{* ../../docs_src/query_params_str_validations/tutorial015_an_py310.py ln[16:19] hl[17] *}

#### Rastgele Bir Item { #a-random-item }

`data.items()` ile, her dictionary öğesi için key ve value içeren tuple’lardan oluşan bir <dfn title="for döngüsüyle üzerinde gezinebileceğimiz bir şey; list, set vb.">yinelemeli nesne</dfn> elde ederiz.

        if (StringUtil.isNotBlank(fessConfig.getIndexDictionaryPrefix())) {
            String dictionaryPath = System.getProperty("fess.dictionary.path", StringUtil.EMPTY);
            if (StringUtil.isBlank(dictionaryPath)) {
                System.setProperty("fess.dictionary.path", fessConfig.getIndexDictionaryPrefix() + "/");
            } else {
                if (!dictionaryPath.endsWith("/")) {

                int | type[Exception],
                Callable[[Request, Any], Coroutine[Any, Any, Response]],
            ]
            | None,
            Doc(
                """
                A dictionary with handlers for exceptions.

                In FastAPI, you would normally use the decorator
                `@app.exception_handler()`.

                Read more in the

    /**
     * Get the value for the key 'index.dictionary.prefix'. <br>
     * The value is, e.g.  <br>
     * comment: Prefix for dictionary index names.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getIndexDictionaryPrefix();

    /**
     * Get the value for the key 'index.dictionary.prefix' as {@link Integer}. <br>

Fess uses OpenSearch/Elasticsearch internally, so you can:

1. Export index mappings and settings from source
2. Apply custom analyzers in Fess's `fess_config.properties`
3. Create synonym dictionaries in Fess's dictionary directory

---

### Apache Solr

For migrating from Apache Solr:

#### Document Export and Import

**Step 1: Export from Solr**

```bash
# Export Solr documents as JSON

    return new CompoundOrdering<>(comparators);
  }

  /**
   * Returns a new ordering which sorts iterables by comparing corresponding elements pairwise until
   * a nonzero result is found; imposes "dictionary order". If the end of one iterable is reached,
   * but not the other, the shorter iterable is considered to be less than the longer one. For

    return new CompoundOrdering<>(comparators);
  }

  /**
   * Returns a new ordering which sorts iterables by comparing corresponding elements pairwise until
   * a nonzero result is found; imposes "dictionary order". If the end of one iterable is reached,
   * but not the other, the shorter iterable is considered to be less than the longer one. For

        `TruncatedNormal` initializers have been changed to match those in
        external Keras.
    *   Breaking change: `model.get_config()` on a Sequential model now returns
        a config dictionary (consistent with other Model instances) instead of a
        list of configs for the underlying layers.

## Bug Fixes and Other Changes

*   C++: