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\declaremodule{standard}{email.mime}\declaremodule{standard}{email.mime.base}\declaremodule{standard}{email.mime.nonmultipart}\declaremodule{standard}{email.mime.multipart}\declaremodule{standard}{email.mime.audio}\declaremodule{standard}{email.mime.image}\declaremodule{standard}{email.mime.message}\declaremodule{standard}{email.mime.text}Ordinarily, you get a message object structure by passing a file orsome text to a parser, which parses the text and returns the rootmessage object.  However you can also build a complete messagestructure from scratch, or even individual \class{Message} objects byhand.  In fact, you can also take an existing structure and add new\class{Message} objects, move them around, etc.  This makes a veryconvenient interface for slicing-and-dicing MIME messages. You can create a new object structure by creating \class{Message} instances,adding attachments and all the appropriate headers manually.  For MIMEmessages though, the \module{email} package provides some convenientsubclasses to make things easier. Here are the classes: \begin{classdesc}{MIMEBase}{_maintype, _subtype, **_params}Module: \module{email.mime.base} This is the base class for all the MIME-specific subclasses of\class{Message}.  Ordinarily you won't create instances specificallyof \class{MIMEBase}, although you could.  \class{MIMEBase} is providedprimarily as a convenient base class for more specific MIME-awaresubclasses. \var{_maintype} is the \mailheader{Content-Type} major type(e.g. \mimetype{text} or \mimetype{image}), and \var{_subtype} is the\mailheader{Content-Type} minor type (e.g. \mimetype{plain} or \mimetype{gif}).  \var{_params} is a parameterkey/value dictionary and is passed directly to\method{Message.add_header()}. The \class{MIMEBase} class always adds a \mailheader{Content-Type} header(based on \var{_maintype}, \var{_subtype}, and \var{_params}), and a\mailheader{MIME-Version} header (always set to \code{1.0}).\end{classdesc} \begin{classdesc}{MIMENonMultipart}{}Module: \module{email.mime.nonmultipart} A subclass of \class{MIMEBase}, this is an intermediate base class forMIME messages that are not \mimetype{multipart}.  The primary purposeof this class is to prevent the use of the \method{attach()} method,which only makes sense for \mimetype{multipart} messages.  If\method{attach()} is called, a \exception{MultipartConversionError}exception is raised. \versionadded{2.2.2}\end{classdesc} \begin{classdesc}{MIMEMultipart}{\optional{subtype\optional{,    boundary\optional{, _subparts\optional{, _params}}}}}Module: \module{email.mime.multipart} A subclass of \class{MIMEBase}, this is an intermediate base class forMIME messages that are \mimetype{multipart}.  Optional \var{_subtype}defaults to \mimetype{mixed}, but can be used to specify the subtypeof the message.  A \mailheader{Content-Type} header of\mimetype{multipart/}\var{_subtype} will be added to the messageobject.  A \mailheader{MIME-Version} header will also be added. Optional \var{boundary} is the multipart boundary string.  When\code{None} (the default), the boundary is calculated when needed. \var{_subparts} is a sequence of initial subparts for the payload.  Itmust be possible to convert this sequence to a list.  You can alwaysattach new subparts to the message by using the\method{Message.attach()} method. Additional parameters for the \mailheader{Content-Type} header aretaken from the keyword arguments, or passed into the \var{_params}argument, which is a keyword dictionary. \versionadded{2.2.2}\end{classdesc} \begin{classdesc}{MIMEApplication}{_data\optional{, _subtype\optional{,    _encoder\optional{, **_params}}}}Module: \module{email.mime.application} A subclass of \class{MIMENonMultipart}, the \class{MIMEApplication} class isused to represent MIME message objects of major type \mimetype{application}.\var{_data} is a string containing the raw byte data.  Optional \var{_subtype}specifies the MIME subtype and defaults to \mimetype{octet-stream}.   Optional \var{_encoder} is a callable (i.e. function) which willperform the actual encoding of the data for transport.  Thiscallable takes one argument, which is the \class{MIMEApplication} instance.It should use \method{get_payload()} and \method{set_payload()} tochange the payload to encoded form.  It should also add any\mailheader{Content-Transfer-Encoding} or other headers to the messageobject as necessary.  The default encoding is base64.  See the\refmodule{email.encoders} module for a list of the built-in encoders. \var{_params} are passed straight through to the base class constructor.\versionadded{2.5}\end{classdesc} \begin{classdesc}{MIMEAudio}{_audiodata\optional{, _subtype\optional{,    _encoder\optional{, **_params}}}}Module: \module{email.mime.audio} A subclass of \class{MIMENonMultipart}, the \class{MIMEAudio} classis used to create MIME message objects of major type \mimetype{audio}.\var{_audiodata} is a string containing the raw audio data.  If thisdata can be decoded by the standard Python module \refmodule{sndhdr},then the subtype will be automatically included in the\mailheader{Content-Type} header.  Otherwise you can explicitly specify theaudio subtype via the \var{_subtype} parameter.  If the minor type couldnot be guessed and \var{_subtype} was not given, then \exception{TypeError}is raised. Optional \var{_encoder} is a callable (i.e. function) which willperform the actual encoding of the audio data for transport.  Thiscallable takes one argument, which is the \class{MIMEAudio} instance.It should use \method{get_payload()} and \method{set_payload()} tochange the payload to encoded form.  It should also add any\mailheader{Content-Transfer-Encoding} or other headers to the messageobject as necessary.  The default encoding is base64.  See the\refmodule{email.encoders} module for a list of the built-in encoders. \var{_params} are passed straight through to the base class constructor.\end{classdesc} \begin{classdesc}{MIMEImage}{_imagedata\optional{, _subtype\optional{,    _encoder\optional{, **_params}}}}Module: \module{email.mime.image} A subclass of \class{MIMENonMultipart}, the \class{MIMEImage} class isused to create MIME message objects of major type \mimetype{image}.\var{_imagedata} is a string containing the raw image data.  If thisdata can be decoded by the standard Python module \refmodule{imghdr},then the subtype will be automatically included in the\mailheader{Content-Type} header.  Otherwise you can explicitly specify theimage subtype via the \var{_subtype} parameter.  If the minor type couldnot be guessed and \var{_subtype} was not given, then \exception{TypeError}is raised. Optional \var{_encoder} is a callable (i.e. function) which willperform the actual encoding of the image data for transport.  Thiscallable takes one argument, which is the \class{MIMEImage} instance.It should use \method{get_payload()} and \method{set_payload()} tochange the payload to encoded form.  It should also add any\mailheader{Content-Transfer-Encoding} or other headers to the messageobject as necessary.  The default encoding is base64.  See the\refmodule{email.encoders} module for a list of the built-in encoders. \var{_params} are passed straight through to the \class{MIMEBase}constructor.\end{classdesc} \begin{classdesc}{MIMEMessage}{_msg\optional{, _subtype}}Module: \module{email.mime.message} A subclass of \class{MIMENonMultipart}, the \class{MIMEMessage} classis used to create MIME objects of main type \mimetype{message}.\var{_msg} is used as the payload, and must be an instance of class\class{Message} (or a subclass thereof), otherwise a\exception{TypeError} is raised. Optional \var{_subtype} sets the subtype of the message; it defaultsto \mimetype{rfc822}.\end{classdesc} \begin{classdesc}{MIMEText}{_text\optional{, _subtype\optional{, _charset}}}Module: \module{email.mime.text} A subclass of \class{MIMENonMultipart}, the \class{MIMEText} class isused to create MIME objects of major type \mimetype{text}.\var{_text} is the string for the payload.  \var{_subtype} is theminor type and defaults to \mimetype{plain}.  \var{_charset} is thecharacter set of the text and is passed as a parameter to the\class{MIMENonMultipart} constructor; it defaults to \code{us-ascii}.  Noguessing or encoding is performed on the text data. \versionchanged[The previously deprecated \var{_encoding} argument hasbeen removed.  Encoding happens implicitly based on the \var{_charset}argument]{2.4}\end{classdesc}