# First Steps

The simplest FastAPI file could look like this:

{* ../../docs_src/first_steps/tutorial001.py *}

Copy that to a file `main.py`.

Run the live server:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:single">main.py</u>
<font color="#3465A4">INFO    </font> Using path <font color="#3465A4">main.py</font>

   *
   * Use the `request` of the [networkResponse] field to get the wire-level request that was
   * transmitted. In the case of follow-ups and redirects, also look at the `request` of the
   * [priorResponse] objects, which have its own [priorResponse].
   */
  @get:JvmName("request") val request: Request,

				Namespace: minioNamespace,
				Subsystem: "locks",
				Name:      "total",
				Help:      "Number of current locks on this peer",
				Type:      gaugeMetric,
			},
			Value: float64(st.Total),
		})
		metrics = append(metrics, MetricV2{
			Description: MetricDescription{
				Namespace: minioNamespace,
				Subsystem: "locks",
				Name:      "write_total",

 * "value" of a successful step or the "result" (value or exception) of any step.
 *
 * <ol>
 *   <li>A pipeline starts at its leaf step (or steps), which is created from either a callable
 *       block or a {@link ListenableFuture}.
 *   <li>Each other step is derived from one or more input steps. At each step, zero or more objects
 *       can be captured for later closing.

   * the computation -- makes sense, and if we don't convert it, the user still has to write a
   * try-catch block.
   *
   * If you think you would use this method, let us know. You might also look into the
   * Fork-Join framework: http://docs.oracle.com/javase/tutorial/essential/concurrency/forkjoin.html
   */

message LocalVolumeSource {
  // path of the full path to the volume on the node.
  // It can be either a directory or block device (disk, partition, ...).
  optional string path = 1;

  // fsType is the filesystem type to mount.
  // It applies only when the Path is a block device.
  // Must be a filesystem type supported by the host operating system.

              }
          }
        }
      webSocket!!.initReaderAndWriter(name, this)
    }

    /**
     * Peeks the number of bytes available for the client to read immediately. This doesn't block so
     * it requires that bytes have already been flushed by the server.
     */
    fun clientSourceBufferSize(): Long {
      source.request(1L)
      return source.buffer.size
    }

        this.runnable = runnable;
        this.executor = executor;
      }
    }
  }

  // A version of the list that uses compare and swap to manage the stack without locks.
  @SuppressWarnings({"SunApi", "removal"}) // b/345822163
  private static final class ExecutionListCAS {
    static final Logger log = Logger.getLogger(ExecutionListCAS.class.getName());

    // Corner case: List is empty.
    if (futures.isEmpty()) {
      handleAllCompleted();
      return;
    }

    // NOTE: If we ever want to use a custom executor here, have a look at CombinedFuture as we'll
    // need to handle RejectedExecutionException

    if (allMustSucceed) {
      // We need fail fast, so we have to keep track of which future failed so we can propagate

			}
		}
		quorum := len(perPoolErrs) / 2
		poolErrs = append(poolErrs, reduceWriteQuorumErrs(ctx, perPoolErrs, bucketOpIgnoredErrs, quorum))
	}

	if !opts.Recreate {
		// when there is no force recreate look for pool
		// errors to recreate the bucket on all pools.
		opts.Remove = isAllBucketsNotFound(poolErrs)
		opts.Recreate = !opts.Remove
	}

	g = errgroup.WithNErrs(len(sys.peerClients))