## Install `WebSockets`

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and install `websockets`:

<div class="termy">

```console
$ pip install websockets

---> 100%
```

</div>

## WebSockets client

### In production

確保你建立一個[虛擬環境](../virtual-environments.md){.internal-link target=_blank}，啟用它，然後**安裝 FastAPI**：

<div class="termy">

```console
$ pip install "fastapi[standard]"

---> 100%
```

</div>

/// note

當你使用 `pip install "fastapi[standard]"` 安裝時，會包含一些預設的可選標準相依項。

如果你不想包含那些可選的相依項，你可以使用 `pip install fastapi` 來安裝。

///

## 進階使用者指南

還有一個**進階使用者指南**你可以稍後閱讀。

**進階使用者指南**建立在這個教學之上，使用相同的概念，並教你一些額外的功能。

  static <K extends @Nullable Object> ObjectCountHashMap<K> create() {
    return new ObjectCountHashMap<K>();
  }

  /**
   * Creates a {@code ObjectCountHashMap} instance, with a high enough "initial capacity" that it
   * <i>should</i> hold {@code expectedSize} elements without growth.
   *
   * @param expectedSize the number of elements you expect to add to the returned set

We will have two triggers for sending config - requests and pushes.

#### Requests

Requests come from the client specifically asking for a set of resources. This could be requesting the initial set of resources on a new connection, or from a new dependency. For example, a push of `Cluster X` referencing `Endpoint Y` may lead to a request for `Endpoint Y` if it is not already known to the client.

	if which curl &>/dev/null; then
		echo "curl is already installed"
	else
		echo "Installing curl:"
		sudo apt install curl -y
	fi

	export GOPATH=/tmp/gopath
	export PATH="${PATH}":"${GOPATH}"/bin

	if which mc &>/dev/null; then
		echo "mc is already installed"
	else
		echo "Installing mc:"
		go install github.com/minio/mc@latest
	fi

	if [ ! -x ./minio.${OLD_VERSION} ]; then

            <id>test</id>

            <!--  The key to this test... -->
            <inherited>false</inherited>

            <goals>
              <goal>compile</goal>
            </goals>
            <phase>install</phase>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

## Example using Python API

### 1. Prerequisites

- Install MinIO Server from [here](https://min.io/docs/minio/linux/index.html#procedure).
- Familiarity with AWS S3 API.
- Familiarity with Python and installing dependencies.

### 2. Install boto3

Install `aws-sdk-python` from AWS SDK for Python official docs [here](https://aws.amazon.com/sdk-for-python/)

### 3. Example

您可以使用以下命令安装 ASGI 兼容服务器：

//// tab | Uvicorn

* <a href="https://www.uvicorn.org/" class="external-link" target="_blank">Uvicorn</a>，一个快如闪电 ASGI 服务器，基于 uvloop 和 httptools 构建。

<div class="termy">

```console
$ pip install "uvicorn[standard]"

---> 100%
```

</div>

/// tip

通过添加`standard`，Uvicorn 将安装并使用一些推荐的额外依赖项。

其中包括`uvloop`，它是`asyncio`的高性能替代品，它提供了巨大的并发性能提升。

///

////

//// tab | Hypercorn

body:
  - type: dropdown
    id: issue-type
    attributes:
      label: Issue type
      description: What type of issue would you like to report?
      multiple: false
      options:
        - Bug
        - Build/Install
        - Performance
        - Support
        - Feature Request
        - Documentation Feature Request
        - Documentation Bug
        - Others
    validations:
      required: true
  - type: markdown

# 请求表单与文件

FastAPI 支持同时使用 `File` 和 `Form` 定义文件和表单字段。

/// info | "说明"

接收上传文件或表单数据，要预先安装 <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>。

例如，`pip install python-multipart`。

///

## 导入 `File` 与 `Form`

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

## 定义 `File` 与 `Form` 参数

创建文件和表单参数的方式与 `Body` 和 `Query` 一样：