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venv/Lib/site-packages/django/contrib/postgres/lookups.py

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+from django.db.models import Transform
+from django.db.models.lookups import PostgresOperatorLookup
+
+from .search import SearchVector, SearchVectorExact, SearchVectorField
+
+
+class DataContains(PostgresOperatorLookup):
+    lookup_name = 'contains'
+    postgres_operator = '@>'
+
+
+class ContainedBy(PostgresOperatorLookup):
+    lookup_name = 'contained_by'
+    postgres_operator = '<@'
+
+
+class Overlap(PostgresOperatorLookup):
+    lookup_name = 'overlap'
+    postgres_operator = '&&'
+
+
+class HasKey(PostgresOperatorLookup):
+    lookup_name = 'has_key'
+    postgres_operator = '?'
+    prepare_rhs = False
+
+
+class HasKeys(PostgresOperatorLookup):
+    lookup_name = 'has_keys'
+    postgres_operator = '?&'
+
+    def get_prep_lookup(self):
+        return [str(item) for item in self.rhs]
+
+
+class HasAnyKeys(HasKeys):
+    lookup_name = 'has_any_keys'
+    postgres_operator = '?|'
+
+
+class Unaccent(Transform):
+    bilateral = True
+    lookup_name = 'unaccent'
+    function = 'UNACCENT'
+
+
+class SearchLookup(SearchVectorExact):
+    lookup_name = 'search'
+
+    def process_lhs(self, qn, connection):
+        if not isinstance(self.lhs.output_field, SearchVectorField):
+            config = getattr(self.rhs, 'config', None)
+            self.lhs = SearchVector(self.lhs, config=config)
+        lhs, lhs_params = super().process_lhs(qn, connection)
+        return lhs, lhs_params
+
+
+class TrigramSimilar(PostgresOperatorLookup):
+    lookup_name = 'trigram_similar'
+    postgres_operator = '%%'
+
+
+class TrigramWordSimilar(PostgresOperatorLookup):
+    lookup_name = 'trigram_word_similar'
+    postgres_operator = '%%>'