ref: 5c85bf33d2a8a8bf1c542ddaffcc59a11c857aaa
dir: /sys/lib/python/email/mime/multipart.py/
# Copyright (C) 2002-2006 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org
"""Base class for MIME multipart/* type messages."""
__all__ = ['MIMEMultipart']
from email.mime.base import MIMEBase
class MIMEMultipart(MIMEBase):
    """Base class for MIME multipart/* type messages."""
    def __init__(self, _subtype='mixed', boundary=None, _subparts=None,
                 **_params):
        """Creates a multipart/* type message.
        By default, creates a multipart/mixed message, with proper
        Content-Type and MIME-Version headers.
        _subtype is the subtype of the multipart content type, defaulting to
        `mixed'.
        boundary is the multipart boundary string.  By default it is
        calculated as needed.
        _subparts is a sequence of initial subparts for the payload.  It
        must be an iterable object, such as a list.  You can always
        attach new subparts to the message by using the attach() method.
        Additional parameters for the Content-Type header are taken from the
        keyword arguments (or passed into the _params argument).
        """
        MIMEBase.__init__(self, 'multipart', _subtype, **_params)
        if _subparts:
            for p in _subparts:
                self.attach(p)
        if boundary:
            self.set_boundary(boundary)