__init__(): Don't attach the subparts if its an empty tuple. If the
boundary was given in the arguments, call set_boundary().
diff --git a/Lib/email/MIMEMultipart.py b/Lib/email/MIMEMultipart.py
index 53b0af9..001c8a8 100644
--- a/Lib/email/MIMEMultipart.py
+++ b/Lib/email/MIMEMultipart.py
@@ -30,5 +30,8 @@
Additional parameters for the Content-Type: header are taken from the
keyword arguments (or passed into the _params argument).
"""
- MIMEBase.MIMEBase.__init__(self, 'multipart', _subtype, **params)
- self.attach(*list(_subparts))
+ MIMEBase.MIMEBase.__init__(self, 'multipart', _subtype, **_params)
+ if _subparts:
+ self.attach(*list(_subparts))
+ if boundary:
+ self.set_boundary(boundary)