但如果你知道在从 *路径操作函数* 返回之后不再需要使用该依赖，你可以使用 `Depends(scope="function")` 告诉 FastAPI：应当在 *路径操作函数* 返回后、但在**响应发送之前**关闭该依赖。

{* ../../docs_src/dependencies/tutorial008e_an_py310.py hl[12,16] *}

`Depends()` 接收一个 `scope` 参数，可为：

* `"function"`：在处理请求的 *路径操作函数* 之前启动依赖，在 *路径操作函数* 结束后结束依赖，但在响应发送给客户端**之前**。因此，依赖函数将围绕这个*路径操作函数*执行。
* `"request"`：在处理请求的 *路径操作函数* 之前启动依赖（与使用 `"function"` 时类似），但在响应发送给客户端**之后**结束。因此，依赖函数将围绕这个**请求**与响应周期执行。

import com.google.common.annotations.GwtCompatible;
import com.google.common.base.Function;
import com.google.common.base.Functions;
import java.util.HashMap;
import java.util.Map;
import org.jspecify.annotations.NullMarked;

/**
 * Tests for {@link Maps#transformValues(Map, Function)}.
 *
 * @author Isaac Shum
 */
@GwtCompatible
@NullMarked

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.sso;

import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;

import org.codelibs.fess.app.web.base.login.FessLoginAssist;
import org.codelibs.fess.entity.FessUser;
import org.codelibs.fess.mylasta.action.FessUserBean;
import org.codelibs.fess.unit.UnitFessTestCase;

Let's imagine you want to get the client's IP address/host inside of your *path operation function*.

For that you need to access the request directly.

{* ../../docs_src/using_request_directly/tutorial001_py310.py hl[1,7:8] *}

By declaring a *path operation function* parameter with the type being the `Request` **FastAPI** will know to pass the `Request` in that parameter.

/// tip

import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;
import java.util.Spliterator;
import java.util.Spliterators;
import java.util.function.BiFunction;
import java.util.function.BinaryOperator;
import java.util.function.Function;
import java.util.stream.Collector;
import java.util.stream.Collectors;
import org.jspecify.annotations.Nullable;

/**

  }

  /**
   * Computes the function of current and new value. Subclasses should open-code this update
   * function for most uses, but the virtualized form is needed within retryUpdate.
   *
   * @param currentValue the current value (of either base or a cell)
   * @param newValue the argument from a user update call
   * @return result of the update function
   */
  abstract long fn(long currentValue, long newValue);

        override fun contentLength(): Long = contentLength

        override fun source(): BufferedSource = this@asResponseBody
      }

    @JvmStatic
    @Deprecated(
      message = "Moved to extension function. Put the 'content' argument first to fix Java",
      replaceWith =
        ReplaceWith(
          expression = "content.toResponseBody(contentType)",
          imports = ["okhttp3.ResponseBody.Companion.toResponseBody"],

type currentPathTracker struct {
	name *unsafe.Pointer // contains atomically accessed *string
}

// currentPathUpdater provides a lightweight update function for keeping track of
// current objects for each disk.
// Returns a function that can be used to update the current object
// and a function to call to when processing finished.
func (p *scannerMetrics) currentPathUpdater(disk, initial string) (update func(path string), done func()) {

	var _C_zero *C.mpz_t

and then replacing all instances of C.zero with (*_C_zero).

Cgo's most interesting translation is for functions.  If xxx is a C
function, then cgo rewrites C.xxx into a new function _C_xxx that
calls the C xxx in a standard pthread.  The new function translates
its arguments, calls xxx, and translates the return value.

Translation of parameters and the return value follows the type

package com.google.common.collect;

import com.google.common.annotations.GwtCompatible;
import com.google.common.base.Function;
import java.util.ListIterator;
import org.jspecify.annotations.Nullable;

/**
 * An iterator that transforms a backing list iterator; for internal use. This avoids the object
 * overhead of constructing a {@link Function} for internal methods.
 *
 * @author Louis Wasserman
 */
@GwtCompatible