Simplify implementation

Lib/_pyrepl/simple_interact.py

@@ -27,6 +27,7 @@
 
 import _sitebuiltins
 import linecache
+import builtins
 import sys
 import code
 from types import ModuleType
@@ -73,20 +74,28 @@ def _clear_screen():
     "clear": _clear_screen,
 }
 
+DEFAULT_NAMESPACE = {
+    '__name__': '__main__',
+    '__doc__': None,
+    '__package__': None,
+    '__loader__': None,
+    '__spec__': None,
+    '__annotations__': {},
+    '__builtins__': builtins,
+}
 
 def run_multiline_interactive_console(
     mainmodule: ModuleType | None = None,
     future_flags: int = 0,
     console: code.InteractiveConsole | None = None,
 ) -> None:
-    import __main__
     from .readline import _setup
     _setup()
 
-    mainmodule = mainmodule or __main__
+    namespace = mainmodule.__dict__ if mainmodule else DEFAULT_NAMESPACE
     if console is None:
         console = InteractiveColoredConsole(
-            mainmodule.__dict__, filename="<stdin>"
+            namespace, filename="<stdin>"
         )
     if future_flags:
         console.compile.compiler.flags |= future_flags

Lib/test/test_pyrepl/test_pyrepl.py

@@ -10,6 +10,7 @@
 import termios
 from unittest import TestCase
 from unittest.mock import patch
+from test.support import force_not_colorized
 
 from .support import (
     FakeConsole,
@@ -837,13 +838,15 @@ def test_bracketed_paste_single_line(self):
 
 
 class TestMain(TestCase):
+    @force_not_colorized
     def test_exposed_globals_in_repl(self):
         expected_output = (
-            "['__annotations__', '__builtins__', '__cached__', '__doc__', '__file__', "
-            "'__loader__', '__name__', '__package__', '__spec__', 'interactive_console']"
+            '["__annotations__", "__builtins__", "__doc__", "__loader__", '
+            '"__name__", "__package__", "__spec__"]'
         )
-        output, exit_code = self.run_repl(["dir()", "exit"])
+        output, exit_code = self.run_repl(["sorted(dir())", "exit"])
         self.assertEqual(exit_code, 0)
+        output = output.replace("\'", '"')
         self.assertIn(expected_output, output)
 
     def test_dumb_terminal_exits_cleanly(self):
@@ -865,7 +868,7 @@ def run_repl(self, repl_input: str | list[str], env: dict | None = None) -> tupl
             text=True,
             close_fds=True,
             env=env if env else os.environ,
-        )
+       )
         if isinstance(repl_input, list):
             repl_input = "\n".join(repl_input) + "\n"
         os.write(master_fd, repl_input.encode("utf-8"))