Issue #9549: sys.setdefaultencoding() and PyUnicode_SetDefaultEncoding()

are now removed, since their effect was inexistent in 3.x (the default
encoding is hardcoded to utf-8 and cannot be changed).

Lib/site.py

@@ -460,25 +460,6 @@ def aliasmbcs():
                 encodings._cache[enc] = encodings._unknown
                 encodings.aliases.aliases[enc] = 'mbcs'
 
-def setencoding():
-    """Set the string encoding used by the Unicode implementation.  The
-    default is 'ascii', but if you're willing to experiment, you can
-    change this."""
-    encoding = "ascii" # Default value set by _PyUnicode_Init()
-    if 0:
-        # Enable to support locale aware default string encodings.
-        import locale
-        loc = locale.getdefaultlocale()
-        if loc[1]:
-            encoding = loc[1]
-    if 0:
-        # Enable to switch off string to Unicode coercion and implicit
-        # Unicode to string conversion.
-        encoding = "undefined"
-    if encoding != "ascii":
-        # On Non-Unicode builds this will raise an AttributeError...
-        sys.setdefaultencoding(encoding) # Needs Python Unicode build !
-
 
 def execsitecustomize():
     """Run custom site specific code, if available."""
@@ -527,15 +508,9 @@ def main():
     setcopyright()
     sethelper()
     aliasmbcs()
-    setencoding()
     execsitecustomize()
     if ENABLE_USER_SITE:
         execusercustomize()
-    # Remove sys.setdefaultencoding() so that users cannot change the
-    # encoding after initialization.  The test for presence is needed when
-    # this module is run as a script, because this code is executed twice.
-    if hasattr(sys, "setdefaultencoding"):
-        del sys.setdefaultencoding
 
 main()
 

Lib/test/test_site.py

@@ -29,10 +29,6 @@ if not os.path.isdir(site.USER_SITE):
 
 class HelperFunctionsTests(unittest.TestCase):
     """Tests for helper functions.
-
-    The setting of the encoding (set using sys.setdefaultencoding) used by
-    the Unicode implementation is not tested.
-
     """
 
     def setUp(self):
@@ -333,10 +329,6 @@ class ImportSideEffectTests(unittest.TestCase):
                 else:
                     self.fail("did not alias mbcs")
 
-    def test_setdefaultencoding_removed(self):
-        # Make sure sys.setdefaultencoding is gone
-        self.assertTrue(not hasattr(sys, "setdefaultencoding"))
-
     def test_sitecustomize_executed(self):
         # If sitecustomize is available, it should have been imported.
         if "sitecustomize" not in sys.modules: