}

// Seek implements the [io.Seeker] interface.
func (r *Reader) Seek(offset int64, whence int) (int64, error) {
	r.prevRune = -1
	var abs int64
	switch whence {
	case io.SeekStart:
		abs = offset
	case io.SeekCurrent:
		abs = r.i + offset
	case io.SeekEnd:
		abs = int64(len(r.s)) + offset
	default:
		return 0, errors.New("bytes.Reader.Seek: invalid whence")
	}
	if abs < 0 {

And you can also declare body parameters as optional, by setting the default to `None`:

{* ../../docs_src/body_multiple_params/tutorial001_an_py310.py hl[18:20] *}

/// note

Notice that, in this case, the `item` that would be taken from the body is optional. As it has a `None` default value.

///

## Multiple body parameters { #multiple-body-parameters }

# Deploy FastAPI on Cloud Providers { #deploy-fastapi-on-cloud-providers }

You can use virtually **any cloud provider** to deploy your FastAPI application.

In most of the cases, the main cloud providers have guides to deploy FastAPI with them.

## Cloud Providers - Sponsors { #cloud-providers-sponsors }

    int readDataWireFormat(final byte[] buffer, final int bufferIndex, final int len) {
        return switch (informationLevel) {
        case SMB_INFO_ALLOCATION -> readSmbInfoAllocationWireFormat(buffer, bufferIndex);
        case SMB_QUERY_FS_SIZE_INFO -> readSmbQueryFSSizeInfoWireFormat(buffer, bufferIndex);
        case SMB_FS_FULL_SIZE_INFORMATION -> readFsFullSizeInformationWireFormat(buffer, bufferIndex);
        default -> 0;
        };
    }

    state = State.DONE;
    return null;
  }

  @Override
  public final boolean hasNext() {
    checkState(state != State.FAILED);
    switch (state) {
      case DONE:
        return false;
      case READY:
        return true;
      default:
    }
    return tryToComputeNext();
  }

  private boolean tryToComputeNext() {
    state = State.FAILED; // temporary pessimism

			switch hkv.Key {
			case config.EtcdSubSys:
				off = !etcd.Enabled(item.Config)
			case config.StorageClassSubSys:
				off = !storageclass.Enabled(item.Config)
			case config.PolicyPluginSubSys:
				off = !polplugin.Enabled(item.Config)
			case config.IdentityOpenIDSubSys:
				off = !openid.Enabled(item.Config)
			case config.IdentityLDAPSubSys:
				off = !xldap.Enabled(item.Config)

        .addQueryParameter("client_id", clientId)
        .addQueryParameter("scope", scopes)
        .addQueryParameter("redirect_uri", redirectUrl.toString())
        .addQueryParameter("state", state.base64());

    if (team != null) {
      builder.addQueryParameter("team", team);
    }

    return builder.build();
  }

  /** See https://api.slack.com/methods/oauth.access. */

                switch (saveImage(input, outputFile)) {
                case OK:
                    created = true;
                    break;
                case FAILED:
                    logger.warn("Failed to create thumbnail: {} -> {}", thumbnailId, responseData.getUrl());
                    break;
                case INVALID_SIZE:

	srs.Secure = st.Secure
	switch {
	case st.Completed:
		srs.ReplicatedSize += st.TransferSize
		srs.ReplicatedCount++
		if st.TransferDuration > 0 {
			srs.Latency.update(st.TransferSize, st.TransferDuration)
			srs.updateXferRate(st.TransferSize, st.TransferDuration)
		}
	case st.Failed:
		srs.Failed.addsize(st.TransferSize, st.Err)
	case st.Pending:
	}
	sr.M[dID] = srs
}

		switch len(parts) {
		default:
			t.Errorf("%s:%d: unable to understand comments: %s", input, lineno, line)
		case 1:
			// no comment
		case 2:
			// might be printed form or hex
			note := strings.TrimSpace(parts[1])
			if isHexes(note) {
				hexes = note
			} else {
				printed = note
			}
		case 3:
			// printed form, then hex
			printed = strings.TrimSpace(parts[1])
			hexes = strings.TrimSpace(parts[2])