A dictionary's keys are *almost* arbitrary values. Values that are not
:term:`hashable`, that is, values containing lists, dictionaries or other
mutable types (that are compared by value rather than by object identity) may
-not be used as keys. Numeric types used for keys obey the normal rules for
-numeric comparison: if two numbers compare equal (such as ``1`` and ``1.0``)
-then they can be used interchangeably to index the same dictionary entry. (Note
-however, that since computers store floating-point numbers as approximations it
-is usually unwise to use them as dictionary keys.)
+not be used as keys.
+Values that compare equal (such as ``1``, ``1.0``, and ``True``)
+can be used interchangeably to index the same dictionary entry.
.. class:: dict(**kwargs)
dict(mapping, **kwargs)