assertToStringWorks(
        CharMatcher.inRange('a', 'z')
            .or(CharMatcher.inRange('A', 'Z'))
            .or(CharMatcher.inRange('0', '9'))
            .or(CharMatcher.is('_')),
        "CharMatcher.inRange('\\u0061', '\\u007A')"
            + ".or(CharMatcher.inRange('\\u0041', '\\u005A'))"
            + ".or(CharMatcher.inRange('\\u0030', '\\u0039'))"
            + ".or(CharMatcher.is('\\u005F'))");

            <li>Logical operators: {@code &&} (AND), {@code ||} (OR), {@code not(...)}</li>
            <li>Functions: {@code exists(...)}, {@code missing(...)}, {@code matches(...)}, {@code inrange(...)}, and more</li>
            </ul>

            <h2>Supported Functions</h2>

            <p>The following functions are supported in condition expressions:</p>

            <ul>

  }

  private static final CharMatcher DASH_MATCHER = CharMatcher.anyOf("-_");

  private static final CharMatcher DIGIT_MATCHER = CharMatcher.inRange('0', '9');

  private static final CharMatcher LETTER_MATCHER =
      CharMatcher.inRange('a', 'z').or(CharMatcher.inRange('A', 'Z'));

  private static final CharMatcher PART_CHAR_MATCHER =
      DIGIT_MATCHER.or(LETTER_MATCHER).or(DASH_MATCHER);

  /**

{* ../../docs_src/bigger_applications/app_an_py310/main.py hl[14:17] title["app/main.py"] *}

De cette façon, le `APIRouter` original restera inchangé, afin que nous puissions toujours partager ce même fichier `app/internal/admin.py` avec d'autres projets de l'organisation.

Le résultat est que, dans notre application, chacun des *chemins d'accès* du module `admin` aura :