def seek()

in s3transfer/utils.py [0:0]

• 17 lines of code
• 8 McCabe index (conditional complexity)

    def seek(self, where, whence=0):
        if whence not in (0, 1, 2):
            # Mimic io's error for invalid whence values
            raise ValueError(f"invalid whence ({whence}, should be 0, 1 or 2)")

        # Recalculate where based on chunk attributes so seek from file
        # start (whence=0) is always used
        where += self._start_byte
        if whence == 1:
            where += self._amount_read
        elif whence == 2:
            where += self._size

        self._fileobj.seek(max(where, self._start_byte))
        if self._callbacks is not None and self._callbacks_enabled:
            # To also rewind the callback() for an accurate progress report
            bounded_where = max(min(where - self._start_byte, self._size), 0)
            bounded_amount_read = min(self._amount_read, self._size)
            amount = bounded_where - bounded_amount_read
            invoke_progress_callbacks(
                self._callbacks, bytes_transferred=amount
            )
        self._amount_read = max(where - self._start_byte, 0)