---

Then the next concepts to consider are all about the program running your actual API (e.g. Uvicorn).

## Program and Process { #program-and-process }

We will talk a lot about the running "**process**", so it's useful to have clarity about what it means, and what's the difference with the word "**program**".

### What is a Program { #what-is-a-program }

The word **program** is commonly used to describe many things:

* `/usr/bin`
* `/bin`
* `/usr/sbin`
* `/sbin`

////

//// tab | Windows

```plaintext
C:\Program Files\Python312\Scripts;C:\Program Files\Python312;C:\Windows\System32
```

これは、OSはプログラムを見つけるために以下のディレクトリを探す、ということを意味します:

* `C:\Program Files\Python312\Scripts`
* `C:\Program Files\Python312`
* `C:\Windows\System32`

////

And then, there would be another program (in some cases it's another program, in some cases it could be the same TLS Termination Proxy) that would talk to Let's Encrypt, and renew the certificate(s).

<img src="/img/deployment/https/https.drawio.svg">

The **TLS certificates** are **associated with a domain name**, not with an IP address.

```requirements.txt
fastapi[standard]==0.113.0
pydantic==2.8.0
```

///

## Execute seu programa { #run-your-program }

Depois de ativar o ambiente virtual, você pode executar seu programa, e ele usará o Python dentro do seu ambiente virtual com os pacotes que você instalou lá.

<div class="termy">

```console
$ python main.py

Hello World

</div>

////

Eso significa que el programa `python` que se utilizará es el que está **en el entorno virtual**.

Usas `which` en Linux y macOS y `Get-Command` en Windows PowerShell.

La forma en que funciona ese comando es que irá y revisará la variable de entorno `PATH`, pasando por **cada path en orden**, buscando el programa llamado `python`. Una vez que lo encuentre, te **mostrará el path** a ese programa.

  conçu pour Django Channels.

## Machine serveur et programme serveur

Il y a un petit détail sur les noms à garder à l'esprit. 💡

Le mot "**serveur**" est couramment utilisé pour désigner à la fois l'ordinateur distant/cloud (la machine physique ou virtuelle) et également le programme qui s'exécute sur cette machine (par exemple, Uvicorn).

* **Coroutines**

## Asenkron kod

Asenkron kod programlama dilinin 💬 bilgisayara / programa 🤖 kodun bir noktasında, *başka bir kodun* bir yerde bitmesini 🤖 beklemesi gerektiğini söylemenin bir yoludur. Bu *başka koda* "slow-file" denir 📝.

Böylece, bu süreçte bilgisayar "slow-file" 📝 tamamlanırken gidip başka işler yapabilir.

    /**
     * @throws Exception
     */
    public void testEncode() throws Exception {
        assertEquals("Program+Files", URLUtil.encode("Program Files", "UTF-8"));
    }

    /**
     * @throws Exception
     */
    public void testDecode() throws Exception {
        assertEquals("Program Files", URLUtil.decode("Program+Files", "UTF-8"));
    }

    /**
     * @throws Exception
     */

        assertContentType("text/x-csrc", "extractor/program/test.c", "test.c");
        assertContentType("text/x-c++src", "extractor/program/test.cpp", "test.cpp");
        assertContentType("text/x-chdr", "extractor/program/test.h", "test.h");
        assertContentType("text/x-c++hdr", "extractor/program/test.hpp", "test.hpp");
        assertContentType("text/x-java-source", "extractor/program/test.java", "test.java");

     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Application startup complete.
```

</div>

El programa de línea de comandos llamado `fastapi` es **FastAPI CLI**.

FastAPI CLI toma el path de tu programa Python (por ejemplo, `main.py`), detecta automáticamente la `FastAPI` instance (comúnmente llamada `app`), determina el proceso de import correcto, y luego la sirve.