[Python-checkins] cpython: #11558: Better message if attach called on non-multipart.

[r.david.murray]

http://hg.python.org/cpython/rev/302c8fdb17e3
changeset:   89490:302c8fdb17e3
user:        R David Murray <rdmurray at bitdance.com>
date:        Thu Mar 06 11:44:17 2014 -0500
summary:
  #11558: Better message if attach called on non-multipart.

Original patch by Varun Sharma.

files:
  Lib/email/message.py              |  6 +++++-
  Lib/test/test_email/test_email.py |  8 ++++++++
  Misc/ACKS                         |  1 +
  Misc/NEWS                         |  4 ++++
  4 files changed, 18 insertions(+), 1 deletions(-)


diff --git a/Lib/email/message.py b/Lib/email/message.py
--- a/Lib/email/message.py
+++ b/Lib/email/message.py
@@ -203,7 +203,11 @@
         if self._payload is None:
             self._payload = [payload]
         else:
-            self._payload.append(payload)
+            try:
+                self._payload.append(payload)
+            except AttributeError:
+                raise TypeError("Attach is not valid on a message with a"
+                                " non-multipart payload")
 
     def get_payload(self, i=None, decode=False):
         """Return a reference to the payload.
diff --git a/Lib/test/test_email/test_email.py b/Lib/test/test_email/test_email.py
--- a/Lib/test/test_email/test_email.py
+++ b/Lib/test/test_email/test_email.py
@@ -124,6 +124,14 @@
         msg.set_payload([])
         self.assertEqual(msg.get_payload(), [])
 
+    def test_attach_when_payload_is_string(self):
+        msg = Message()
+        msg['Content-Type'] = 'multipart/mixed'
+        msg.set_payload('string payload')
+        sub_msg = MIMEMessage(Message())
+        self.assertRaisesRegex(TypeError, "[Aa]ttach.*non-multipart",
+                               msg.attach, sub_msg)
+
     def test_get_charsets(self):
         eq = self.assertEqual
 
diff --git a/Misc/ACKS b/Misc/ACKS
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -1188,6 +1188,7 @@
 Ha Shao
 Mark Shannon
 Richard Shapiro
+Varun Sharma
 Vlad Shcherbina
 Justin Sheehy
 Charlie Shepherd
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -20,6 +20,10 @@
 Library
 -------
 
+- Issue #11558: ``email.message.Message.attach`` now returns a more
+  useful error message if ``attach`` is called on a message for which
+  ``is_multipart`` is False.
+
 - Issue #20283: RE pattern methods now accept the string keyword parameters
   as documented.  The pattern and source keyword parameters are left as
   deprecated aliases.

-- 
Repository URL: http://hg.python.org/cpython