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## What makes a dependency { #what-makes-a-dependency }

Up to now you have seen dependencies declared as functions.

But that's not the only way to declare dependencies (although it would probably be the more common).

The key factor is that a dependency should be a "callable".

A "**callable**" in Python is anything that Python can "call" like a function.

  <name>Simple Unit Test Artifact</name>

  <dependencies>
    <dependency>
      <groupId>ut.simple</groupId>
      <artifactId>dependency</artifactId>
    </dependency>
    <dependency>
      <groupId>ut.simple</groupId>
      <artifactId>dependency</artifactId>
      <version>1.0</version>
      <classifier>sources</classifier>
    </dependency>
  </dependencies>

     * <li>one SPDX identifier if the LICENSE content matches with an SPDX license.</li>
     * <li>Custom;URL if it's not an SPDX license,
     * URL is the Github URL to the LICENSE file in elasticsearch repository.</li>
     * </ul>
     *
     * @param group dependency group
     * @param name  dependency name

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>maven-test</groupId>
        <artifactId>t05-a</artifactId>
        <version>1.0</version>
      </dependency>
      <dependency>
        <groupId>maven-test</groupId>
        <artifactId>t05-b</artifactId>
        <version>1.1</version>
      </dependency>
      <dependency>
        <groupId>maven-test</groupId>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>maven-test</groupId>
        <artifactId>t07-a</artifactId>
        <version>1.0</version>
      </dependency>
      <dependency>
        <groupId>maven-test</groupId>
        <artifactId>t07-b</artifactId>
        <version>1.1</version>
      </dependency>
      <dependency>
        <groupId>maven-test</groupId>

## Instance'ı dependency olarak kullanma { #use-the-instance-as-a-dependency }

Sonra `Depends(FixedContentQueryChecker)` yerine `Depends(checker)` içinde bu `checker`'ı kullanabiliriz. Çünkü dependency, class'ın kendisi değil, `checker` instance'ıdır.

Ve dependency çözülürken **FastAPI** bu `checker`'ı şöyle çağırır:

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

        Set<File> shaFiles = parentTask.get().getShaFiles();

        for (File dependency : parentTask.get().getDependencies()) {
            String jarName = dependency.getName();
            File shaFile = parentTask.get().getShaFile(jarName);

            if (shaFile.exists() == false) {
                createSha(dependency, jarName, shaFile);
            } else {
                shaFiles.remove(shaFile);
            }

{* ../../docs_src/security/tutorial005_an_py310.py hl[130:136] *}

## Dependency ağacı ve scope'lar { #dependency-tree-and-scopes }

Bu dependency ağacını ve scope'ları tekrar gözden geçirelim.

            Map<String, Dependency> dependencies = new LinkedHashMap<>();

            DependencyManagement depMgmt = target.getDependencyManagement();

            if (depMgmt != null) {
                for (Dependency dependency : depMgmt.getDependencies()) {
                    dependencies.put(dependency.getManagementKey(), dependency);
                }
            } else {

    private DependencyCoordinates toDependency(org.apache.maven.api.model.Dependency dependency) {
        return new DependencyCoordinates() {
            @Override
            public String getGroupId() {
                return dependency.getGroupId();
            }

            @Override
            public String getArtifactId() {
                return dependency.getArtifactId();
            }

            @Override