# Tutorial - User Guide { #tutorial-user-guide }

This tutorial shows you how to use **FastAPI** with most of its features, step by step.

Each section gradually builds on the previous ones, but it's structured to separate topics, so that you can go directly to any specific one to solve your specific API needs.

It is also built to work as a future reference so you can come back and see exactly what you need.

## Run the code { #run-the-code }

///

## Automatic conversion { #automatic-conversion }

`Header` has a little extra functionality on top of what `Path`, `Query` and `Cookie` provide.

Most of the standard headers are separated by a "hyphen" character, also known as the "minus symbol" (`-`).

But a variable like `user-agent` is invalid in Python.

        buf.append(Integer.toHexString(i >> 16 & 0xff));
        buf.append(Integer.toHexString(i >> 8 & 0xff));
        buf.append(Integer.toHexString(i & 0xff));
    }

    /**
     * Converts an underscore-separated string to camel case.
     * <p>
     * Usage example:
     * </p>
     *
     * <pre>
     * StringUtil.camelize("USER_ID")  = "UserId"
     * </pre>
     *
     * @param s

   */
  // TODO(user): Evaluate whether it makes sense to always piggyback the computation of a
  // HashCode on an existing OutputStream, compared to creating a separate OutputStream that could
  // be (optionally) be combined with another if needed (with something like
  // MultiplexingOutputStream).
  public HashingOutputStream(HashFunction hashFunction, OutputStream out) {

  responseTypes: [ "code", "token", "id_token" ] # also allowed are "token" and "id_token"
  # By default, Dex will ask for approval to share data with application
  # (approval for sharing data from connected IdP to Dex is separate process on IdP)
  skipApprovalScreen: false
  # If only one authentication method is enabled, the default behavior is to
  # go directly to it. For connected IdPs, this redirects the browser away

		bits = (bits &^ 0xf) | arm.C_SCOND_NONE
	}
	prog.Scond = bits
	return true
}

// ParseARMCondition parses the conditions attached to an ARM instruction.
// The input is a single string consisting of period-separated condition
// codes, such as ".P.W". An initial period is ignored.
func ParseARMCondition(cond string) (uint8, bool) {
	return parseARMCondition(cond, armLS, armSCOND)
}

```

If provided, the auth token parameter is sent as an authorization header.

`MINIO_IDENTITY_PLUGIN_ROLE_POLICY` is a required parameter and can be list of comma separated policy names.

 *
 * This class implements the TRANS_TRANSACT_NAMED_PIPE transaction which
 * combines writing data to a pipe and reading the response in a single operation.
 * This is more efficient than separate write and read operations.
 */
public class TransTransactNamedPipe extends SmbComTransaction {

    private static final Logger log = LoggerFactory.getLogger(TransTransactNamedPipe.class);

	// Bucket metrics are special, they always include the bucket label. These
	// metrics required a list of buckets to be passed to the loader, and the list
	// of buckets is not known until the request is made. So we keep a separate
	// map for bucket metrics and handle them specially.

	// Add the serverName and poolIndex labels to all non-cluster metrics.
	//
	// Also create metric group maps and set the cache.

        }
        return OptionalThing.empty();
    }

    /**
     * Configuration class that holds parsed configuration values for a field.
     * This class parses pipe-separated configuration values and provides methods
     * to check for specific configuration options.
     */
    public static class Config {

        /**