when:
        resolveLocalPath()
        run ':m1:checkDeps'

        then:
        expectResolvedToLocal(resolveLocal)

        when:
        resolvePublishedPath()
        run ':m1:checkDeps'

        then:
        expectResolveToPublished(resolvePublished)
    }

```Python hl_lines="16"
{!../../../docs_src/dependencies/tutorial011.py!}
```

这样就可以**参数化**依赖项，它包含 `checker.fixed_content` 的属性 - `"bar"`。

## 把实例作为依赖项

然后，不要再在 `Depends(checker)` 中使用 `Depends(FixedContentQueryChecker)`， 而是要使用 `checker`，因为依赖项是类实例 - `checker`，不是类。

处理依赖项时，**FastAPI** 以如下方式调用 `checker`：

```Python
checker(q="somequery")
```

……并用*路径操作函数*的参数 `fixed_content_included` 返回依赖项的值：

```Python hl_lines="20"

## Use the instance as a dependency

Then, we could use this `checker` in a `Depends(checker)`, instead of `Depends(FixedContentQueryChecker)`, because the dependency is the instance, `checker`, not the class itself.

And when solving the dependency, **FastAPI** will call this `checker` like:

```Python
checker(q="somequery")
```

			return errors.NewBadRequest(bodyText)
		case resp.StatusCode == http.StatusNotFound:
			return errors.NewGenericServerResponse(resp.StatusCode, "", checker.QualifiedResource, checker.Name, bodyText, 0, false)
		}
		return errors.NewGenericServerResponse(resp.StatusCode, "", checker.QualifiedResource, checker.Name, bodyText, 0, false)
	}
	return nil
}

        expect:
        // have to run twice to trigger the failure, to parse the descriptor from the cache
        succeeds ":checkDeps"
        resolve.expectGraph {
            root(":", ":test:") {
                module("group:artifact:1.0")
            }
        }

        succeeds ":checkDeps"
        resolve.expectGraph {
            root(":", ":test:") {
                module("group:artifact:1.0")
            }

    lockedConf('org:foo') {
        version { strictly '1.1' }
    }
}
"""

        lockfileFixture.createLockfile('lockedConf',['org:foo:1.0'], unique)

        when:
        fails 'checkDeps'

        then:
        failure.assertHasCause """Cannot find a version of 'org:foo' that satisfies the version constraints:
   Dependency path ':depLock:unspecified' --> 'org:foo:1.+'

		t.Fatalf("typechecking runtime failed: %v", err)
	}

	// Analyze all atomic.*64 callsites.
	v := Visitor{t: t, fset: fset, types: info.Types, checked: checked}
	ast.Walk(&v, pkg)
}

type Visitor struct {
	fset    *token.FileSet
	types   map[ast.Expr]types.TypeAndValue
	checked map[string]bool
	t       *testing.T
}

func (v *Visitor) Visit(n ast.Node) ast.Visitor {
	c, ok := n.(*ast.CallExpr)
	if !ok {

          "version": {
            "requires": "${jsr305.version}"
          }
        },
        {
          "group": "org.checkerframework",
          "module": "checker-qual",
          "version": {
            "requires": "${checker.version}"
          }
        },
        {
          "group": "com.google.errorprone",
          "module": "error_prone_annotations",
          "version": {

          <item index="10" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableDecl" />
          <item index="11" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableType" />
          <item index="12" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.qual.Nullable" />

                }
            }
            configurations.conf.resolutionStrategy {
                force 'org:foo:1.0'
            }
        """

        when:
        run 'checkDeps'

        then:
        resolve.expectGraph {
            root(":", ":test:") {
                constraint("org:foo:1.1","org:foo:1.0")
                module("org:bar:1.0") {