Path 1: 4 calls (1.0)

→ n 5 (1) 15 (1) 25 (1) 35 (1)

↩ return bytes (4)

3 run 2 not run

1def peek(self, n):
2        self._check_not_closed()
3        if self.mode != READ:
4            import errno
5            raise OSError(errno.EBADF, "peek() on write-only GzipFile object")
6        return self._buffer.peek(n)