```Python
from starlette.exceptions import HTTPException as StarletteHTTPException
```

### Réutiliser les gestionnaires d'exception de **FastAPI** { #reuse-fastapis-exception-handlers }

CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE....

{ return nil, nil, errors.New("extendedGCD: both a and m are even") } size := max(len(a.limbs), len(m.limbs)) u = NewNat().set(a).expand(size) v := NewNat().set(m).expand(size) A = NewNat().reset(len(m.limbs)) A.limbs[0] = 1 B := NewNat().reset(len(a.limbs)) C := NewNat().reset(len(m.limbs)) D := NewNat().reset(len(a.limbs)) D.limbs[0] = 1 // Before and after each loop iteration, the following hold: // // u = A*a - B*m // v = D*m - C*a // 0 < u <= a // 0 <= v <= m // 0 <= A < m // 0 <= B <= a // 0...

                for (Throwable cause = e.getCause();
                        cause != null && cause != cause.getCause();
                        cause = cause.getCause()) {
                    logger.error("Caused by: {}", cause.getMessage());
                }
            }
        }
    }

    public static String formatTimestamp(TemporalAccessor instant) {

and costs (collectively "Losses") arising from claims, lawsuits and other
legal actions brought by a third party against the Indemnified Contributor
to the extent caused by the acts or omissions of such Commercial Contributor
in connection with its distribution of the Program in a commercial product
offering. The obligations in this section do not apply to any claims or Losses

            assertTrue(result.contains("Outer exception"));
            // The nested exceptions will appear in the stack trace
            assertTrue(result.contains("Caused by"));
        }

        @Test
        @DisplayName("Should handle exception with empty message")
        void testToStringWithEmptyMessage() {
            TransportException exception = new TransportException("");

      return Maps.keyIterator(entrySet().iterator());
    }
  }

  @LazyInit private transient @Nullable Set<V> valueSet;

  @Override
  public Set<V> values() {
    /*
     * We can almost reuse the inverse's keySet, except we have to fix the
     * iteration order so that it is consistent with the forward map.
     */
    Set<V> result = valueSet;
    return (result == null) ? valueSet = new ValueSet() : result;

本例中，为了在同一份代码中同时使用两个 `HTTPException`，将 Starlette 的异常重命名为 `StarletteHTTPException`：

```Python
from starlette.exceptions import HTTPException as StarletteHTTPException
```

### 复用 **FastAPI** 的异常处理器 { #reuse-fastapis-exception-handlers }

如果你想在自定义处理后仍复用 **FastAPI** 的默认异常处理器，可以从 `fastapi.exception_handlers` 导入并复用这些默认处理器：

{* ../../docs_src/handling_errors/tutorial006_py310.py hl[2:5,15,21] *}

				// Reading first time on this disk, hence the buffer needs to be allocated.
				// Subsequent reads will reuse this buffer.
				p.buf[bufIdx] = make([]byte, p.shardSize)
			}
			// For the last shard, the shardsize might be less than previous shard sizes.
			// Hence the following statement ensures that the buffer size is reset to the right size.
			p.buf[bufIdx] = p.buf[bufIdx][:p.shardSize]
			n, err := rr.ReadAt(p.buf[bufIdx], p.offset)

     * @param errorName the name/type of the error that occurred
     * @param url the URL that failed to be crawled
     * @param e the exception that caused the failure
     * @return the stored or updated FailureUrl entity, or null if the exception should be ignored
     */