* PostgreSQL
* MySQL
* SQLite
* Oracle
* Microsoft SQL Server, etc.

Dans cet exemple, nous utiliserons **SQLite**, car il utilise un seul fichier et Python a un support intégré. Ainsi, vous pouvez copier cet exemple et l'exécuter tel quel.

Plus tard, pour votre application de production, vous voudrez peut-être utiliser un serveur de base de données comme **PostgreSQL**.

/// tip | Astuce

{* ../../docs_src/query_params_str_validations/tutorial015_an_py310.py hl[5,16:19,24] *}

/// info | Info

Dies ist verfügbar seit Pydantic Version 2 oder höher. 😎

///

/// tip | Tipp

search_engine.password=
# Interval (ms) for heartbeat checks to the search engine.
search_engine.heartbeat_interval=10000

# Cipher algorithm used for encryption.
app.cipher.algorithm=aes
# Secret key for encryption (change this value for production).
app.cipher.key=___change__me___
# Algorithm for digest calculation.
app.digest.algorithm=sha256
# Regex pattern for properties to encrypt.

      }
    }
  }

  /**
   * Test for 2-bit characteristics. A characteristic is a delta in the input which is repeated in
   * the output. For example, if f() is a block cipher and c is a characteristic, then f(x^c) =
   * f(x)^c with greater than expected probability. The test for funneling is merely a test for
   * 1-bit characteristics.
   *

      this.valueComparator = checkNotNull(valueComparator);
      return this;
    }

    @CanIgnoreReturnValue
    Builder<K, V> combine(Builder<K, V> other) {
      if (other.builderMap != null) {
        for (Map.Entry<K, ImmutableCollection.Builder<V>> entry : other.builderMap.entrySet()) {
          putAll(entry.getKey(), entry.getValue().build());
        }
      }
      return this;
    }

		Help:      "Total number of bytes sent to the other peer nodes",
		Type:      counterMetric,
	}
}

func getInterNodeReceivedBytesMD() MetricDescription {
	return MetricDescription{
		Namespace: interNodeMetricNamespace,
		Subsystem: trafficSubsystem,
		Name:      receivedBytes,
		Help:      "Total number of bytes received from other peer nodes",
		Type:      counterMetric,
	}
}

    /** Search log access type for admin interface. */
    public static final String SEARCH_LOG_ACCESS_TYPE_ADMIN = "admin";

    /** Search log access type for other interfaces. */
    public static final String SEARCH_LOG_ACCESS_TYPE_OTHER = "other";

    /** Results per page parameter name. */
    public static final String RESULTS_PER_PAGE = "resultsPerPage";

    /** User code parameter name. */

Aber irgendwann gab es keine andere Möglichkeit, als etwas zu schaffen, das all diese Funktionen bereitstellte, die besten Ideen früherer Tools aufnahm und diese auf die bestmögliche Weise kombinierte, wobei Sprachfunktionen verwendet wurden, die vorher noch nicht einmal verfügbar waren (Python 3.6+ Typhinweise).

## Vorherige Tools { #previous-tools }

### [Django](https://www.djangoproject.com/) { #django }

pkg crypto/cipher, func NewGCMWithTagSize(Block, int) (AEAD, error)
pkg crypto/rsa, method (*PrivateKey) Size() int
pkg crypto/rsa, method (*PublicKey) Size() int
pkg crypto/tls, method (*ConnectionState) ExportKeyingMaterial(string, []uint8, int) ([]uint8, error)
pkg database/sql, method (IsolationLevel) String() string
pkg database/sql, type DBStats struct, Idle int
pkg database/sql, type DBStats struct, InUse int

		return
	}

	// if Content-Length is unknown/missing, throw away
	size := r.ContentLength

	rAuthType := getRequestAuthType(r)
	// For auth type streaming signature, we need to gather a different content length.
	switch rAuthType {
	// Check signature types that must have content length
	case authTypeStreamingSigned, authTypeStreamingSignedTrailer, authTypeStreamingUnsignedTrailer: