Jedes Attribut eines Pydantic-Modells hat einen Typ.

Aber dieser Typ kann selbst ein anderes Pydantic-Modell sein.

Sie können also tief verschachtelte JSON-„Objekte“ deklarieren, mit spezifischen Attributnamen, -typen, und -validierungen.

Alles das beliebig tief verschachtelt.

### Ein Kindmodell definieren { #define-a-submodel }

Für ein Beispiel können wir ein `Image`-Modell definieren.

    MapDifference<Integer, Integer> diff = Maps.difference(EMPTY, EMPTY);
    assertTrue(diff.areEqual());
    assertEquals(EMPTY, diff.entriesOnlyOnLeft());
    assertEquals(EMPTY, diff.entriesOnlyOnRight());
    assertEquals(EMPTY, diff.entriesInCommon());
    assertEquals(EMPTY, diff.entriesDiffering());
    assertEquals("equal", diff.toString());
  }

  public void testMapDifferenceEmptySingleton() {

        context.putUserData(CURRENT_ACCESSORS_OF_UPGRADED_PROPERTIES, diff(
            currentAccessorsOfUpgradedProperties(currentUpgradedProperties),
            currentAccessorsOfUpgradedProperties(baselineUpgradedProperties)
        ));
        context.putUserData(OLD_REMOVED_ACCESSORS_OF_UPGRADED_PROPERTIES, diff(
            oldRemovedAccessorsOfUpgradedProperties(currentUpgradedProperties),

          }

          X deltaToFloor = minus(x, roundFloor);
          X deltaToCeiling = minus(roundCeiling, x);
          int diff = deltaToFloor.compareTo(deltaToCeiling);
          if (diff < 0) { // closer to floor
            return roundFloorAsDouble;
          } else if (diff > 0) { // closer to ceiling
            return roundCeilingAsDouble;
          }

		}
		nano := t.UnixNano()
		if group > 0 {
			for k := range timeOccurrenceMap {
				if k == nano {
					// We add to ourself later
					continue
				}
				diff := k - nano
				if diff < 0 {
					diff = -diff
				}
				// We are within the limit
				if diff < groupNano {
					timeOccurrenceMap[k]++
				}
			}
		}
		// Add ourself...
		timeOccurrenceMap[nano]++
	}

# Auto detect text files and perform LF normalization
*        text=auto

*.java   text diff=java
*.html   text diff=html
*.css    text
*.js     text
*.sql    text
*.jar    binary

sleep 1

./mc ls -r --versions myminio1/testbucket/dir/ >/tmp/dir_1.txt
./mc ls -r --versions myminio2/testbucket/dir/ >/tmp/dir_2.txt

out=$(diff -qpruN /tmp/dir_1.txt /tmp/dir_2.txt)
ret=$?
if [ $ret -ne 0 ]; then
	echo "BUG: expected no 'diff' after replication: $out"
	exit 1

./mc ls -r myminio/versioned >decommissioned_ns.txt
./mc ls -r --versions myminio/versioned >decommissioned_ns_versions.txt

out=$(diff -qpruN expanded_ns.txt decommissioned_ns.txt)
ret=$?
if [ $ret -ne 0 ]; then
	echo "BUG: expected no missing entries after decommission: $out"
	exit 1
fi

out=$(diff -qpruN expanded_ns_versions.txt decommissioned_ns_versions.txt)
ret=$?
if [ $ret -ne 0 ]; then

./mc ls -r --versions myminio/versioned-1 >decommissioned_ns_versions_1.txt

out=$(diff -qpruN expanded_ns.txt decommissioned_ns.txt)
ret=$?
if [ $ret -ne 0 ]; then
	echo "BUG: expected no missing entries after decommission: $out"
	exit 1
fi

out=$(diff -qpruN expanded_ns_versions.txt decommissioned_ns_versions.txt)
ret=$?
if [ $ret -ne 0 ]; then

# Unterabhängigkeiten { #sub-dependencies }

Sie können Abhängigkeiten erstellen, die **Unterabhängigkeiten** haben.

Diese können so **tief** verschachtelt sein, wie nötig.

**FastAPI** kümmert sich darum, sie aufzulösen.

## Erste Abhängigkeit, „Dependable“ { #first-dependency-dependable }

Sie könnten eine erste Abhängigkeit („Dependable“) wie folgt erstellen:

{* ../../docs_src/dependencies/tutorial005_an_py310.py hl[8:9] *}