Method find

python/python3/tornado/template.py:789–801

(self, needle: str, start: int = 0, end: Optional[int] = None)

        self.pos = 0

    def find(self, needle: str, start: int = 0, end: Optional[int] = None) -> int:
        assert start >= 0, start
        pos = self.pos
        start += pos
        if end is None:
            index = self.text.find(needle, start)
        else:
            end += pos
            assert end >= start
            index = self.text.find(needle, start, end)
        if index != -1:
            index -= pos
        return index

    def consume(self, count: Optional[int] = None) -> str:
        if count is None: