Design a Text Editor.py

# Runtime: 1865 ms (Top 50.36%) | Memory: 27.8 MB (Top 82.98%)
class TextEditor:

    def __init__(self):
        self.s = ''
        self.cursor = 0

    def addText(self, text: str) -> None:
        self.s = self.s[:self.cursor] + text + self.s[self.cursor:]
        self.cursor += len(text)

    def deleteText(self, k: int) -> int:
        new_cursor = max(0, self.cursor - k)
        noOfChars = k if self.cursor - k >= 0 else self.cursor
        self.s = self.s[:new_cursor] + self.s[self.cursor:]
        self.cursor = new_cursor
        return noOfChars

    def cursorLeft(self, k: int) -> str:
        self.cursor = max(0, self.cursor - k)
        start = max(0, self.cursor-10)
        return self.s[start:self.cursor]

    def cursorRight(self, k: int) -> str:
        self.cursor = min(len(self.s), self.cursor + k)
        start = max(0, self.cursor - 10)
        return self.s[start:self.cursor]