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venv/lib/python3.9/site-packages/graphql/pyutils/is_iterable.py

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+from collections.abc import Collection, Iterable, Mapping, ValuesView
+from typing import Any
+
+__all__ = ["is_collection", "is_iterable"]
+
+collection_types: Any = Collection
+if not isinstance({}.values(), Collection):  # Python < 3.7.2
+    collection_types = (Collection, ValuesView)
+iterable_types: Any = Iterable
+not_iterable_types: Any = (bytes, bytearray, memoryview, str, Mapping)
+
+
+def is_collection(value: Any) -> bool:
+    """Check if value is a collection, but not a string or a mapping."""
+    return isinstance(value, collection_types) and not isinstance(
+        value, not_iterable_types
+    )
+
+
+def is_iterable(value: Any) -> bool:
+    """Check if value is an iterable, but not a string or a mapping."""
+    return isinstance(value, iterable_types) and not isinstance(
+        value, not_iterable_types
+    )