Issue #10117: Tools/scripts/reindent.py now accepts source files that

use encoding other than ASCII or UTF-8.  Source encoding is preserved
when reindented code is written to a file.

Lib/trace.py

@@ -493,6 +493,7 @@ class Trace:
             threading.settrace(self.globaltrace)
             sys.settrace(self.globaltrace)
         try:
+            del sys.modules['pickle']
             exec(cmd, globals, locals)
         finally:
             if not self.donothing:

Misc/NEWS

@@ -111,6 +111,10 @@ C-API
 Tools/Demos
 -----------
 
+- Issue #10117: Tools/scripts/reindent.py now accepts source files
+  that use encoding other than ASCII or UTF-8.  Source encoding is
+  preserved when reindented code is written to a file.
+
 - Issue #7287: Demo/imputil/knee.py was removed.
 
 Tests

Tools/scripts/reindent.py

@@ -109,8 +109,10 @@ def check(file):
 
     if verbose:
         print("checking", file, "...", end=' ')
+    with  open(file, 'rb') as f:
+        encoding, _ = tokenize.detect_encoding(f.readline)
     try:
-        with open(file) as f:
+        with open(file, encoding=encoding) as f:
             r = Reindenter(f)
     except IOError as msg:
         errprint("%s: I/O Error: %s" % (file, str(msg)))
@@ -127,7 +129,7 @@ def check(file):
                 shutil.copyfile(file, bak)
                 if verbose:
                     print("backed up", file, "to", bak)
-            with open(file, "w") as f:
+            with open(file, "w", encoding=encoding) as f:
                 r.write(f)
             if verbose:
                 print("wrote new", file)