Use absolute import paths for intrapackage imports.

Use MIMENonMultipart as the base class so that you can't attach() to
these non-multipart message types.

Lib/email/MIMEAudio.py

@@ -6,9 +6,9 @@
 import sndhdr
 from cStringIO import StringIO
 
-import MIMEBase
-import Errors
-import Encoders
+from email import Errors
+from email import Encoders
+from email.MIMENonMultipart import MIMENonMultipart
 
 
 
@@ -37,7 +37,7 @@ def _whatsnd(data):
 
 
 
-class MIMEAudio(MIMEBase.MIMEBase):
+class MIMEAudio(MIMENonMultipart):
     """Class for generating audio/* MIME documents."""
 
     def __init__(self, _audiodata, _subtype=None,
@@ -66,6 +66,6 @@ class MIMEAudio(MIMEBase.MIMEBase):
             _subtype = _whatsnd(_audiodata)
         if _subtype is None:
             raise TypeError, 'Could not find audio MIME subtype'
-        MIMEBase.MIMEBase.__init__(self, 'audio', _subtype, **_params)
+        MIMENonMultipart.__init__(self, 'audio', _subtype, **_params)
         self.set_payload(_audiodata)
         _encoder(self)

Lib/email/MIMEBase.py

@@ -4,7 +4,7 @@
 """Base class for MIME specializations.
 """
 
-import Message
+from email import Message
 
 
 

Lib/email/MIMEImage.py

@@ -6,14 +6,13 @@
 
 import imghdr
 
-# Intrapackage imports
-import MIMEBase
-import Errors
-import Encoders
+from email import Errors
+from email import Encoders
+from email.MIMENonMultipart import MIMENonMultipart
 
 
 
-class MIMEImage(MIMEBase.MIMEBase):
+class MIMEImage(MIMENonMultipart):
     """Class for generating image/* type MIME documents."""
 
     def __init__(self, _imagedata, _subtype=None,
@@ -41,6 +40,6 @@ class MIMEImage(MIMEBase.MIMEBase):
             _subtype = imghdr.what(None, _imagedata)
         if _subtype is None:
             raise TypeError, 'Could not guess image MIME subtype'
-        MIMEBase.MIMEBase.__init__(self, 'image', _subtype, **_params)
+        MIMENonMultipart.__init__(self, 'image', _subtype, **_params)
         self.set_payload(_imagedata)
         _encoder(self)

Lib/email/MIMEMessage.py

@@ -4,12 +4,12 @@
 """Class representing message/* MIME documents.
 """
 
-import Message
-import MIMEBase
+from email import Message
+from email.MIMENonMultipart import MIMENonMultipart
 
 
 
-class MIMEMessage(MIMEBase.MIMEBase):
+class MIMEMessage(MIMENonMultipart):
     """Class representing message/* MIME documents."""
 
     def __init__(self, _msg, _subtype='rfc822'):
@@ -22,7 +22,9 @@ class MIMEMessage(MIMEBase.MIMEBase):
         default is "rfc822" (this is defined by the MIME standard, even though
         the term "rfc822" is technically outdated by RFC 2822).
         """
-        MIMEBase.MIMEBase.__init__(self, 'message', _subtype)
+        MIMENonMultipart.__init__(self, 'message', _subtype)
         if not isinstance(_msg, Message.Message):
             raise TypeError, 'Argument is not an instance of Message'
-        self.set_payload(_msg)
+        # It's convenient to use this base class method.  We need to do it
+        # this way or we'll get an exception
+        Message.Message.attach(self, _msg)

Lib/email/MIMEText.py

@@ -5,12 +5,12 @@
 """
 
 import warnings
-import MIMEBase
-from Encoders import encode_7or8bit
+from email.MIMENonMultipart import MIMENonMultipart
+from email.Encoders import encode_7or8bit
 
 
 
-class MIMEText(MIMEBase.MIMEBase):
+class MIMEText(MIMENonMultipart):
     """Class for generating text/* type MIME documents."""
 
     def __init__(self, _text, _subtype='plain', _charset='us-ascii',
@@ -33,7 +33,7 @@ class MIMEText(MIMEBase.MIMEBase):
         override any header settings indicated by _charset.  This is probably
         not what you want.
         """
-        MIMEBase.MIMEBase.__init__(self, 'text', _subtype,
+        MIMENonMultipart.__init__(self, 'text', _subtype,
                                   **{'charset': _charset})
         if _text and _text[-1] <> '\n':
             _text += '\n'