CommonPoolUtil.execute(() -> {
            try (Reader reader = new BufferedReader(new InputStreamReader(body.badWordFile.getInputStream(), getCsvEncoding()))) {
                badWordService.importCsv(reader);
                suggestHelper.storeAllBadWords(false);
            } catch (final Exception e) {
                throw new FessSystemException("Failed to import data.", e);
            }
        });

        // setup condition
        cb.query().addOrderBy_SuggestWord_Asc();

        // search

    }

    /**
     * Imports bad words from a CSV file.
     * @param reader The reader for the CSV data.
     */
    public void importCsv(final Reader reader) {
        @SuppressWarnings("resource")
        final CsvReader csvReader = new CsvReader(reader, new CsvConfig());
        try {

        cb.query().addOrderBy_SuggestWord_Asc();

        // search

    }

    /**
     * Imports elevate words from a CSV file.
     * Expected CSV format: SuggestWord, Reading, Permissions, Labels, Boost
     *
     * @param reader the Reader containing CSV data to import
     */
    public void importCsv(final Reader reader) {
        final PermissionHelper permissionHelper = ComponentUtil.getPermissionHelper();

        CommonPoolUtil.execute(() -> {
            try (Reader reader = new BufferedReader(new InputStreamReader(form.badWordFile.getInputStream(), getCsvEncoding()))) {
                badWordService.importCsv(reader);
                suggestHelper.storeAllBadWords(false);
            } catch (final Exception e) {
                throw new FessSystemException("Failed to import data.", e);
            }
        });

        CommonPoolUtil.execute(() -> {
            try (Reader reader = new BufferedReader(new InputStreamReader(body.elevateWordFile.getInputStream(), getCsvEncoding()))) {
                elevateWordService.importCsv(reader);
                suggestHelper.storeAllElevateWords(false);
            } catch (final Exception e) {
                throw new FessSystemException("Failed to import data.", e);
            }
        });

        CommonPoolUtil.execute(() -> {
            try (Reader reader = new BufferedReader(new InputStreamReader(form.elevateWordFile.getInputStream(), getCsvEncoding()))) {
                elevateWordService.importCsv(reader);
                suggestHelper.deleteAllElevateWord(false);
                suggestHelper.storeAllElevateWords(false);
            } catch (final Exception e) {

        }));
    }

    /**
     * Imports crawling information and parameters from a CSV file.
     * The CSV format expected is: SessionId, SessionCreatedTime, Key, Value, CreatedTime.
     * Creates new crawling sessions if they don't exist and adds parameters to them.
     *
     * @param reader the Reader containing CSV data to import
     */
    public void importCsv(final Reader reader) {

  @Deprecated(
    message = "Moved to extension function.",
    replaceWith =
      ReplaceWith(
        expression = "callFactory.asEventSourceFactory()",
        imports = ["okhttp3.sse.EventSource.Factory.Companion.asEventSourceFactory"],
      ),
    level = DeprecationLevel.WARNING,
  )
  @JvmStatic

```Python hl_lines="3" title="app/routers/items.py"
{!../../docs_src/bigger_applications/app/routers/items.py!}
```

#### How relative imports work { #how-relative-imports-work }

/// tip

If you know perfectly how imports work, continue to the next section below.

///

A single dot `.`, like in:

```Python
from .dependencies import get_token_header
```

would mean:

<div class="termy">

```console
$ python myapp.py
```

</div>

but is not called when another file imports it, like in:

```Python
from myapp import app
```

#### More details { #more-details }

Let's say your file is named `myapp.py`.

If you run it with:

<div class="termy">

```console