@@ -165,6 +165,7 @@ ignore = [
 "D401", # do not always require imperative mood in first line
 "FBT001", "FBT002", "FBT003", # allow boolean parameters
 "ISC001", # allow string literal concatenation for auto-formatting
+"PLC0415", # allow run-time imports to avoid circular dependencies
 "PGH003", # type ignores do not need to be specific
 "PLR2004", # allow some "magic" values
 "PYI034", # do not check return value of new method

@@ -64,7 +64,7 @@ class FormattedPendingResult(TypedDict, total=False):
 label: str
 
 
-class PendingResult:
+class PendingResult: # noqa: PLW1641
 """Pending execution result"""
 
 id: str
@@ -127,7 +127,7 @@ class FormattedCompletedResult(TypedDict, total=False):
 errors: list[GraphQLFormattedError]
 
 
-class CompletedResult:
+class CompletedResult: # noqa: PLW1641
 """Completed execution result"""
 
 id: str
@@ -192,7 +192,7 @@ class FormattedExecutionResult(TypedDict, total=False):
 extensions: dict[str, Any]
 
 
-class ExecutionResult:
+class ExecutionResult: # noqa: PLW1641
 """The result of GraphQL execution.
 
 - ``data`` is the result of a successful execution of the query.
@@ -267,7 +267,7 @@ class FormattedInitialIncrementalExecutionResult(TypedDict, total=False):
 extensions: dict[str, Any]
 
 
-class InitialIncrementalExecutionResult:
+class InitialIncrementalExecutionResult: # noqa: PLW1641
 """Initial incremental execution result."""
 
 data: dict[str, Any] | None
@@ -369,7 +369,7 @@ class FormattedIncrementalDeferResult(TypedDict, total=False):
 extensions: dict[str, Any]
 
 
-class IncrementalDeferResult:
+class IncrementalDeferResult: # noqa: PLW1641
 """Incremental deferred execution result"""
 
 data: dict[str, Any]
@@ -461,7 +461,7 @@ class FormattedIncrementalStreamResult(TypedDict, total=False):
 extensions: dict[str, Any]
 
 
-class IncrementalStreamResult:
+class IncrementalStreamResult: # noqa: PLW1641
 """Incremental streamed execution result"""
 
 items: list[Any]
@@ -560,7 +560,7 @@ class FormattedSubsequentIncrementalExecutionResult(TypedDict, total=False):
 extensions: dict[str, Any]
 
 
-class SubsequentIncrementalExecutionResult:
+class SubsequentIncrementalExecutionResult: # noqa: PLW1641
 """Subsequent incremental execution result."""
 
 __slots__ = "completed", "extensions", "has_next", "incremental", "pending"

@@ -41,6 +41,9 @@ def __eq__(self, other: object) -> bool:
 def __ne__(self, other: object) -> bool:
 return not self == other
 
+def __hash__(self) -> int:
+return hash((self.line, self.column))
+
 
 def get_location(source: Source, position: int) -> SourceLocation:
 """Get the line and column for a character position in the source.

@@ -72,6 +72,9 @@ def __eq__(self, other: object) -> bool:
 def __ne__(self, other: object) -> bool:
 return not self == other
 
+def __hash__(self) -> int:
+return hash(self.body)
+
 
 def is_source(source: Any) -> TypeGuard[Source]:
 """Test if the given value is a Source object.

@@ -171,7 +171,7 @@ def trunc_list(s: list) -> list:
 if len(s) > max_list_size:
 i = max_list_size // 2
 j = i - 1
-s = s[:i] + [ELLIPSIS] + s[-j:]
+s = [*s[:i], ELLIPSIS, *s[-j:]]
 return s
 
 

@@ -479,7 +479,7 @@ class GraphQLFieldKwargs(TypedDict, total=False):
 ast_node: FieldDefinitionNode | None
 
 
-class GraphQLField:
+class GraphQLField: # noqa: PLW1641
 """Definition of a GraphQL field"""
 
 type: GraphQLOutputType
@@ -644,7 +644,7 @@ class GraphQLArgumentKwargs(TypedDict, total=False):
 ast_node: InputValueDefinitionNode | None
 
 
-class GraphQLArgument:
+class GraphQLArgument: # noqa: PLW1641
 """Definition of a GraphQL argument"""
 
 type: GraphQLInputType
@@ -1219,7 +1219,7 @@ class GraphQLEnumValueKwargs(TypedDict, total=False):
 ast_node: EnumValueDefinitionNode | None
 
 
-class GraphQLEnumValue:
+class GraphQLEnumValue: # noqa: PLW1641
 """A GraphQL enum value."""
 
 value: Any
@@ -1394,7 +1394,7 @@ class GraphQLInputFieldKwargs(TypedDict, total=False):
 ast_node: InputValueDefinitionNode | None
 
 
-class GraphQLInputField:
+class GraphQLInputField: # noqa: PLW1641
 """Definition of a GraphQL input field"""
 
 type: GraphQLInputType

@@ -49,7 +49,7 @@ class GraphQLDirectiveKwargs(TypedDict, total=False):
 ast_node: ast.DirectiveDefinitionNode | None
 
 
-class GraphQLDirective:
+class GraphQLDirective: # noqa: PLW1641
 """GraphQL Directive
 
 Directives are used by the GraphQL runtime as a way of modifying execution behavior.

@@ -48,7 +48,7 @@ def ast_to_dict(
 res.update(
 {
 key: ast_to_dict(getattr(node, key), locations, cache)
-for key in ("kind",) + node.keys[1:]
+for key in ("kind", *node.keys[1:])
 }
 )
 if locations:

@@ -214,7 +214,7 @@ def can_compare_pending_result():
 assert result == tuple(args.values())
 assert result == tuple(args.values())[:2]
 assert result != tuple(args.values())[:1]
-assert result != tuple(args.values())[:1] + (["bar", 2],)
+assert result != (*tuple(args.values())[:1], ["bar", 2])
 assert result == args
 assert result != {**args, "id": "bar"}
 assert result != {**args, "path": ["bar", 2]}
@@ -239,7 +239,7 @@ def can_compare_completed_result():
 )
 assert result == tuple(args.values())
 assert result != tuple(args.values())[:1]
-assert result != tuple(args.values())[:1] + ([GraphQLError("oops")],)
+assert result != (*tuple(args.values())[:1], [GraphQLError("oops")])
 assert result == args
 assert result != {**args, "id": "bar"}
 assert result != {**args, "errors": [{"message": "oops"}]}

@@ -41,3 +41,10 @@ def can_compare_with_formatted_location():
 different_location = SourceLocation(2, 2).formatted
 assert not location == different_location # noqa: SIM201
 assert location != different_location
+
+def can_be_hashed():
+location = SourceLocation(1, 2)
+same_location = SourceLocation(1, 2)
+assert hash(location) == hash(same_location)
+different_location = SourceLocation(2, 2)
+assert hash(location) != hash(different_location)

@@ -69,6 +69,13 @@ def can_be_compared():
 assert not source == "bar" # noqa: SIM201
 assert source != "bar"
 
+def can_be_hashed():
+source = Source("foo")
+same_source = Source("foo")
+assert hash(source) == hash(same_source)
+different_source = Source("bar")
+assert hash(source) != hash(different_source)
+
 def can_create_weak_reference():
 source = Source("foo")
 ref = weakref.ref(source)

@@ -28,7 +28,7 @@ def can_create_a_map_with_scalar_keys_and_values():
 assert list(m.items()) == [("a", 1), ("b", 2), ("c", 3)]
 for k, v in m.items():
 assert k in m
-assert m[k] == v
+assert m[k] == v # noqa: PLR1733
 assert m.get(k) == v
 assert v not in m
 with pytest.raises(KeyError):
@@ -65,7 +65,7 @@ def can_create_a_map_with_three_objects_as_keys():
 assert list(m.items()) == [(obj1, 1), (obj2, 2), (obj3, 3)]
 for k, v in m.items():
 assert k in m
-assert m[k] == v
+assert m[k] == v # noqa: PLR1733
 assert m.get(k) == v
 assert v not in m
 with pytest.raises(KeyError):

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from math import nan
+from math import isnan, nan
 from typing import Any, NamedTuple
 
 import pytest
@@ -91,7 +91,7 @@ def returns_no_error_for_null_result():
 
 def returns_no_error_for_nan_result():
 result = _coerce_value({"value": nan}, TestScalar)
-assert expect_value(result) is nan
+assert isnan(expect_value(result))
 
 def returns_an_error_for_undefined_result():
 result = _coerce_value({"value": Undefined}, TestScalar)
@@ -371,7 +371,7 @@ def returns_nan_as_value():
 result = _coerce_value({}, _get_test_input_object(nan))
 result_value = expect_value(result)
 assert "foo" in result_value
-assert result_value["foo"] is nan
+assert isnan(result_value["foo"])
 
 def describe_for_graphql_list():
 TestList = GraphQLList(GraphQLInt)

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from math import nan
+from math import isnan, nan
 from typing import Any
 
 from graphql.language import FloatValueNode, IntValueNode, parse_value
@@ -14,8 +14,8 @@ def _compare_value(value: Any, expected: Any):
 assert value is None
 elif expected is Undefined:
 assert value is Undefined
-elif expected is nan:
-assert value is nan
+elif isinstance(expected, float) and isnan(expected):
+assert isnan(value)
 else:
 assert value == expected
 
@@ -65,7 +65,7 @@ def parses_variables():
 _expect_value_from_vars("$testVariable", None, Undefined)
 
 def parse_invalid_int_as_nan():
-assert value_from_ast_untyped(IntValueNode(value="invalid")) is nan
+assert isnan(value_from_ast_untyped(IntValueNode(value="invalid")))
 
 def parse_invalid_float_as_nan():
-assert value_from_ast_untyped(FloatValueNode(value="invalid")) is nan
+assert isnan(value_from_ast_untyped(FloatValueNode(value="invalid")))