    def _get_conn(self, timeout: float | None = None) -> BaseHTTPConnection:
…
        conn = None

        if self.pool is None:
            raise ClosedPoolError(self, "Pool is closed.")

        try:
            conn = self.pool.get(block=self.block, timeout=timeout)

        except AttributeError:  # self.pool is None
            raise ClosedPoolError(self, "Pool is closed.") from None  # Defensive:

        except queue.Empty:
            if self.block:
                raise EmptyPoolError(
                    self,
                    "Pool is empty and a new connection can't be opened due to blocking mode.",
                ) from None
            pass  # Oh well, we'll create a new connection then

        # If this is a persistent connection, check if it got disconnected
        if conn and is_connection_dropped(conn):
            log.debug("Resetting dropped connection: %s", self.host)
            conn.close()

        return conn or self._new_conn()

    def _put_conn(self, conn: BaseHTTPConnection | None) -> None:
…
        if self.pool is not None:
            try:
                self.pool.put(conn, block=False)
                return  # Everything is dandy, done.
            except AttributeError:
                # self.pool is None.
                pass
            except queue.Full:
                # Connection never got put back into the pool, close it.
                if conn:
                    conn.close()

                if self.block:
                    # This should never happen if you got the conn from self._get_conn
                    raise FullPoolError(
                        self,
                        "Pool reached maximum size and no more connections are allowed.",
                    ) from None

                log.warning(
                    "Connection pool is full, discarding connection: %s. Connection pool size: %s",
                    self.host,
                    self.pool.qsize(),
                )

        # Connection never got put back into the pool, close it.
        if conn:
            conn.close()
Warm-up
