*
 *  * call ([callStart], [callEnd], [callFailed])
 *    * proxy selection ([proxySelectStart], [proxySelectEnd])
 *    * dns ([dnsStart], [dnsEnd])
 *    * connect ([connectStart], [connectEnd], [connectFailed])
 *      * secure connect ([secureConnectStart], [secureConnectEnd])
 *    * connection held ([connectionAcquired], [connectionReleased])
 *      * request ([requestFailed])

      "https://tls13.akamai.io/",
      "https://swifttls.org/",
      "https://www.googleapis.com/robots.txt",
      "https://graph.facebook.com/robots.txt",
      "https://api.twitter.com/robots.txt",
      "https://connect.squareup.com/robots.txt",
    )

  println("TLS1.3+TLS1.2")
  testClient(urls, buildClient(ConnectionSpec.RESTRICTED_TLS))

  println("\nTLS1.3 only")
  testClient(urls, buildClient(TLS_13))

            wagon.connect(
                    new Repository(repository.getId(), repository.getUrl()),
                    authenticationInfo(repository),
                    proxyInfo(repository));

        } else if (repository.getAuthentication() != null) {
            wagon.connect(new Repository(repository.getId(), repository.getUrl()), authenticationInfo(repository));

import java.net.Socket
import okhttp3.Connection
import okhttp3.Handshake
import okhttp3.HttpUrl
import okhttp3.Protocol
import okhttp3.Route

/**
 * The object that is asking for a connection. Either a call or a connect policy from the pool.
 */
interface ConnectionUser {
  fun addPlanToCancel(connectPlan: ConnectPlan)

  fun removePlanToCancel(connectPlan: ConnectPlan)

  fun updateRouteDatabaseAfterSuccess(route: Route)

      "Edge %s that was used to generate this set is no longer in the graph.";
  static final String REUSING_EDGE =
      "Edge %s already exists between the following nodes: %s, "
          + "so it cannot be reused to connect the following nodes: %s.";
  static final String MULTIPLE_EDGES_CONNECTING =
      "Cannot call edgeConnecting() when parallel edges exist between %s and %s. Consider calling "
          + "edgesConnecting() instead.";

# Debugging

You can connect the debugger in your editor, for example with Visual Studio Code or PyCharm.

## Call `uvicorn`

In your FastAPI application, import and run `uvicorn` directly:

```Python hl_lines="1  15"
{!../../docs_src/debugging/tutorial001.py!}
```

### About `__name__ == "__main__"`

The main purpose of the `__name__ == "__main__"` is to have some code that is executed when your file is called with:

    """
    METHOD = 'assume-role-client-grants'
    CANONICAL_NAME = 'AssumeRoleClientGrants'

    def __init__(self, cid, csec,
                 idp_ep='http://localhost:8080/auth/realms/minio/protocol/openid-connect/token',
                 sts_ep='http://localhost:9000'):
        self.cid = cid
        self.csec = csec
        self.idp_ep = idp_ep
        self.sts_ep = sts_ep

            CIFSContext ctx = lowConnectTimeout(getContext());
            try ( SmbResource f = new SmbFile(
                new URL("smb", addr.getHostAddress(), port, "/" + getTestShare() + "/connect.test", ctx.getUrlHandler()),
                ctx) ) {
                runConnectTimeoutTest(threadsBefore, start, ctx, f);
            }
        }
    }

  /**
   * Returns true if the edges in this graph are directed. Directed edges connect a {@link
   * EndpointPair#source() source node} to a {@link EndpointPair#target() target node}, while
   * undirected edges connect a pair of nodes to each other.
   */
  @Override
  boolean isDirected();

  /**
   * Returns true if this graph allows self-loops (edges that connect a node to itself). Attempting

  private val listener: EventSourceListener,
) : EventSource, ServerSentEventReader.Callback, Callback {
  private var call: Call? = null

  @Volatile private var canceled = false

  fun connect(callFactory: Call.Factory) {
    call =
      callFactory.newCall(request).apply {
        enqueue(this@RealEventSource)
      }
  }

  override fun onResponse(
    call: Call,
    response: Response,