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7 changes: 3 additions & 4 deletions Doc/library/typing.rst
Original file line number Diff line number Diff line change
Expand Up @@ -1458,10 +1458,9 @@ for creating generic types.
Note that type variables can be *bound*, *constrained*, or neither, but
cannot be both bound *and* constrained.

Created type variables may be explicitly marked covariant or contravariant by passing
``covariant=True`` or ``contravariant=True``.
By default, type variables are invariant.
See :pep:`484` and :pep:`695` for more details.
Type variables may be marked covariant or contravariant by passing
``covariant=True`` or ``contravariant=True``. See :pep:`484` for more
details. By default, type variables are invariant.

Bound type variables and constrained type variables have different
semantics in several important ways. Using a *bound* type variable means
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