}

    @Override
    BoundType typeAsUpperBound() {
      return BoundType.OPEN;
    }

    @Override
    Cut<C> withLowerBoundType(BoundType boundType, DiscreteDomain<C> domain) {
      switch (boundType) {
        case CLOSED:
          return this;
        case OPEN:
          C previous = domain.previous(endpoint);

    title: Take code reviews from hours to minutes
    img: https://fastapi.tiangolo.com/img/sponsors/codacy.png
bronze:
  - url: https://www.exoflare.com/open-source/?utm_source=FastAPI&utm_campaign=open_source
    title: Biosecurity risk assessments made easy.
    img: https://fastapi.tiangolo.com/img/sponsors/exoflare.png
  - url: https://testdriven.io/courses/tdd-fastapi/

    }

    @Override
    BoundType typeAsUpperBound() {
      return BoundType.OPEN;
    }

    @Override
    Cut<C> withLowerBoundType(BoundType boundType, DiscreteDomain<C> domain) {
      switch (boundType) {
        case CLOSED:
          return this;
        case OPEN:
          C previous = domain.previous(endpoint);

  fun enqueueCancel() {
    cancel = true
  }

  override fun onOpen(
    eventSource: EventSource,
    response: Response,
  ) {
    get().log("[ES] onOpen", Platform.INFO, null)
    events.add(Open(eventSource, response))
    drainCancelQueue(eventSource)
  }

  override fun onEvent(
    eventSource: EventSource,
    id: String?,
    type: String?,
    data: String,
  ) {

{!../../../docs_src/events/tutorial002.py!}
```

此处，`shutdown` 事件处理器函数在 `log.txt` 中写入一行文本 `Application shutdown`。

!!! info "说明"

    `open()` 函数中，`mode="a"` 指的是**追加**。因此这行文本会添加在文件已有内容之后，不会覆盖之前的内容。

!!! tip "提示"

    注意，本例使用 Python `open()` 标准函数与文件交互。

    这个函数执行 I/O（输入/输出）操作，需要等待内容写进磁盘。

    但 `open()` 函数不支持使用 `async` 与 `await`。

    因此，声明事件处理函数要使用 `def`，不能使用 `asnyc def`。

!!! info "说明"

 * endpoint) or <i>closed</i> (includes the endpoint) on that side. With three possibilities on each
 * side, this yields nine basic types of ranges, enumerated below. (Notation: a square bracket
 * ({@code [ ]}) indicates that the range is closed on that side; a parenthesis ({@code ( )}) means

    path = tmp_path / "test.txt"
    path.write_bytes(b"<file content>")
    path2 = tmp_path / "test2.txt"
    path2.write_bytes(b"<file content2>")

    client = TestClient(app)
    with path.open("rb") as file, path2.open("rb") as file2:
        response = client.post(
            "/files/",
            files=(
                ("files", ("test.txt", file)),
                ("files", ("test2.txt", file2)),
            ),

    } else {
      eventSequence.forEach loop@{
        when (e.closes(it)) {
          null -> return // no open event
          true -> return // found open event
          false -> return@loop // this is not the open event so continue
        }
      }
      fail<Any>("event $e without matching start event")
    }
  }

  override fun proxySelectStart(

		t.SkipNow()
	}

	dbDSN := os.Getenv("GORM_DSN")
	if dbDSN == "" {
		dbDSN = "gorm:gorm@tcp(localhost:9910)/gorm?charset=utf8&parseTime=True&loc=Local"
	}
	nativeDB, err := sql.Open("mysql", dbDSN)
	if err != nil {
		t.Fatalf("Should open db success, but got %v", err)
	}

	conn := &wrapperConnPool{
		db: nativeDB,
		expect: []string{
			"SELECT VERSION()",

  - package-ecosystem: "gomod"
    directory: "/"
    schedule:
      interval: "daily"
    # Limit number of open PRs to 0 so that we only get security updates
    # See https://docs.github.com/en/code-security/dependabot/dependabot-security-updates/configuring-dependabot-security-updates