Fix encoding to utf8 for autoreload (#15122)

Carreau · web-flow · commit 20f72255e2ff · 2026-02-10T11:46:40.000+01:00
Addresses issue #15116 by setting utf8 as the default encoding since this will not come for all platforms until Python 3.15.
diff --git a/IPython/extensions/deduperreload/deduperreload.py b/IPython/extensions/deduperreload/deduperreload.py
@@ -215,7 +215,7 @@ def update_sources(self) -> None:
                 self.source_by_modname[new_modname] = ""
                 continue
             try:
-                with open(fname, "r") as f:
+                with open(fname, "r", encoding="utf8") as f:
                     self.source_by_modname[new_modname] = f.read()
             except Exception as e:
                 logger = logging.getLogger("autoreload")
@@ -552,7 +552,7 @@ def maybe_reload_module(self, module: ModuleType) -> bool:
         if (fname := get_module_file_name(module)) is None:
             return False
         try:
-            with open(fname, "r") as f:
+            with open(fname, "r", encoding="utf8") as f:
                 new_source_code = f.read()
         except Exception as e:
             logger = logging.getLogger("autoreload")
