Delete Characters to Make Fancy String LeetCode solution in Python

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class Solution:
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    def makeFancyString(self, s: str) -> str:
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        if len(s) < 3:
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            return s
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        ans = ""
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        ans += s[0]
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        ans += s[1]
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        for i in range(2, len(s)):
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            if s[i] != ans[-1] or s[i] != ans[-2]:
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                ans += s[i]
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        return ans