Because the editor knows the types of the variables, you don't only get completion, you also get error checks:

<img src="/img/python-types/image04.png">

Now you know that you have to fix it, convert `age` to a string with `str(age)`:

{* ../../docs_src/python_types/tutorial004_py39.py hl[2] *}

## Declaring types { #declaring-types }

You just saw the main place to declare type hints. As function parameters.

     *
     * @param group the group entity to store
     */
    public void store(final Group group) {
        ComponentUtil.getLdapManager().insert(group);

        groupBhv.insertOrUpdate(group, op -> {
            op.setRefreshPolicy(Constants.TRUE);
        });

    }

    /**

        sb.append(dm).append(value);
        sb.append(dm).append(virtualHost);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================

        Node node = doResolve(link, classMetaData, listener);
        if (node != null) {
            return node;
        }

        listener.warning(String.format("Could not convert Javadoc link '%s'", link));
        Element element = document.createElement("UNHANDLED-LINK");
        element.appendChild(document.createTextNode(link));
        return element;
    }

     */
    public void store(final String dictId, final StopwordsItem stopwordsItem) {
        getStopwordsFile(dictId).ifPresent(file -> {
            if (stopwordsItem.getId() == 0) {
                file.insert(stopwordsItem);
            } else {
                file.update(stopwordsItem);
            }
        });
    }

    /**
     * Deletes a stopword item from the specified dictionary.
     *

     */
    public void store(final String dictId, final SynonymItem synonymItem) {
        getSynonymFile(dictId).ifPresent(file -> {
            if (synonymItem.getId() == 0) {
                file.insert(synonymItem);
            } else {
                file.update(synonymItem);
            }
        });
    }

    /**
     * Deletes a synonym item from the specified dictionary.
     *

        sb.append(dm).append(updatedBy);
        sb.append(dm).append(updatedTime);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.smb1.util;

/**
 * Utility class for Base64 encoding and decoding operations.
 * Provides methods to convert between binary data and Base64 encoded strings.
 */
public class Base64 {

    /**
     * Private constructor to prevent instantiation of this utility class.
     */
    private Base64() {

                builder.append(line);
                builder.append("\n");
            }
        } catch (IOException e) {
            throw UncheckedException.throwAsUncheckedException(e);
        }
        input.insert(pos, builder.toString().trim());
    }

    public char getFirst() {
        return input.charAt(pos);
    }

        sb.append(dm).append(updatedTime);
        sb.append(dm).append(virtualHost);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================