Initial commit. Basic models mostly done.

venv/lib/python3.8/site-packages/django/utils/hashable.py

@@ -0,0 +1,19 @@
+from django.utils.itercompat import is_iterable
+
+
+def make_hashable(value):
+    if isinstance(value, dict):
+        return tuple([
+            (key, make_hashable(nested_value))
+            for key, nested_value in value.items()
+        ])
+    # Try hash to avoid converting a hashable iterable (e.g. string, frozenset)
+    # to a tuple.
+    try:
+        hash(value)
+    except TypeError:
+        if is_iterable(value):
+            return tuple(map(make_hashable, value))
+        # Non-hashable, non-iterable.
+        raise
+    return value