Path-параметр всегда является обязательным, поскольку он составляет часть пути.

Поэтому следует объявить его с помощью `...`, чтобы обозначить, что этот параметр обязательный.

Тем не менее, даже если вы объявите его как `None` или установите для него значение по умолчанию, это ни на что не повлияет и параметр останется обязательным.

///

## Задайте нужный вам порядок параметров

/// tip | "Подсказка"

可在一个*路径操作*中声明多个 `File` 和 `Form` 参数，但不能同时声明要接收 JSON 的 `Body` 字段。因为此时请求体的编码是 `multipart/form-data`，不是 `application/json`。

这不是 **FastAPI** 的问题，而是 HTTP 协议的规定。

///

## 可选文件上传

您可以通过使用标准类型注解并将 None 作为默认值的方式将一个文件参数设为可选:

//// tab | Python 3.9+

```Python hl_lines="7  14"
{!> ../../docs_src/request_files/tutorial001_02_py310.py!}
```

////

//// tab | Python 3.8+

// isHostIP - helper for validating if the provided arg is an ip address.
func isHostIP(ipAddress string) bool {
	host, _, err := net.SplitHostPort(ipAddress)
	if err != nil {
		host = ipAddress
	}
	// Strip off IPv6 zone information.
	if i := strings.Index(host, "%"); i > -1 {
		host = host[:i]
	}
	return net.ParseIP(host) != nil
}

// extractHostPort - extracts host/port from many address formats

	testGenerateOption(t, false, func(t *testing.T, actual, expected []admitv1.MutatingWebhook) {
		if err := assert.Compare(actual, expected); err == nil {
			t.Errorf("expected diff between webhooks, got none")
		}
	})

    opt Raise other exception
        tasks -->> tasks: Handle exceptions in the background task code
    end
```

/// info

Only **one response** will be sent to the client. It might be one of the error responses or it will be the response from the *path operation*.

After one of those responses is sent, no other response can be sent.

///

/// tip

  //
  // Approved and Denied conditions are mutually exclusive.
  // Approved, Denied, and Failed conditions cannot be removed once added.
  //
  // Only one condition of a given type is allowed.
  optional string type = 1;

  // status of the condition, one of True, False, Unknown.
  // Approved, Denied, and Failed conditions may not be "False" or "Unknown".
  optional string status = 6;

  (
    cp -r integration-tests "${GRADLE_TEMP}/${version}"
    cd "${GRADLE_TEMP}/${version}/gradle"
    ./gradlew wrapper --gradle-version="${version}"
    ./gradlew testClasspath
  )

/**
 * @author wyukawa
 *
 */
public class BinaryConversionUtilTest {

    /**
     * @see org.junit.rules.ExpectedException
     */
    @Rule
    public ExpectedException exception = ExpectedException.none();

    /**
     * Test method for
     * {@link org.codelibs.core.convert.BinaryConversionUtil#toBinary(java.lang.Object)}
     * .
     */
    @Test
    public void testToBinary() {

  public void testFilteredValuesClear() {
    Map<String, Integer> unfiltered = createUnfiltered();
    unfiltered.put("one", 1);
    unfiltered.put("two", 2);
    unfiltered.put("three", 3);
    unfiltered.put("four", 4);
    Map<String, Integer> filtered = Maps.filterValues(unfiltered, EVEN);
    assertEquals(ImmutableMap.of("one", 1, "two", 2, "three", 3, "four", 4), unfiltered);
    assertEquals(ImmutableMap.of("two", 2, "four", 4), filtered);

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *