# 表单数据

接收的不是 JSON，而是表单字段时，要使用 `Form`。

/// info | 说明

要使用表单，需预先安装 <a href="https://github.com/Kludex/python-multipart" class="external-link" target="_blank">`python-multipart`</a>。

例如，`pip install python-multipart`。

///

## 导入 `Form`

从 `fastapi` 导入 `Form`：

{* ../../docs_src/request_forms/tutorial001.py hl[1] *}

## 定义 `Form` 参数

创建表单（`Form`）参数的方式与 `Body` 和 `Query` 一样：

import me.champeau.gradle.japicmp.report.RichReport
import org.gradle.api.Action
import org.gradle.api.Project
import org.gradle.api.file.Directory
import org.gradle.api.file.FileCollection

class BinaryCompatibilityHelper {
    static setupJApiCmpRichReportRules(
        JapicmpTask japicmpTask,
        Project project,
        Directory acceptedViolationsDir,
        FileCollection sourceRoots,

          .put(NullPointerException.class, e -> e instanceof NullPointerException)
          .put(NumberFormatException.class, e -> e instanceof NumberFormatException)
          .put(RuntimeException.class, e -> e instanceof RuntimeException)
          .put(TimeoutException.class, e -> e instanceof TimeoutException)

    assertTrue(runnableFuture2.isDone());
    assertTrue(runnable2.run);
    assertEquals((Integer) 3, runnableFuture2.get());
  }

  private static class TestRunnable implements Runnable {
    boolean run = false;

    @Override
    public void run() {
      run = true;
    }
  }

  private static class TestCallable implements Callable<String> {
    @Override

import static org.junit.jupiter.api.Assertions.assertTrue;

class DefaultMavenTest extends AbstractCoreMavenComponentTestCase {
    @Singleton
    @Named("WsrClassCatcher")
    private static final class WsrClassCatcher extends AbstractMavenLifecycleParticipant {
        private final AtomicReference<Class<?>> wsrClassRef = new AtomicReference<>(null);

        @Override

    extends Map<Class<? extends @NonNull B>, B> {
  /**
   * Returns the value the specified class is mapped to, or {@code null} if no entry for this class
   * is present. This will only return a value that was bound to this specific class, not a value
   * that may have been bound to a subtype.
   */
  <T extends @NonNull B> @Nullable T getInstance(Class<T> type);

  /**

  //                 suite.addTest((TestSuite) suiteOrClass);
  //             else if (suiteOrClass instanceof Class)
  //                 suite.addTest(new TestSuite((Class<?>) suiteOrClass));
  //             else
  //                 throw new ClassCastException("not a test suite or class");
  //         }
  //         return suite;
  //     }

  //     /**

You might notice that to create an instance of a Python class, you use that same syntax.

For example:

```Python
class Cat:
    def __init__(self, name: str):
        self.name = name


fluffy = Cat(name="Mr Fluffy")
```

In this case, `fluffy` is an instance of the class `Cat`.

And to create `fluffy`, you are "calling" `Cat`.

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

                new ComponentDescriptor<>(InjectDependencyLifecycleListener.class, container.getContainerRealm());
        cd.setRoleClass(AbstractMavenLifecycleParticipant.class);
        container.addComponentDescriptor(cd);

        Maven maven = container.lookup(Maven.class);
        File pom = getProject("lifecycle-listener-dependency-injection");

  }

  public void testExecutors_nullCheck() throws Exception {
    new ClassSanityTester()
        .setDefault(RateLimiter.class, RateLimiter.create(1.0))
        .forAllPublicStaticMethods(MoreExecutors.class)
        .thatReturn(Executor.class)
        .testNulls();
  }

  private static class TestApplication extends Application {
    private final List<Thread> hooks = new ArrayList<>();

    @Override