https://github.com/python/cpython/commit/77a19c81f598ff1de2499eff4362b208ebb6f7ec
commit: 77a19c81f598ff1de2499eff4362b208ebb6f7ec
branch: 3.13
author: Miss Islington (bot) <[email protected]>
committer: picnixz <[email protected]>
date: 2026-07-19T12:07:03+02:00
summary:

[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 7f8fc07e850d7b27a220c815db8c8abd545286c3)

Co-authored-by: Jonathan Dung <[email protected]>

files:
A Misc/NEWS.d/next/Library/2026-05-06-23-13-40.gh-issue-149319.PLM93t.rst
M Lib/asyncio/__main__.py

diff --git a/Lib/asyncio/__main__.py b/Lib/asyncio/__main__.py
index 2effdbc38da2561..e734be08ddaa497 100644
--- a/Lib/asyncio/__main__.py
+++ b/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
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
index 000000000000000..4018ec43f5a47d9
--- /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.

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