{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[21:22] hl[21:22] *}

### Crear una Dependencia de Session { #create-a-session-dependency }

Una **`Session`** es lo que almacena los **objetos en memoria** y lleva un seguimiento de cualquier cambio necesario en los datos, luego **usa el `engine`** para comunicarse con la base de datos.

    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>${junit.version}</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.mockito</groupId>
      <artifactId>mockito-core</artifactId>
      <version>${mockito.version}</version>
      <scope>test</scope>
    </dependency>
    <dependency>

        Artifact dependencyArtifact = factory.createDependencyArtifact(
                dependency.getGroupId(),
                dependency.getArtifactId(),
                versionRange,
                dependency.getType(),
                dependency.getClassifier(),
                effectiveScope,
                dependency.isOptional());

    </dependency>
    <dependency>
      <groupId>com.google.j2objc</groupId>
      <artifactId>j2objc-annotations</artifactId>
    </dependency>
    <dependency>
      <groupId>${project.groupId}</groupId>
      <artifactId>guava</artifactId>
      <version>${project.version}</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>

    </dependency>
    <dependency>
      <groupId>com.google.j2objc</groupId>
      <artifactId>j2objc-annotations</artifactId>
    </dependency>
    <dependency>
      <groupId>${project.groupId}</groupId>
      <artifactId>guava</artifactId>
      <version>${project.version}</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>

    * Required scopes `["items"]` with the dependency:
    * `get_current_active_user`:
        *  The dependency function `get_current_active_user` has:
            * Required scopes `["me"]` with the dependency:
            * `get_current_user`:
                * The dependency function `get_current_user` has:
                    * No scopes required by itself.
                    * A dependency using `oauth2_scheme`.

    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-artifact</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-builder-support</artifactId>
    </dependency>
    <dependency>
      <groupId>org.codehaus.plexus</groupId>
      <artifactId>plexus-interpolation</artifactId>
    </dependency>
    <dependency>

        }

        private void visit(Dependency dependency) {
            if (dependency != null) {
                String org, val;
                // GroupId
                org = dependency.getGroupId();
                val = interpolate(org);
                if (org != val) {
                    dependency.setGroupId(val);
                    dependency.clearManagementKey();
                }

    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-model</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-xml</artifactId>
    </dependency>

    <!-- Maven4 impl -->
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-core</artifactId>
    </dependency>
    <dependency>

      <type>jar</type>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>snapshot-test</groupId>
      <artifactId>maven-snapshot-c</artifactId>
      <version>1.0-SNAPSHOT</version>
      <type>jar</type>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>snapshot-test</groupId>
      <artifactId>maven-snapshot-d</artifactId>
      <version>1.0-SNAPSHOT</version>