The exception handler will receive a `Request` and the exception.

```Python hl_lines="2  14-16"
{!../../docs_src/handling_errors/tutorial004.py!}
```

Now, if you go to `/items/foo`, instead of getting the default JSON error with:

```JSON
{
    "detail": [
        {
            "loc": [
                "path",
                "item_id"
            ],

    response = client.post(
        "/admin/?token=jessica", headers={"X-Token": "fake-super-secret-token"}
    )
    assert response.status_code == 200, response.text
    assert response.json() == {"message": "Admin getting schwifty"}


def test_admin_invalid_header(client: TestClient):
    response = client.post("/admin/", headers={"X-Token": "invalid"})
    assert response.status_code == 400, response.text

  /**
   * Views the array as an immutable list. The array must have only {@code E} elements.
   *
   * <p>The array must be internally created.
   */
  @SuppressWarnings("unchecked") // caller is reponsible for getting this right
  static <E> ImmutableList<E> asImmutableList(Object[] elements) {
    return unsafeDelegateList((List) Arrays.asList(elements));
  }

        return new SID(this,
                    SID_TYPE_DOMAIN,
                    this.domainName,
                    null,
                    getType() != SID_TYPE_DOMAIN);
    }
    public int getRid() {
        if (getType() == SID_TYPE_DOMAIN)
            throw new IllegalArgumentException("This SID is a domain sid");
        return sub_authority[sub_authority_count - 1];
    }

    /**

## Враження

"_[...] I'm using **FastAPI** a ton these days. [...] I'm actually planning to use it for all of my team's **ML services at Microsoft**. Some of them are getting integrated into the core **Windows** product and some **Office** products._"

            + (throwable == null ? null : Throwables.getStackTraceAsString(throwable)),
        throwableFromOtherThread.get());
  }

  /**
   * Test for a bug where threads weren't getting signaled when shutdown was called, only when tasks
   * completed.
   */
  public void testDirectExecutorService_awaitTermination_missedSignal() {
    final ExecutorService service = newDirectExecutorService();

   * requests become more likely to trigger expensive operations (a more extreme case of this
   * example is when a server has just booted, and it is mostly busy with getting itself up to
   * speed).
   *
   * To deal with such scenarios, we add an extra dimension, that of "past underutilization",
   * modeled by "storedPermits" variable. This variable is zero when there is no underutilization,

// already-finalized operation.
//
// Note that TFE_OpGetFlatInputCount and TFE_OpGetFlatInput operate on a flat
// sequence of inputs, unlike TFE_OpGetInputLength (for getting the length of a
// particular named input list, which may only be part of the op's inputs).
TF_CAPI_EXPORT extern int TFE_OpGetFlatInputCount(const TFE_Op* op,
                                                  TF_Status* status);

                else if ( dh.hasCapability(SmbConstants.CAP_NT_SMBS) ) {
                    // use the open file descriptor
                    dh.send(
                        new Trans2SetFileInformation(dh.getConfig(), dfd.getFid(), attrs, ctime, mtime, atime),
                        new Trans2SetFileInformationResponse(dh.getConfig()));
                }
                else {
                    dh.send(

                        off += n;
                        len -= n;
                        continue;
                    }

                    SmbComReadAndX request = new SmbComReadAndX(th.getConfig(), fd.getFid(), this.fp, r, null);
                    if ( type == SmbConstants.TYPE_NAMED_PIPE ) {
                        request.setMinCount(1024);
                        request.setMaxCount(1024);