gh-102567: Add -X importtime=2 for logging an importtime message for already-loaded modules (#118655)

Co-authored-by: Adam Turner <9087854+aa-turner@users.noreply.github.com>

Lib/_pyrepl/windows_console.py

@@ -24,6 +24,7 @@
 import sys
 
 import ctypes
+import types
 from ctypes.wintypes import (
     _COORD,
     WORD,
@@ -58,6 +59,12 @@ def __init__(self, err: int | None, descr: str | None = None) -> None:
             self.err = err
             self.descr = descr
 
+# declare nt optional to allow None assignment on other platforms
+nt: types.ModuleType | None
+try:
+    import nt
+except ImportError:
+    nt = None
 
 TYPE_CHECKING = False
 
@@ -121,9 +128,8 @@ class _error(Exception):
 
 def _supports_vt():
     try:
-        import nt
         return nt._supports_virtual_terminal()
-    except (ImportError, AttributeError):
+    except AttributeError:
         return False
 
 class WindowsConsole(Console):
@@ -235,11 +241,9 @@ def refresh(self, screen: list[str], c_xy: tuple[int, int]) -> None:
 
     @property
     def input_hook(self):
-        try:
-            import nt
-        except ImportError:
-            return None
-        if nt._is_inputhook_installed():
+        # avoid inline imports here so the repl doesn't get flooded
+        # with import logging from -X importtime=2
+        if nt is not None and nt._is_inputhook_installed():
             return nt._inputhook
 
     def __write_changed_line(