Generate a String With Characters That Have Odd Counts LeetCode solution in Python

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class Solution:
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    def generateTheString(self, n: int) -> str:
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        alpha = "abcdefghijklmnopqrstuvwxyz"
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        res = ""
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        while n > 0:
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            curr, alpha = alpha[0], alpha[1:]
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            if n % 2:
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                res += curr * n
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                n -= n
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            else:
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                res += curr * (n - 1)
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                n -= n - 1
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        return res