# Aprender

Nesta parte da documentação encontramos as seções introdutórias e os tutoriais para aprendermos como usar o **FastAPI**.

    state = str(uuid4())
    params = {"client_id": client_id,
              "response_type": "code",
              "state": state,
              "redirect_uri": callback_uri,
              "scope": "openid"}

    url = authorize_url + "?" + urllib.parse.urlencode(params)
    return url


@app.route('/oauth2/callback')
def callback():
    error = request.args.get('error', '')
    if error:

/**
 * JSON utilities.
 *
 * @author shinsuke
 *
 */
public class JsonUtil {

    /**
     * Defualt constructor.
     */
    protected JsonUtil() {
    }

    /**
     * Escapes a value as Json string.
     *
     * @param value input
     * @return escaped string.
     */
    public static String escape(final String value) {
        if (value == null) {
            return null;
        }

comments, commits, code, wiki edits, issues, and other contributions that are
not aligned to this Code of Conduct, and will communicate reasons for moderation
decisions when appropriate.

## Scope

This Code of Conduct applies within all community spaces and also applies when
an individual is officially representing the community in public spaces.

   * (used as the reference iterator) against a {@code PeekingIterator} that *wraps* such an
   * iterator (used as the target iterator).
   *
   * <p>This IteratorTester makes copies of the master so that it can later verify that {@link
   * PeekingIterator#remove()} removes the same elements as the reference's iterator {@code
   * remove()}.
   */

    builder.add("baz");
    assertTrue(list.array != builder.contents);
  }

  @SuppressWarnings("ModifiedButNotUsed")
  @GwtIncompatible // actually allocates nCopies
  @J2ktIncompatible // actually allocates nCopies
  public void testAddOverflowCollection() {
    ImmutableList.Builder<String> builder = ImmutableList.builder();
    for (int i = 0; i < 100; i++) {
      builder.add("a");
    }

internal class DerWriter(
  sink: BufferedSink,
) {
  /** A stack of buffers that will be concatenated once we know the length of each. */
  private val stack = mutableListOf(sink)

  /** Type hints scoped to the call stack, manipulated with [pushTypeHint] and [popTypeHint]. */
  private val typeHintStack = mutableListOf<Any?>()

  /**
   * The type hint for the current object. Used to pick adapters based on other fields, such as

  /** Creates a new {@code CharBuffer} for buffering reads or writes. */
  static CharBuffer createBuffer() {
    return CharBuffer.allocate(DEFAULT_BUF_SIZE);
  }

  private CharStreams() {}

  /**
   * Copies all characters between the {@link Readable} and {@link Appendable} objects. Does not
   * close or flush either object.
   *
   * @param from the object to read from
   * @param to the object to write to

        </ul>
        where
        {@code ${scope}} is the value of the {@link #scope} element (typically {@code main} or {@code test}),
        {@code ${lang}} is the value of the {@link #lang} element (typically {@code java} or {@code resources}),
        and {@code ${module}} is the optional {@link #module} element.
        ]]>
      </description>
      <version>4.1.0+</version>

                {
                    exclusions.add(  e.getGroupId() + ":" + e.getArtifactId() );
                }
            }
        }

        ArtifactFilter scopeFilter = new ScopeArtifactFilter( scope );

        ArtifactFilter filter;

        if ( ! exclusions.isEmpty() )
        {
            filter = new AndArtifactFilter( Arrays.asList( new ArtifactFilter[]{