Do not enforce ASCII only in get_local_part

Author: cedk

Lib/email/_header_value_parser.py

@@ -1480,11 +1480,6 @@ def get_local_part(value):
             local_part.defects.append(errors.ObsoleteHeaderDefect(
                 "local-part is not a dot-atom (contains CFWS)"))
         local_part[0] = obs_local_part
-    try:
-        local_part.value.encode('ascii')
-    except UnicodeEncodeError:
-        local_part.defects.append(errors.NonASCIILocalPartDefect(
-                "local-part contains non-ASCII characters)"))
     return local_part, value
 
 def get_obs_local_part(value):

Lib/email/errors.py

@@ -104,10 +104,5 @@ def __str__(self):
 class ObsoleteHeaderDefect(HeaderDefect):
     """Header uses syntax declared obsolete by RFC 5322"""
 
-class NonASCIILocalPartDefect(HeaderDefect):
-    """local_part contains non-ASCII characters"""
-    # This defect only occurs during unicode parsing, not when
-    # parsing messages decoded from binary.
-
 class InvalidDateDefect(HeaderDefect):
     """Header has unparsable or invalid date"""

Lib/test/test_email/test__header_value_parser.py

@@ -1214,14 +1214,14 @@ def test_get_local_part_valid_and_invalid_qp_in_atom_list(self):
             '@example.com')
         self.assertEqual(local_part.local_part, r'\example\\ example')
 
-    def test_get_local_part_unicode_defect(self):
+    def test_get_local_part_unicode(self):
         # Currently this only happens when parsing unicode, not when parsing
         # stuff that was originally binary.
         local_part = self._test_get_x(parser.get_local_part,
             'exámple@example.com',
             'exámple',
             'exámple',
-            [errors.NonASCIILocalPartDefect],
+            [],
             '@example.com')
         self.assertEqual(local_part.local_part, 'exámple')