Don't reify lazy imports when completing global names in the REPL

fancycompleter's global_matches() eval()ed every matching name to pick
its color, which imported lazily imported modules on <Tab>. Look the
value up in the namespace and builtins instead, as rlcompleter does.

Author: brittanyrey

Lib/_pyrepl/fancycompleter.py

@@ -4,6 +4,7 @@
 #                        All Rights Reserved
 """Colorful tab completion for Python prompt"""
 from _colorize import ANSIColors, get_colors, get_theme
+import builtins
 import rlcompleter
 import keyword
 import types
@@ -112,10 +113,8 @@ def global_matches(self, text):
             if keyword.iskeyword(clean_name) or keyword.issoftkeyword(clean_name):
                 values.append(None)
             else:
-                try:
-                    values.append(eval(name, self.namespace))
-                except Exception:
-                    values.append(None)
+                values.append(self.namespace.get(
+                    clean_name, builtins.__dict__.get(clean_name)))
         if self.use_colors and names:
             return self.colorize_matches(names, values)
         return names

Lib/test/test_pyrepl/test_fancycompleter.py

@@ -142,6 +142,13 @@ def test_module_attributes_do_not_reify_lazy_imports(self):
             self.assertEqual(compl.attr_matches(f"{name}.j"), [f"{name}.json"])
             self.assertIs(type(module.__dict__["json"]), types.LazyImportType)
 
+    def test_globals_do_not_reify_lazy_imports(self):
+        namespace = {}
+        exec("lazy import json\nlazy import jsonz_missing\n", namespace)
+        compl = Completer(namespace, use_colors=True)
+        self.assertEqual(len(compl.global_matches("json")), 2)
+        self.assertIs(type(namespace["json"]), types.LazyImportType)
+
     def test_complete_colored_single_match(self):
         """No coloring, via commonprefix."""
         compl = Completer({'foobar': 42}, use_colors=True)

Misc/NEWS.d/next/Library/2026-10-12-21-30-26.gh-issue-159266.YNpnaG.rst

@@ -0,0 +1,2 @@
+Tab completion of global names in the :term:`REPL` no longer imports
+lazily imported modules.