[3.13] gh-149319: Make asyncio REPL respect -I and -E options (GH-149405) (#154073)

gh-149319: Make `asyncio` REPL respect `-I` and `-E` options (GH-149405)
(cherry picked from commit 7f8fc07)

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

Author: miss-islington

Lib/asyncio/__main__.py

@@ -94,7 +94,7 @@ def run(self):
 
                 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
@@ -148,7 +148,7 @@ def interrupt(self) -> None:
 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:
         from _pyrepl.main import CAN_USE_PYREPL

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.