* limitations under the License.
 */

package com.google.common.util.concurrent;

import static com.google.common.truth.Truth.assertThat;
import static com.google.common.util.concurrent.Callables.returning;
import static com.google.common.util.concurrent.Futures.getDone;
import static com.google.common.util.concurrent.TestPlatform.verifyThreadWasNotInterrupted;

import com.google.common.annotations.GwtCompatible;

 * limitations under the License.
 */

package com.google.common.util.concurrent;

import static com.google.common.truth.Truth.assertThat;
import static com.google.common.util.concurrent.Callables.returning;
import static com.google.common.util.concurrent.Futures.getDone;
import static com.google.common.util.concurrent.TestPlatform.verifyThreadWasNotInterrupted;

import com.google.common.annotations.GwtCompatible;

Eine Python-Klasse ist also auch ein **Callable**.

Darum können Sie in **FastAPI** auch eine Python-Klasse als Abhängigkeit verwenden.

Was FastAPI tatsächlich prüft, ist, ob es sich um ein „Callable“ (Funktion, Klasse oder irgendetwas anderes) handelt und ob die Parameter definiert sind.

    return new WrappingExecutorService(service) {
      @Override
      protected <T extends @Nullable Object> Callable<T> wrapTask(Callable<T> callable) {
        return Callables.threadRenaming(callable, nameSupplier);
      }

      @Override
      protected Runnable wrapTask(Runnable command) {
        return Callables.threadRenaming(command, nameSupplier);
      }
    };
  }

  /**

  template <class T>
  KeywordArg& operator=(const T obj) {
    value_ = Convert(obj);
    return *this;
  }

  friend class Callable;

 private:
  String key_;
  Handle value_;
};

/// @brief The Callable class for creating callables.
class Callable final : public Handle {
 private:
  // Collect arguments for call
  void CollectArgs(Tuple& args, Dictionary& kwargs, int idx) {}

    return new WrappingExecutorService(service) {
      @Override
      protected <T extends @Nullable Object> Callable<T> wrapTask(Callable<T> callable) {
        return Callables.threadRenaming(callable, nameSupplier);
      }

      @Override
      protected Runnable wrapTask(Runnable command) {
        return Callables.threadRenaming(command, nameSupplier);
      }
    };
  }

  /**

So, a Python class is also a **callable**.

Then, in **FastAPI**, you could use a Python class as a dependency.

What FastAPI actually checks is that it is a "callable" (function, class or anything else) and the parameters defined.

    /**
     * The date of the signature artifact.
     *
     * @see #getDate()
     */
    private Date date;

    private Callable<File> toSignGenerator;

    private Callable<String> classifierGenerator;

    @Nullable
    private Callable<String> nameGenerator;

    /**
     * Creates a signature artifact for the given public artifact.
     *

- [`KT-59251`](https://youtrack.jetbrains.com/issue/KT-59251) KMP/JS: forbid matching actual callable with dynamic return type to expect callable with non-dynamic return type
- [`KT-61510`](https://youtrack.jetbrains.com/issue/KT-61510) K2: internal declarations are invisible in cyclically dependent modules

            .renderAll("packages") { prettyRenderPackage(it) }
        scope.getClassifierSymbols().toList().renderAll("classifiers") { prettyRenderDeclaration(it) }
        scope.getCallableSymbols().toList().renderAll("callables") { prettyRenderDeclaration(it) }
        scope.getConstructors().toList().renderAll("constructors") { prettyRenderDeclaration(it) }
    }

    private fun prettyRenderPackage(symbol: KaPackageSymbol): String =