*
   * ```
   * [5] EXPLICIT UTF8String
   * ```
   *
   * @param forceConstructed non-null to set the constructed bit to the specified value, even if the
   *     writing process sets something else. This is used to encode SEQUENCES in values that are
   *     declared to have non-constructed values, like OCTET STRING values.
   */
  @Suppress("UNCHECKED_CAST") // read() produces a single element of the expected type.

So, you can use `user_agent` as you normally would in Python code, instead of needing to capitalize the first letters as `User_Agent` or something similar.

If for some reason you need to disable automatic conversion of underscores to hyphens, set the parameter `convert_underscores` of `Header` to `False`:

{* ../../docs_src/header_params/tutorial002_an_py310.py hl[10] *}

    // Read a token68, a sequence of parameters, or nothing.
    val commaPrefixed = skipCommasAndWhitespace()
    peek = readToken()
    if (peek == null) {
      if (!exhausted()) return // Expected a token; got something else.
      result.add(Challenge(schemeName, emptyMap()))
      return
    }

    var eqCount = skipAll('='.code.toByte())
    val commaSuffixed = skipCommasAndWhitespace()

`Optional[Something]` là một cách viết ngắn gọn của `Union[Something, None]`, chúng là tương đương nhau.

Điều này cũng có nghĩa là trong Python 3.10, bạn có thể sử dụng `Something | None`:

//// tab | Python 3.10+

```Python hl_lines="1"
{!> ../../docs_src/python_types/tutorial009_py310.py!}
```

Although you use `Depends` in the parameters of your function the same way you use `Body`, `Query`, etc, `Depends` works a bit differently.

You only give `Depends` a single parameter.

This parameter must be something like a function.

You **don't call it** directly (don't add the parenthesis at the end), you just pass it as a parameter to `Depends()`.

And that function takes parameters in the same way that *path operation functions* do.

    assertHash(expected, murmur3_32_fixed().newHasher().putBytes(string.getBytes(charset)).hash());
  }

  private boolean allBmp(String string) {
    // Ordinarily we'd use something like i += Character.charCount(string.codePointAt(i)) here. But
    // we can get away with i++ because the whole point of this method is to return false if we find
    // a code point that doesn't fit in a char.

              } catch (Throwable t) {
                // (including CancellationException and sneaky checked exception)
                // The task is presumably done, run the listeners.
                // TODO(cpovirk): Do *something* in case of Error (and maybe
                // non-CancellationException, non-ExecutionException exceptions)?
              }
              executionList.execute();
            });
      }
    }
  }

///

Quando você adiciona um exemplo dentro de um modelo Pydantic, usando `schema_extra` ou` Field(example="something") `esse exemplo é adicionado ao **JSON Schema** para esse modelo Pydantic.

E esse **JSON Schema** do modelo Pydantic está incluído no **OpenAPI** da sua API e, em seguida, é usado na UI da documentação.

# exec".
# Important: "tfrun foo | bar" is "( tfrun foo ) | bar", not "tfrun (foo | bar)".
# Therefore, "tfrun" commands cannot include pipes -- which is
# probably for the better. If a pipe is necessary for something, it is probably
# complex. Write a well-documented script under utilities/ to encapsulate the
# functionality instead.
tfrun() { "$@"; }

if [[ $(uname -s) = MSYS_NT* ]]; then

  @BeforeEach
  fun setUp() {
    originalDefault = TimeZone.getDefault()
    // The default timezone should affect none of these tests: HTTP specified GMT, so we set it to
    // something else.
    TimeZone.setDefault(TimeZone.getTimeZone("America/Los_Angeles"))
  }

  @AfterEach
  @Throws(Exception::class)
  fun tearDown() {
    TimeZone.setDefault(originalDefault)
  }

  @Test