Найпростіший файл FastAPI може виглядати так:

{* ../../docs_src/first_steps/tutorial001.py *}

Скопіюйте це до файлу `main.py`.

Запустіть сервер:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:single">main.py</u>
<font color="#3465A4">INFO    </font> Using path <font color="#3465A4">main.py</font>

maven-core-it file:///${basedir}/repo true true . pom.xml src/** src/main/resources src/main/java/org/apache/maven/its/mng3906/SomeClass.java src/main/java/org/apache/maven/its/mng3906/SomeClass.java package org.apache.maven.its.mng3906; public class SomeClass { } META-INF/maven/org.apache.maven.its.mng3906/a/pom.xml 4.0.0 org.apache.maven.its.mng3906 a 0.1 jar maven-core-it file:///${basedir}/repo true true . pom.xml src/** src/main/resources META-INF/maven/org.apache.maven.its.mng3906/a/pom.properties...

maven-core-it file:///${basedir}/repo true true . pom.xml src/** src/main/resources src/main/java/org/apache/maven/its/mng3906/SomeClass.java src/main/java/org/apache/maven/its/mng3906/SomeClass.java package org.apache.maven.its.mng3906; public class SomeClass { } META-INF/maven/org.apache.maven.its.mng3906/b/pom.xml 4.0.0 org.apache.maven.its.mng3906 b 0.1 jar maven-core-it file:///${basedir}/repo true true . pom.xml src/** src/main/resources META-INF/maven/org.apache.maven.its.mng3906/b/pom.properties...

   <span style="background-color:#007166"><font color="#D3D7CF"> module </font></span>  🐍 main.py

     <span style="background-color:#007166"><font color="#D3D7CF"> code </font></span>  Importing the FastAPI app object from the module with the
             following code:

                        "description": "Successful Response",
                        "content": {"application/json": {"schema": {}}},
                    }
                },
                "summary": "Read Main",
                "operationId": "read_main_app_get",
            }
        }
    },
}
openapi_schema_sub = {
    "openapi": "3.1.0",
    "info": {"title": "FastAPI", "version": "0.1.0"},
    "paths": {

fun Project.applyOsgiMultiplatform(vararg bndProperties: String) {
  // BND is incompatible with Kotlin/Multiplatform because it assumes the JVM source set's name is
  // 'main'. Work around this by creating a 'main' source set that forwards to 'jvmMain'.
  //
  // The forwarding SourceSet also needs to fake out some task names to prevent them from being
  // registered twice.
  //
  // https://github.com/bndtools/bnd/issues/6590

        // Set values in main thread
        UrlQueue<?> mainUrlQueue = createMockUrlQueue("main-thread", "http://main.com");
        CrawlingParameterUtil.setUrlQueue(mainUrlQueue);

        CrawlerContext mainContext = new CrawlerContext();
        mainContext.setSessionId("main-context");
        CrawlingParameterUtil.setCrawlerContext(mainContext);

        // Verify main thread values

plugins {
    java
}

val validateTaskName = "validatePlugins"
val reportFileName = "task-properties/report.txt"

tasks.register<ValidatePlugins>(validateTaskName) {
    val main = project.sourceSets.main.get()
    classes.from(main.output)
    classpath.from(main.runtimeClasspath)
    outputFile = project.reporting.baseDirectory.file(reportFileName)
    enableStricterValidation = true

from fastapi.cli import main

```
.
├── app
│   ├── __init__.py
│   └── main.py
```

`main.py` 파일 안에 **FastAPI** app 을 만들었습니다:

{* ../../docs_src/app_testing/main.py *}

### 테스트 파일

테스트를 위해 `test_main.py` 라는 파일을 생성할 수 있습니다. 이 파일은 동일한 Python 패키지(즉, `__init__.py` 파일이 있는 동일한 디렉터리)에 위치할 수 있습니다.

``` hl_lines="5"
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```