Isso ocorre por que, por padrão, o FastAPI irá verificar cada item dentro do dicionário e garantir que ele seja serializável para JSON, utilizando o mesmo[Codificador Compatível com JSON](../tutorial/encoder.md){.internal-link target=_blank} explicado no tutorial. Isso permite que você retorne **objetos abstratos**, como modelos do banco de dados, por exemplo.

  static ParameterizedType newParameterizedType(Class<?> rawType, Type... arguments) {
    return new ParameterizedTypeImpl(
        ClassOwnership.JVM_BEHAVIOR.getOwnerType(rawType), rawType, arguments);
  }

  /** Decides what owner type to use for constructing {@link ParameterizedType} from a raw class. */
  private enum ClassOwnership {
    OWNED_BY_ENCLOSING_CLASS {
      @Override
      @Nullable Class<?> getOwnerType(Class<?> rawType) {

            // Just returning an Integer with the index here is faster, but requires a lot of if/then/else to check for
            // -1
            //  or QUALIFIERS.size and then resort to lexical ordering. Most comparisons are decided by the first
            // character,
            // so this is still fast. If more characters are needed then it requires a lexical sort anyway.

            buffer.enc_ndr_long(request.getFlags());
        }
        
        @Override
        public void decode_out(NdrBuffer buffer) throws NdrException {
            // Decode WitnessRegister response
            response = new WitnessRegisterResponse();
            response.setRegistrationId(buffer.dec_ndr_string());
            response.setReturnCode(buffer.dec_ndr_long());
        }

        case 3:
        case 4:
        case 5:
            final byte[] ntlmClientChallengeInfo = type2.getTargetInformation();
            final List<AvPair> avPairs = ntlmClientChallengeInfo != null ? AvPairs.decode(ntlmClientChallengeInfo) : null;

            // if targetInfo has an MsvAvTimestamp
            // client should not send LmChallengeResponse

            }
            final String docId = docIdObj.toString();
            final String queryId = request.getParameter("queryId");

            final String[] docIds = userInfoHelper.getResultDocIds(URLDecoder.decode(queryId, Constants.UTF_8));
            if (docIds == null) {
                throw new WebApiException(HttpServletResponse.SC_BAD_REQUEST, "No searched urls.");
            }

            searchHelper

pkg encoding/binary, const MaxVarintLen32 = 5
pkg encoding/binary, const MaxVarintLen64 = 10
pkg encoding/csv, method (*Writer) Error() error
pkg encoding/json, method (*Decoder) Buffered() io.Reader
pkg encoding/json, method (*Decoder) UseNumber()
pkg encoding/json, method (Number) Float64() (float64, error)
pkg encoding/json, method (Number) Int64() (int64, error)
pkg encoding/json, method (Number) String() string

n}else n||t||s(o)}}_initializeTargetsAndObservables(){this._targetLinks=new Map,this._observableSections=new Map;const t=K.find($e,this._config.target);for(const e of t){if(!e.hash||d(e))continue;const t=K.findOne(decodeURI(e.hash),this._element);h(t)&&(this._targetLinks.set(decodeURI(e.hash),e),this._observableSections.set(e.hash,t))}}_process(t){this._activeTarget!==t&&(this._clearActiveClass(this._config.target),this._activeTarget=t,t.classList.add(Fe),this._activateParents(t),F.trigger(this....

///

### <a href="https://github.com/encode/apistar" class="external-link" target="_blank">APIStar</a> (<= 0.5)

Juste avant de décider de développer **FastAPI**, j'ai trouvé le serveur **APIStar**. Il contenait presque tout ce
que je recherchais et avait un beau design.

		dec := json.NewDecoder(bytes.NewReader(out))
		for {
			var pkg struct {
				ImportPath, Dir string
				ImportMap       map[string]string
				Standard        bool
			}
			err := dec.Decode(&pkg)
			if err == io.EOF {
				break
			}
			if err != nil {
				log.Fatalf("go list: invalid output: %v", err)
			}

			// - Package "unsafe" contains special signatures requiring