[3.15] gh-149319: Make `asyncio` REPL respect `-I` and `-E` options (GH-149405) ...

gh-149319: Make `asyncio` REPL respect `-I` and `-E` options (GH-149405)
(cherry picked from commit 7f8fc07e850d7b27a220c815db8c8abd545286c3)

Co-authored-by: Jonathan Dung <jonathandung@yahoo.com>

diff --git a/Lib/asyncio/__main__.py b/Lib/asyncio/__main__.py
index 7f0565d0b8ddc765b9c864f89fcd5e67bf1576ba..708fdd595971e85432793d250c4582792696de0c 100644 (file)
--- a/Lib/asyncio/__main__.py
+++ b/Lib/asyncio/__main__.py
@@ -99,7 +99,7 @@ class REPLThread(threading.Thread):
 
                 console.write(banner)
 
-            if not sys.flags.isolated and (startup_path := os.getenv("PYTHONSTARTUP")):
+            if not sys.flags.ignore_environment and (startup_path := os.getenv("PYTHONSTARTUP")):
                 sys.audit("cpython.run_startup", startup_path)
                 try:
                     import tokenize
@@ -200,7 +200,7 @@ if __name__ == '__main__':
 
     sys.audit("cpython.run_stdin")
 
-    if os.getenv('PYTHON_BASIC_REPL'):
+    if not sys.flags.ignore_environment and os.getenv('PYTHON_BASIC_REPL'):
         CAN_USE_PYREPL = False
     else:
         try:

diff --git a/Misc/NEWS.d/next/Library/2026-05-06-23-13-40.gh-issue-149319.PLM93t.rst b/Misc/NEWS.d/next/Library/2026-05-06-23-13-40.gh-issue-149319.PLM93t.rst
new file mode 100644 (file)
index 0000000..4018ec4
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-05-06-23-13-40.gh-issue-149319.PLM93t.rst
@@ -0,0 +1 @@
+The :mod:`asyncio` REPL now ignores :envvar:`PYTHONSTARTUP` and :envvar:`PYTHON_BASIC_REPL` when :option:`-E` or :option:`-I` is used. Patch by Jonathan Dung.