static final int FLAGS_COPY_SOURCE_MODE_ASCII      = 0x0008;
    static final int FLAGS_VERIFY_ALL_WRITES           = 0x0010; 
    static final int FLAGS_TREE_COPY                   = 0x0020; 

    // open function
    static final int OPEN_FUNCTION_FAIL_IF_EXISTS      = 0x0000;
    static final int OPEN_FUNCTION_OVERWRITE_IF_EXISTS = 0x0020;

    static final int PID = (int)( Math.random() * 65536d );

import com.google.caliper.BeforeExperiment;
import com.google.caliper.Benchmark;
import com.google.caliper.Param;

/**
 * Benchmarks against the Apache Commons Math utilities.
 *
 * <p>Note: the Apache benchmarks are not open sourced to avoid the extra dependency.
 *
 * @author Louis Wasserman
 */
public class ApacheBenchmark {
  private enum Impl {
    GUAVA {
      @Override
      public double factorialDouble(int n) {

```Python
with open("./somefile.txt") as f:
    contents = f.read()
    print(contents)
```

Por baixo dos panos, o código `open("./somefile.txt")` cria um objeto que é chamado de "Gerenciador de Contexto".

 * are "allowed". If all of the desired access bits are not "allowed"
 * the then same process is repeated for inherited ACEs.
 * <p>
 * For example, if user <tt>WNET\alice</tt> tries to open a file
 * with desired access bits <tt>0x00000003</tt> (<tt>FILE_READ_DATA |
 * FILE_WRITE_DATA</tt>) and the target file has the following security
 * descriptor ACEs:
 * 
 * <pre>

	return bytesBuffer.Bytes()
}

// Write parts count
func setPartsCountHeaders(w http.ResponseWriter, objInfo ObjectInfo) {
	if strings.Contains(objInfo.ETag, "-") && len(objInfo.Parts) > 0 {
		w.Header()[xhttp.AmzMpPartsCount] = []string{strconv.Itoa(len(objInfo.Parts))}
	}
}

// Write object header

	if args.QueueDir != "" {
		queueDir := filepath.Join(args.QueueDir, storePrefix+"-nsq-"+id)
		queueStore = store.NewQueueStore[event.Event](queueDir, args.QueueLimit, event.StoreExtension)
		if err := queueStore.Open(); err != nil {
			return nil, fmt.Errorf("unable to initialize the queue store of NSQ `%s`: %w", id, err)
		}
	}

	target := &NSQTarget{
		id:         event.TargetID{ID: id, Name: "nsq"},
		args:       args,

* **Robust**: Get production-ready code. With automatic interactive documentation.

    <root-XML localName="map" namespaceURI="http://docs.oasis-open.org/namespace"/>
    <glob pattern="*.ditamap"/>
  </mime-type>
  <mime-type type="application/dita+xml;format=topic">
    <sub-class-of type="application/dita+xml"/>
    <_comment>DITA Topic</_comment>
    <root-XML localName="topic"/>
    <root-XML localName="topic" namespaceURI="http://docs.oasis-open.org/namespace"/>

}

func getMountMap() (map[string]string, error) {
	result := make(map[string]string)

	mountInfo, err := os.Open("/proc/self/mountinfo")
	if err != nil {
		return nil, err
	}
	defer mountInfo.Close()

	scanner := bufio.NewScanner(mountInfo)
	for scanner.Scan() {
		s := strings.Split(scanner.Text(), " ")
		if len(s) != 11 {
			return nil, errors.New("unsupported /proc/self/mountinfo format")
		}
		result[s[2]] = s[9]
	}

```Python hl_lines="6-7"
{!../../docs_src/query_params/tutorial005.py!}
```

Here the query parameter `needy` is a required query parameter of type `str`.

If you open in your browser a URL like:

```
http://127.0.0.1:8000/items/foo-item
```

...without adding the required parameter `needy`, you will see an error like:

```JSON
{
  "detail": [
    {