DOC: Use correct constructor for unit subclasses.

QuLogic · QuLogic · commit 46ad1c94e48c · 2021-03-24T19:59:38.000-04:00
Use `object.__new__` was raising for _everything_ that wasn't an
`object` (aka, everything in the examples). It's necessary to use the
actual class's `__new__`, which fixes the special initialization that
was in the `try`.
diff --git a/examples/units/basic_units.py b/examples/units/basic_units.py
@@ -127,7 +127,7 @@ def __new__(cls, value, unit):
                 methods['__getitem__'] = cls._getitem
             subcls = type(f'TaggedValue_of_{value_class.__name__}',
                           (cls, value_class), methods)
-            return object.__new__(subcls)
+            return value_class.__new__(subcls)
         except TypeError:
             return object.__new__(cls)
 
