[registry.k8s.io/kube-controller-manager:v1.24.17](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager) | [amd64](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager-amd64), [arm](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager-arm), [arm64](https://console.cloud.google.com/gcr/images/k8s-artifacts-prod/us/kube-controller-manager-arm64),...

  virtual bool UsesTFRT() = 0;

  // List attributes of available devices
  virtual void ListDevices(std::vector<DeviceAttributes>* devices) = 0;

  // Add `devices` into context's device manager. Context's device manager
  // will take ownership and maintain devices' lifetime.
  virtual Status AddDevices(std::vector<std::unique_ptr<Device>> devices) = 0;

  // Block until all pending nodes are finished.

Underneath, the `open("./somefile.txt")` creates an object that is called a "Context Manager".

When the `with` block finishes, it makes sure to close the file, even if there were exceptions.

When you create a dependency with `yield`, **FastAPI** will internally create a context manager for it, and combine it with some other related tools.

### Using context managers in dependencies with `yield`

!!! warning

[registry.k8s.io/kube-controller-manager:v1.29.4](https://console.cloud.google.com/artifacts/docker/k8s-artifacts-prod/southamerica-east1/images/kube-controller-manager) | [amd64](https://console.cloud.google.com/artifacts/docker/k8s-artifacts-prod/southamerica-east1/images/kube-controller-manager-amd64), [arm64](https://console.cloud.google.com/artifacts/docker/k8s-artifacts-prod/southamerica-east1/images/kube-controller-manager-arm64), [ppc64le](https://console.cloud.google.co...

	}
}

func getTLSConfig() (x509Certs []*x509.Certificate, manager *certs.Manager, secureConn bool, err error) {
	if !(isFile(getPublicCertFile()) && isFile(getPrivateKeyFile())) {
		return nil, nil, false, nil
	}

	if x509Certs, err = config.ParsePublicCertFile(getPublicCertFile()); err != nil {
		return nil, nil, false, err
	}

       }
      },
      "filter_chains": [
       {
        "filters": [
         {
          "name": "envoy.filters.network.http_connection_manager",
          "typed_config": {
           "@type": "type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager",
           "stat_prefix": "stats",
           "route_config": {
            "virtual_hosts": [
             {

 * under the License.
 */
package org.apache.maven.api.services;

import org.apache.maven.api.ProjectScope;
import org.apache.maven.api.annotations.Experimental;

/**
 * Manager for {@link ProjectScope}.
 *
 * @since 4.0.0
 */
@Experimental

import org.eclipse.aether.internal.impl.scope.ScopeManagerImpl;
import org.eclipse.aether.resolution.ArtifactDescriptorPolicy;
import org.eclipse.aether.util.artifact.DefaultArtifactTypeRegistry;
import org.eclipse.aether.util.graph.manager.ClassicDependencyManager;
import org.eclipse.aether.util.graph.selector.AndDependencySelector;
import org.eclipse.aether.util.graph.selector.ExclusionDependencySelector;

So, in this case, you **would not** want to have a process manager like Gunicorn with Uvicorn workers, or Uvicorn using its own Uvicorn workers. You would want to have just a **single Uvicorn process** per container (but probably multiple containers).

    }

    @Override
    protected DictionaryFile<? extends DictionaryItem> newDictionaryFile(final String id, final String path, final Date timestamp) {
        return new StopwordsFile(id, path, timestamp).manager(dictionaryManager);
    }