gh-103099: Link mypy docs from typing.rst (#103100)

diff --git a/Doc/library/typing.rst b/Doc/library/typing.rst
index 08ffa0310f0f2356e97e0617c79bf05bb16869dc..384458d3aa66189733c2e29420a6251cc0b0dbcd 100644 (file)
--- a/Doc/library/typing.rst
+++ b/Doc/library/typing.rst
@@ -41,10 +41,17 @@ For a summary of deprecated features and a deprecation timeline, please see
 
 .. seealso::
 
+   For a quick overview of type hints, refer to
+   `this cheat sheet <https://mypy.readthedocs.io/en/stable/cheat_sheet_py3.html>`_.
+
+   The "Type System Reference" section of https://mypy.readthedocs.io/ -- since
+   the Python typing system is standardised via PEPs, this reference should
+   broadly apply to most Python type checkers, although some parts may still be
+   specific to mypy.
+
    The documentation at https://typing.readthedocs.io/ serves as useful reference
    for type system features, useful typing related tools and typing best practices.
 
-
 .. _relevant-peps:
 
 Relevant PEPs