gh-121790: Fix interactive console initialization (#121793)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>

1 files changed, 9 insertions, 18 deletions

diff --git a/Lib/asyncio/__main__.py b/Lib/asyncio/__main__.py
index 95147171c2b..8b5a4b8f282 100644
--- a/Lib/asyncio/__main__.py
+++ b/Lib/asyncio/__main__.py
@@ -97,30 +97,16 @@ class REPLThread(threading.Thread):
                     exec(startup_code, console.locals)
 
             ps1 = getattr(sys, "ps1", ">>> ")
-            if can_colorize():
+            if can_colorize() and CAN_USE_PYREPL:
                 ps1 = f"{ANSIColors.BOLD_MAGENTA}{ps1}{ANSIColors.RESET}"
             console.write(f"{ps1}import asyncio\n")
 
-            try:
-                import errno
-                if os.getenv("PYTHON_BASIC_REPL"):
-                    raise RuntimeError("user environment requested basic REPL")
-                if not os.isatty(sys.stdin.fileno()):
-                    return_code = errno.ENOTTY
-                    raise OSError(return_code, "tty required", "stdin")
-
-                # This import will fail on operating systems with no termios.
+            if CAN_USE_PYREPL:
                 from _pyrepl.simple_interact import (
-                    check,
                     run_multiline_interactive_console,
                 )
-                if err := check():
-                    raise RuntimeError(err)
-            except Exception as e:
-                console.interact(banner="", exitmsg="")
-            else:
                 try:
-                    run_multiline_interactive_console(console=console)
+                    run_multiline_interactive_console(console)
                 except SystemExit:
                     # expected via the `exit` and `quit` commands
                     pass
@@ -129,6 +115,8 @@ class REPLThread(threading.Thread):
                     console.showtraceback()
                     console.write("Internal error, ")
                     return_code = 1
+            else:
+                console.interact(banner="", exitmsg="")
         finally:
             warnings.filterwarnings(
                 'ignore',
@@ -139,7 +127,10 @@ class REPLThread(threading.Thread):
 
 
 if __name__ == '__main__':
-    CAN_USE_PYREPL = True
+    if os.getenv('PYTHON_BASIC_REPL'):
+        CAN_USE_PYREPL = False
+    else:
+        from _pyrepl.main import CAN_USE_PYREPL
 
     return_code = 0
     loop = asyncio.new_event_loop()