bpo-37268: Add deprecation notice and a DeprecationWarning for the parser module (GH-15017)

Deprecate the parser module and add a deprecation warning triggered on import and a warning block in the documentation.





https://bugs.python.org/issue37268



Automerge-Triggered-By: @pablogsal

1 files changed, 9 insertions, 0 deletions

diff --git a/Lib/test/test_parser.py b/Lib/test/test_parser.py
index e5285c6..ec1845d 100644
--- a/Lib/test/test_parser.py
+++ b/Lib/test/test_parser.py
@@ -6,6 +6,7 @@ import operator
 import struct
 from test import support
 from test.support.script_helper import assert_python_failure
+from test.support.script_helper import assert_python_ok
 
 #
 #  First, we test that we can generate trees from valid source fragments,
@@ -987,5 +988,13 @@ class OtherParserCase(unittest.TestCase):
         with self.assertRaises(TypeError):
             parser.expr("a", "b")
 
+
+class TestDeprecation(unittest.TestCase):
+    def test_deprecation_message(self):
+        code = "def f():\n  import parser\n\nf()"
+        rc, out, err = assert_python_ok('-c', code)
+        self.assertIn(b'<string>:2: DeprecationWarning', err)
+
+
 if __name__ == "__main__":
     unittest.main()