Count Integers With Even Digit Sum LeetCode solution in Python

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class Solution:
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    def countEven(self, num: int) -> int:
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        if num % 2 != 0:
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            return num // 2
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        s = 0
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        t = num
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        while t:
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            s = s + (t % 10)
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            t = t // 10
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        if s % 2 == 0:
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            return num // 2
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        else:
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            return (num // 2) - 1