Index: Lib/idlelib/ScriptBinding.py
===================================================================
--- Lib/idlelib/ScriptBinding.py	(révision 66703)
+++ Lib/idlelib/ScriptBinding.py	(copie de travail)
@@ -38,6 +38,28 @@
 by Format->Untabify Region and specify the number of columns used by each tab.
 """
 
+# See also PyTokenizer_FindEncoding() and get_coding_spec()
+# in Parser/tokenizer.c
+def detect_encoding(filename, default_encoding='ASCII'):
+    """
+    Detect the encoding of a Python script: find the "#coding:" header at line
+    1 or line 2.
+    """
+    # Match "coding: utf8" or "coding=ISO-88596-1"
+    coding_regex = re.compile('#.*coding[:=][ \t]+([a-z0-9._-]+)', re.IGNORECASE)
+    with open(filename, 'rb') as f:
+        data = f.read(4096)
+        lines = re.split(b'[\r\n]+', data)
+        for number, line in enumerate(lines):
+            if number == 2:
+                break
+            line = str(line, 'ASCII')
+            match = coding_regex.match(line)
+            if not match:
+                continue
+            return match.group(1)
+    return default_encoding
+
 class ScriptBinding:
 
     menudefs = [
@@ -53,16 +75,17 @@
         self.root = self.editwin.root
 
     def check_module_event(self, event):
+        encoding = detect_encoding(filename)
         filename = self.getfilename()
         if not filename:
             return 'break'
-        if not self.checksyntax(filename):
+        if not self.checksyntax(filename, encoding):
             return 'break'
-        if not self.tabnanny(filename):
+        if not self.tabnanny(filename, encoding):
             return 'break'
 
-    def tabnanny(self, filename):
-        f = open(filename, 'r')
+    def tabnanny(self, filename, encoding):
+        f = open(filename, 'r', encoding=encoding)
         try:
             tabnanny.process_tokens(tokenize.generate_tokens(f.readline))
         except tokenize.TokenError as msg:
@@ -78,11 +101,11 @@
             return False
         return True
 
-    def checksyntax(self, filename):
+    def checksyntax(self, filename, encoding):
         self.shell = shell = self.flist.open_shell()
         saved_stream = shell.get_warning_stream()
         shell.set_warning_stream(shell.stderr)
-        f = open(filename, 'r')
+        f = open(filename, 'r', encoding=encoding)
         source = f.read()
         f.close()
         if '\r' in source:
@@ -121,10 +144,11 @@
         filename = self.getfilename()
         if not filename:
             return 'break'
-        code = self.checksyntax(filename)
+        encoding = detect_encoding(filename)
+        code = self.checksyntax(filename, encoding)
         if not code:
             return 'break'
-        if not self.tabnanny(filename):
+        if not self.tabnanny(filename, encoding):
             return 'break'
         shell = self.shell
         interp = shell.interp