs: List[List[int]], k: int) -> List[int]:
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        ret = [0] * k  # UAM store
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        user_acts = {}  # User minutes store
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        # Adding user minutes to hash table
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        for log in logs:
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            if user_acts.get(log[0], 0):
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                user_acts[log[0]].append(log[1])
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            else:
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                user_acts[log[0]] = [log[1]]
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        # Calculating UAM
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        for k, v in user_acts.items():
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            l = len(set(v))
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            ret[l - 1] += 1
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        return ret