Design a Text Editor LeetCode solution in Python

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# Runtime: 1865 ms (Top 50.36%) | Memory: 27.8 MB (Top 82.98%)
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class TextEditor:
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    def __init__(self):
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        self.s = ""
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        self.cursor = 0
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    def addText(self, text: str) -> None:
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        self.s = self.s[: self.cursor] + text + self.s[self.cursor :]
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        self.cursor += len(text)
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    def deleteText(self, k: int) -> int:
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        new_cursor = max(0, self.cursor - k)
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        noOfChars = k if self.cursor - k >= 0 else self.cursor
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        self.s = self.s[:new_cursor] + self.s[self.cursor :]
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        self.cursor = new_cursor
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        return noOfChars
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    def cursorLeft(self, k: int) -> str:
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        self.cursor = max(0, self.cursor - k)
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        start = max(0, self.cursor - 10)
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        return self.s[start : self.cursor]
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    def cursorRight(self, k: int) -> str:
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        self.cursor = min(len(self.s), self.cursor + k)
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        start = max(0, self.cursor - 10)
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        return self.s[start : self.cursor]