code: def __init__(self, _maintype, _subtype, *, policy=None, **_params):
      """This constructor adds a Content-Type: and a MIME-Version: header.
  
      The Content-Type: header is taken from the _maintype and _subtype
      arguments.  Additional parameters for this header are taken from the
      keyword arguments.
      """
      if policy is None:
          policy = email.policy.compat32
      message.Message.__init__(self, policy=policy)
      ctype = "%s/%s" % (_maintype, _subtype)
      self.add_header("Content-Type", ctype, **_params)
      self["MIME-Version"] = "1.0"
  
imports: import email.policy
  from email import message
label_desc: Use image node_id 1 to create a new MIMEBase object from inherited base classes: message with example: obj = MIMEBase(_maintype, _subtype)