## প্রয়োজনীয়তা গুলো

Python 3.7+

FastAPI কিছু দানবেদের কাঁধে দাঁড়িয়ে আছে:

- <a href="https://www.starlette.io/" class="external-link" target="_blank">Starlette</a> ওয়েব অংশের জন্য.
- <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> ডেটা অংশগুলির জন্য.

## ইনস্টলেশন প্রক্রিয়া

<div class="termy">

/// note | Szczegóły techniczne

`FastAPI` jest klasą, która dziedziczy bezpośrednio z `Starlette`.

Oznacza to, że możesz korzystać ze wszystkich funkcjonalności <a href="https://www.starlette.io/" class="external-link" target="_blank">Starlette</a> również w `FastAPI`.

///

### Krok 2: utwórz instancję `FastAPI`

{*../../docs_src/first_steps/tutorial001.py hl[3] *}

In contrast to a "**container image**" that is the stored static contents, a "**container**" normally refers to the running instance, the thing that is being **executed**.

When the **container** is started and running (started from a **container image**) it could create or change files, environment variables, etc. Those changes will exist only in that container, but would not persist in the underlying container image (would not be saved to disk).

    if (start < 0 || start > size) {
      return badPositionIndex(start, size, "start index");
    }
    if (end < 0 || end > size) {
      return badPositionIndex(end, size, "end index");
    }
    // end < start
    return lenientFormat("end index (%s) must not be less than start index (%s)", end, start);
  }

Here are some possible ideas:

* An "Init Container" in Kubernetes that runs before your app container
* A bash script that runs the previous steps and then starts your application
    * You would still need a way to start/restart *that* bash script, detect errors, etc.

/// tip

<img src="/img/tutorial/response-status-code/image02.png">

/// note | Technical Details

You could also use `from starlette import status`.

**FastAPI** provides the same `starlette.status` as `fastapi.status` just as a convenience for you, the developer. But it comes directly from Starlette.

///

## Changing the default { #changing-the-default }

{* ../../docs_src/first_steps/tutorial001.py hl[1] *}

`FastAPI`는 당신의 API를 위한 모든 기능을 제공하는 파이썬 클래스입니다.

/// note | 기술 세부사항

`FastAPI`는 `Starlette`를 직접 상속하는 클래스입니다.

`FastAPI`로 <a href="https://www.starlette.io/" class="external-link" target="_blank">Starlette</a>의 모든 기능을 사용할 수 있습니다.

///

### 2 단계: `FastAPI` "인스턴스" 생성

{* ../../docs_src/first_steps/tutorial001.py hl[3] *}

{* ../../docs_src/first_steps/tutorial001.py h1[1] *}

`FastAPI` 是一個 Python 類別，提供所有 API 的全部功能。

/// note | Technical Details

`FastAPI` 是一個直接繼承自 `Starlette` 的類別。

你同樣可以透過 `FastAPI` 來使用 <a href="https://www.starlette.io/" class="external-link" target="_blank">Starlette</a> 所有的功能。

///

### 第二步：建立一個 `FastAPI` 「實例」

{* ../../docs_src/first_steps/tutorial001.py h1[3] *}

這裡的 `app` 變數將會是 `FastAPI` 類別的「實例」。

     * @return the lease key
     */
    public Smb2LeaseKey getLeaseKey() {
        return leaseKey;
    }

    /**
     * Gets the lease state granted by the server for V2
     * @return the granted lease state
     */
    public int getLeaseState() {
        return leaseState;
    }

    /**
     * Gets the lease flags from the V2 server response
     * @return the lease flags

*/\nexport default function removeEventListeners(reference, state) {\n  // Remove resize event listener on window\n  getWindow(reference).removeEventListener('resize', state.updateBound);\n\n  // Remove scroll event listener on scroll parents\n  state.scrollParents.forEach(target => {\n    target.removeEventListener('scroll', state.updateBound);\n  });\n\n  // Reset state\n  state.updateBound = null;\n  state.scrollParents = [];\n  state.scrollElement = null;\n  state.eventsEnabled = false;\n  return...