<div class="termy">

```console
$ pip install -r requirements.txt
---> 100%
Successfully installed fastapi pydantic
```

</div>

/// info

There are other formats and tools to define and install package dependencies.

///

### Create the **FastAPI** Code { #create-the-fastapi-code }

* Create an `app` directory and enter it.
* Create an empty file `__init__.py`.

/// warning | Advertencia

Asegúrate de **siempre** usar la **forma exec** de la instrucción `CMD`, como se explica a continuación.

///

#### Usar `CMD` - Forma Exec { #use-cmd-exec-form }

La instrucción Docker <a href="https://docs.docker.com/reference/dockerfile/#cmd" class="external-link" target="_blank">`CMD`</a> se puede escribir usando dos formas:

✅ **Forma Exec**:

```Dockerfile
# ✅ Haz esto

   * 4648 section 8</a>, Base 16 Encoding. (This is the same as the base 16 encoding from <a
   * href="http://tools.ietf.org/html/rfc3548#section-6">RFC 3548</a>.) This is commonly known as
   * "hexadecimal" format.
   *
   * <p>No padding is necessary in base 16, so {@link #withPadChar(char)} and {@link #omitPadding()}
   * have no effect.
   *
   * <p>No line feeds are added by default, as per <a

labels.advance_search_should_queries=mit mindestens einem der Wörter
labels.advance_search_not_queries=ohne die Wörter
labels.advance_search_filetype=Dateityp
labels.advance_search_filetype_default=Beliebiges Format
labels.advance_search_filetype_html=HTML
labels.advance_search_filetype_pdf=PDF
labels.advance_search_filetype_word=MS Word
labels.advance_search_filetype_excel=MS Excel

labels.searchoptions_menu_labels=Etykiety
labels.error_title=Błąd
labels.system_error_title=Błąd systemu
labels.contact_site_admin=Skontaktuj się z administratorem witryny.
labels.request_error_title=Nieprawidłowy format żądania.
labels.bad_request=Żądanie do adresu URL jest nieprawidłowe.
labels.page_not_found_title=Strona nie znaleziona.
labels.check_url=Sprawdź adres URL.
labels.user_name=Nazwa użytkownika
labels.login=Zaloguj się

from fastapi import FastAPI, Form
from pydantic import BaseModel

app = FastAPI()


class FormData(BaseModel):
    username: str
    password: str
    model_config = {"extra": "forbid"}


@app.post("/login/")
async def login(data: Annotated[FormData, Form()]):
    return data
```

    * `kubectl create secret` has a new option `--from-env-file` that populates a secret from file which follows a key=val format for each line.

  * Printing/describe

	tags["pool"] = strconv.Itoa(er.poolIndex)
	tags["merrs"] = joinErrs(errs)
	tags["derrs"] = fmt.Sprintf("%v", dataErrsByPart)
	if m.IsValid() {
		tags["sz"] = strconv.FormatInt(m.Size, 10)
		tags["mt"] = m.ModTime.Format(iso8601Format)
		tags["d:p"] = fmt.Sprintf("%d:%d", m.Erasure.DataBlocks, m.Erasure.ParityBlocks)
	} else {
		tags["invalid"] = "1"

///

/// warning | Atenção

Certifique-se de **sempre** usar a **forma exec** da instrução `CMD`, como explicado abaixo.

///

#### Use `CMD` - Forma Exec { #use-cmd-exec-form }

A instrução <a href="https://docs.docker.com/reference/dockerfile/#cmd" class="external-link" target="_blank">`CMD`</a> no Docker pode ser escrita de duas formas:

✅ Forma **Exec**:

```Dockerfile
# ✅ Faça assim

   * Constructs a new {@code CacheBuilder} instance with the settings specified in {@code spec}.
   * This is especially useful for command-line configuration of a {@code CacheBuilder}.
   *
   * @param spec a String in the format specified by {@link CacheBuilderSpec}
   * @since 12.0
   */
  @GwtIncompatible // To be supported
  public static CacheBuilder<Object, Object> from(String spec) {
    return from(CacheBuilderSpec.parse(spec));
  }