For example, this custom validator checks that the item ID starts with `isbn-` for an <abbr title="International Standard Book Number">ISBN</abbr> book number or with `imdb-` for an <abbr title="Internet Movie Database: a website with information about movies">IMDB</abbr> movie URL ID:

{* ../../docs_src/query_params_str_validations/tutorial015_an_py310.py hl[5,16:19,24] *}

/// info

This is available with Pydantic version 2 or above. 😎

///

            skipMe = new ArrayList<>(3);
          }
          if (!foundAndRemovedExactReference(skipMe, moved.toTrickle)) {
            forgetMeNot.add(moved.toTrickle);
          }
          if (!foundAndRemovedExactReference(forgetMeNot, moved.replaced)) {
            skipMe.add(moved.replaced);
          }
        }
        cursor--;
        nextCursor--;

				"application/vnd.minisoft-hp3000-save",
				"application/vnd.mitsubishi.misty-guard.trustweb",
				"application/vnd.mobius.daf",
				"application/vnd.mobius.dis",
				"application/vnd.mobius.mbk",
				"application/vnd.mobius.mqy",
				"application/vnd.mobius.msl",
				"application/vnd.mobius.plc",
				"application/vnd.mobius.txf",
				"application/vnd.mophun.application",
				"application/vnd.mophun.certificate",

{* ../../docs_src/body_nested_models/tutorial007_py310.py hl[7,12,18,21,25] *}

/// info

Notice how `Offer` has a list of `Item`s, which in turn have an optional list of `Image`s

///

## Bodies of pure lists { #bodies-of-pure-lists }

If the top level value of the JSON body you expect is a JSON `array` (a Python `list`), you can declare the type in the parameter of the function, the same as in Pydantic models:

```Python

///

## Use cases { #use-cases }

Some use cases include:

* Converting non-JSON request bodies to JSON (e.g. [`msgpack`](https://msgpack.org/index.html)).
* Decompressing gzip-compressed request bodies.
* Automatically logging all request bodies.

## Handling custom request body encodings { #handling-custom-request-body-encodings }

    private final File file;
    private final ImmutableSet<FileWriteMode> modes;

    private FileByteSink(File file, FileWriteMode... modes) {
      this.file = checkNotNull(file);
      this.modes = ImmutableSet.copyOf(modes);
    }

    @Override
    public FileOutputStream openStream() throws IOException {
      return new FileOutputStream(file, modes.contains(APPEND));
    }

    @Override

Vendoring in std and cmd
========================

The Go command maintains copies of external packages needed by the
standard library in the src/vendor and src/cmd/vendor directories.

There are two modules, std and cmd, defined in src/go.mod and
src/cmd/go.mod. When a package outside std or cmd is imported
by a package inside std or cmd, the import path is interpreted
as if it had a "vendor/" prefix. For example, within "crypto/tls",

But that is still not that useful.

Let's make it give us the current user.

## Create a user model { #create-a-user-model }

First, let's create a Pydantic user model.

The same way we use Pydantic to declare bodies, we can use it anywhere else:

{* ../../docs_src/security/tutorial002_an_py310.py hl[5,12:6] *}

## Create a `get_current_user` dependency { #create-a-get-current-user-dependency }

/// info | Інформація

Зверніть увагу, що в моделі `Offer` є список `Item`ів, які, своєю чергою, можуть мати необов'язковий список `Image`ів.

///

## Тіла запитів, що складаються зі списків { #bodies-of-pure-lists }

Якщо верхній рівень JSON тіла, яке ви очікуєте, є JSON `масивом` (у Python — `list`), ви можете оголосити тип у параметрі функції, як і в моделях Pydantic:

```Python
images: list[Image]
```

    return Platform.stringIsNullOrEmpty(string);
  }

  /**
   * Returns a string, of length at least {@code minLength}, consisting of {@code string} prepended
   * with as many copies of {@code padChar} as are necessary to reach that length. For example,
   *
   * <ul>
   *   <li>{@code padStart("7", 3, '0')} returns {@code "007"}
   *   <li>{@code padStart("2010", 3, '0')} returns {@code "2010"}