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## Generate a TypeScript Frontend Client

Let's start with a simple FastAPI application:

//// tab | Python 3.9+

```Python hl_lines="7-9  12-13  16-17  21"
{!> ../../docs_src/generate_clients/tutorial001_py39.py!}
```

////

//// tab | Python 3.8+

				getEndpointStrings: s.GetEndpointStrings(i),
				nsMutex:            mutex,
			}
		}(i)
	}

	wg.Wait()

	// start cleanup stale uploads go-routine.
	go s.cleanupStaleUploads(ctx)

	// start cleanup of deleted objects.
	go s.cleanupDeletedObjects(ctx)

	// Start the disk monitoring and connect routine.
	if !globalIsTesting {
		go s.monitorAndConnectEndpoints(ctx, defaultMonitorConnectEndpointInterval)

          "format": "time_series",
          "intervalFactor": 1,
          "refId": "A",
          "step": 4
        }
      ],
      "title": "Incoming Request Volume",
      "type": "stat"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${datasource}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {

github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
github.com/nats-io/stan.go v0.10.2/go.mod h1:vo2ax8K2IxaR3JtEMLZRFKIdoK/3o1/PKueapB7ezX0=
github.com/nats-io/stan.go v0.10.4 h1:19GS/eD1SeQJaVkeM9EkvEYattnvnWrZ3wkSWSw4uXw=
github.com/nats-io/stan.go v0.10.4/go.mod h1:3XJXH8GagrGqajoO/9+HgPyKV5MWsv7S5ccdda+pc6k=
github.com/ncw/directio v1.0.5 h1:JSUBhdjEvVaJvOoyPAbcW0fnd0tvRXD76wEfZ1KcQz4=

	f, err := Open(path, flag, perm)
	if err != nil {
		return nil, err
	}

	if err = lockFile(syscall.Handle(f.Fd()), lockType); err != nil {
		f.Close()
		return nil, err
	}

	st, err := os.Stat(path)
	if err != nil {
		f.Close()
		return nil, err
	}

	if st.IsDir() {
		f.Close()
		return nil, &os.PathError{
			Op:   "open",
			Path: path,
			Err:  syscall.EISDIR,
		}
	}

                @Override
                public void uncaughtException(Thread thread, Throwable e) {
                  thrownByExecutionThread = e;
                }
              });
          executionThread.start();
        }
      };

  @Override
  protected final void tearDown() {
    tearDownStack.runTearDown();
    assertNull(
        "exceptions should not be propagated to uncaught exception handlers",

  private @Nullable Throwable uncaughtThrowable = null;

  public TestThread(L lockLikeObject, String threadName) {
    super(threadName);
    this.lockLikeObject = checkNotNull(lockLikeObject);
    start();
  }

  // Thread.stop() is okay because all threads started by a test are dying at the end of the test,
  // so there is no object state put at risk by stopping the threads abruptly. In some cases a test

     * this operation is executing, not all of those new 1's may be set in the final state of this
     * LockFreeBitArray. The ONLY guarantee provided is that all the bits that were set in the other
     * LockFreeBitArray at the start of this method will be set in this LockFreeBitArray at the end
     * of this method.
     */
    void putAll(LockFreeBitArray other) {
      checkArgument(
          data.length() == other.data.length(),

                    String server = str.substring(mark, si).trim();
                    if ( server.length() == 0 ) {
                        // this can also be a v6 address within brackets, look ahead required
                        int nexts = str.indexOf('[', si + 1);
                        int nexte = str.indexOf(']', si);
                        if ( nexts >= 0 && nexte >= 0 && nexte == nexts - 1 ) {

	netServer := newNetServer(ztunnelServer, podNsMap, iptablesConfigurator, NewPodNetnsProcFinder(fakeFs()))

	netServer.netnsRunner = func(fdable NetnsFd, toRun func() error) error {
		return toRun()
	}
	netServer.Start(ctx)
	return netTestFixture{
		netServer:            netServer,
		podNsMap:             podNsMap,
		ztunnelServer:        ztunnelServer,
		iptablesConfigurator: iptablesConfigurator,
		nlDeps:               nlDeps,
	}