// Make sure it returned a copy
    list.set(0, (double) 4);
    assertThat(newArray).isEqualTo(new double[] {(double) 0, (double) 1, (double) 2});
    newArray[1] = (double) 5;
    assertThat((double) list.get(1)).isEqualTo((double) 1);
  }

  // This test stems from a real bug found by andrewk
  public void testAsList_subList_toArray_roundTrip() {
    double[] array = {(double) 0, (double) 1, (double) 2, (double) 3};

    // Make sure it returned a copy
    list.set(0, (float) 4);
    assertThat(newArray).isEqualTo(new float[] {(float) 0, (float) 1, (float) 2});
    newArray[1] = (float) 5;
    assertThat((float) list.get(1)).isEqualTo((float) 1);
  }

  // This test stems from a real bug found by andrewk
  public void testAsList_subList_toArray_roundTrip() {
    float[] array = {(float) 0, (float) 1, (float) 2, (float) 3};

    // Make sure it returned a copy
    list.set(0, (long) 4);
    assertThat(newArray).isEqualTo(new long[] {(long) 0, (long) 1, (long) 2});
    newArray[1] = (long) 5;
    assertThat((long) list.get(1)).isEqualTo((long) 1);
  }

  // This test stems from a real bug found by andrewk
  public void testAsList_subList_toArray_roundTrip() {
    long[] array = {(long) 0, (long) 1, (long) 2, (long) 3};

```

...& ↩️ 👥 ⚙️:

```Python
user = db.query(User).first()
```

⤴️ 👥 🔜 📣 *➡ 🛠️ 🔢* & 🔗 🍵 `async def`, ⏮️ 😐 `def`,:

```Python hl_lines="2"
@app.get("/users/{user_id}", response_model=schemas.User)
def read_user(user_id: int, db: Session = Depends(get_db)):
    db_user = crud.get_user(db, user_id=user_id)
    ...
```

/// info

* 빈 파일 `__init__.py`을 생성합니다.
* 다음과 같은 `main.py`을 생성합니다:

```Python
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

### 도커파일

		if len(tag) != 0 {
			allEmpty = false
			break
		}
	}
	if allEmpty {
		c.PartETags = nil
	}
	if len(c.PartActualSizes) == 0 {
		c.PartActualSizes = nil
	}

	// Get a 64 bit CRC
	crc := hashDeterministicString(c.MetaUser)
	crc ^= hashDeterministicBytes(c.MetaSys)

	// Nil fields.
	c.MetaSys = nil
	c.MetaUser = nil

  }

  @CanIgnoreReturnValue
  @Override
  @CheckForNull
  public E poll() {
    return isEmpty() ? null : removeAndGet(0);
  }

  @SuppressWarnings("unchecked") // we must carefully only allow Es to get in
  E elementData(int index) {
    /*
     * requireNonNull is safe as long as we're careful to call this method only with populated
     * indexes.
     */
    return (E) requireNonNull(queue[index]);
  }

<div class="termy">

```console
$ which pip

some/directory/fastapi/env/bin/pip
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
$ Get-Command pip

some/directory/fastapi/env/bin/pip
```

</div>

////

`env/bin/pip`に`pip`バイナリが表示される場合は、正常に機能しています。🎉


/// tip | "豆知識"

この環境で`pip`を使って新しいパッケージをインストールするたびに、仮想環境を再度有効化します。

# Do NOT depend on it.
tf_native_cc_binary(
    name = "tf_custom_op_library_additional_deps.dll",
    linkshared = 1,
    linkstatic = 1,
    deps = tf_custom_op_library_additional_deps_impl(),
)

# Get a DEF file generated by parsing all object files
# of tf_custom_op_library_additional_deps.so
filegroup(
    name = "tensorflow_def_file",
    srcs = [":tf_custom_op_library_additional_deps.dll"],

```Python hl_lines="5-10  16  21" title="app/routers/items.py"
{!../../docs_src/bigger_applications/app/routers/items.py!}
```

由于每个*路径操作*的路径都必须以 `/` 开头，例如：

```Python hl_lines="1"
@router.get("/{item_id}")
async def read_item(item_id: str):
    ...
```

...前缀不能以 `/` 作为结尾。

因此，本例中的前缀为 `/items`。

我们还可以添加一个 `tags` 列表和额外的 `responses` 列表，这些参数将应用于此路由器中包含的所有*路径操作*。