bpo-40759: Deprecate the symbol module

Doc/library/symbol.rst

@@ -17,6 +17,11 @@ the definitions of the names in the context of the language grammar.  The
 specific numeric values which the names map to may change between Python
 versions.
 
+.. warning::
+
+   The symbol module is deprecated and will be removed in future versions of
+   Python.
+
 This module also provides one additional data object:
 
 

Doc/whatsnew/3.9.rst

@@ -693,9 +693,10 @@ Deprecated
   Python versions it will raise a :exc:`TypeError` for all floats.
   (Contributed by Serhiy Storchaka in :issue:`37315`.)
 
-* The :mod:`parser` module is deprecated and will be removed in future versions
-  of Python. For the majority of use cases, users can leverage the Abstract Syntax
-  Tree (AST) generation and compilation stage, using the :mod:`ast` module.
+* The :mod:`parser` and :mod:`symbol` modules are deprecated and will be
+  removed in future versions of Python. For the majority of use cases,
+  users can leverage the Abstract Syntax Tree (AST) generation and compilation
+  stage, using the :mod:`ast` module.
 
 * Using :data:`NotImplemented` in a boolean context has been deprecated,
   as it is almost exclusively the result of incorrect rich comparator

Lib/symbol.py

@@ -11,6 +11,15 @@
 #
 #    make regen-symbol
 
+import warnings
+
+warnings.warn(
+    "The symbol module is deprecated and will be removed "
+    "in future versions of Python",
+    DeprecationWarning,
+    stacklevel=2,
+)
+
 #--start constants--
 single_input = 256
 file_input = 257

Misc/NEWS.d/next/Library/2020-05-24-23-52-35.bpo-40759.DdZdaw.rst

@@ -0,0 +1 @@
+Deprecate the :mod:`symbol` module.