| Python 3.6.5 Documentation > "email.mime": Creating email and MIME objects from scratch
"email.mime": Creating email and MIME objects from scratch
**********************************************************
**Source code:** Lib/email/mime/
======================================================================
This module is part of the legacy ("Compat32") email API. Its
functionality is partially replaced by the "contentmanager" in the new
API, but in certain applications these classes may still be useful,
even in non-legacy code.
Ordinarily, you get a message object structure by passing a file or
some text to a parser, which parses the text and returns the root
message object. However you can also build a complete message
structure from scratch, or even individual "Message" objects by hand.
In fact, you can also take an existing structure and add new "Message"
objects, move them around, etc. This makes a very convenient
interface for slicing-and-dicing MIME messages.
You can create a new object structure by creating "Message" instances,
adding attachments and all the appropriate headers manually. For MIME
messages though, the "email" package provides some convenient
subclasses to make things easier.
Here are the classes:
class email.mime.base.MIMEBase(_maintype, _subtype, *, policy=compat32, **_params)
Module: "email.mime.base"
This is the base class for all the MIME-specific subclasses of
"Message". Ordinarily you won’t create instances specifically of
"MIMEBase", although you could. "MIMEBase" is provided primarily
as a convenient base class for more specific MIME-aware subclasses.
*_maintype* is the *Content-Type* major type (e.g. *text* or
*image*), and *_subtype* is the *Content-Type* minor type (e.g.
*plain* or *gif*). *_params* is a parameter key/value dictionary
and is passed directly to "Message.add_header".
If *policy* is specified, (defaults to the "compat32" policy) it
will be passed to "Message".
The "MIMEBase" class always adds a *Content-Type* header (based on
*_maintype*, *_subtype*, and *_params*), and a *MIME-Version*
header (always set to "1.0").
Changed in version 3.6: Added *policy* keyword-only parameter.
class email.mime.nonmultipart.MIMENonMultipart
Module: "email.mime.nonmultipart"
A subclass of "MIMEBase", this is an intermediate base class for
MIME messages that are not *multipart*. The primary purpose of
this class is to prevent the use of the "attach()" method, which
only makes sense for *multipart* messages. If "attach()" is
called, a "MultipartConversionError" exception is raised.
class email.mime.multipart.MIMEMultipart(_subtype='mixed', boundary=None, _subparts=None, *, policy=compat32, **_params)
Module: "email.mime.multipart"
A subclass of "MIMEBase", this is an intermediate base class for
MIME messages that are *multipart*. Optional *_subtype* defaults
to *mixed*, but can be used to specify the subtype of the message.
A *Content-Type* header of *multipart/_subtype* will be added to
the message object. A *MIME-Version* header will also be added.
Optional *boundary* is the multipart boundary string. When "None"
(the default), the boundary is calculated when needed (for example,
when the message is serialized).
*_subparts* is a sequence of initial subparts for the payload. It
must be possible to convert this sequence to a list. You can
always attach new subparts to the message by using the
"Message.attach" method.
Optional *policy* argument defaults to "compat32".
Additional parameters for the *Content-Type* header are taken from
the keyword arguments, or passed into the *_params* argument, which
is a keyword dictionary.
Changed in version 3.6: Added *policy* keyword-only parameter.
class email.mime.application.MIMEApplication(_data, _subtype='octet-stream', _encoder=email.encoders.encode_base64, *, policy=compat32, **_params)
Module: "email.mime.application"
A subclass of "MIMENonMultipart", the "MIMEApplication" class is
used to represent MIME message objects of major type *application*.
*_data* is a string containing the raw byte data. Optional
*_subtype* specifies the MIME subtype and defaults to *octet-
stream*.
Optional *_encoder* is a callable (i.e. function) which will
perform the actual encoding of the data for transport. This
callable takes one argument, which is the "MIMEApplication"
instance. It should use "get_payload()" and "set_payload()" to
change the payload to encoded form. It should also add any
*Content-Transfer-Encoding* or other headers to the message object
as necessary. The default encoding is base64. See the
"email.encoders" module for a list of the built-in encoders.
Optional *policy* argument defaults to "compat32".
*_params* are passed straight through to the base class
constructor.
Changed in version 3.6: Added *policy* keyword-only parameter.
class email.mime.audio.MIMEAudio(_audiodata, _subtype=None, _encoder=email.encoders.encode_base64, *, policy=compat32, **_params)
Module: "email.mime.audio"
A subclass of "MIMENonMultipart", the "MIMEAudio" class is used to
create MIME message objects of major type *audio*. *_audiodata* is
a string containing the raw audio data. If this data can be
decoded by the standard Python module "sndhdr", then the subtype
will be automatically included in the *Content-Type* header.
Otherwise you can explicitly specify the audio subtype via the
*_subtype* argument. If the minor type could not be guessed and
*_subtype* was not given, then "TypeError" is raised.
Optional *_encoder* is a callable (i.e. function) which will
perform the actual encoding of the audio data for transport. This
callable takes one argument, which is the "MIMEAudio" instance. It
should use "get_payload()" and "set_payload()" to change the
payload to encoded form. It should also add any *Content-Transfer-
Encoding* or other headers to the message object as necessary. The
default encoding is base64. See the "email.encoders" module for a
list of the built-in encoders.
Optional *policy* argument defaults to "compat32".
*_params* are passed straight through to the base class
constructor.
Changed in version 3.6: Added *policy* keyword-only parameter.
class email.mime.image.MIMEImage(_imagedata, _subtype=None, _encoder=email.encoders.encode_base64, *, policy=compat32, **_params)
Module: "email.mime.image"
A subclass of "MIMENonMultipart", the "MIMEImage" class is used to
create MIME message objects of major type *image*. *_imagedata* is
a string containing the raw image data. If this data can be
decoded by the standard Python module "imghdr", then the subtype
will be automatically included in the *Content-Type* header.
Otherwise you can explicitly specify the image subtype via the
*_subtype* argument. If the minor type could not be guessed and
*_subtype* was not given, then "TypeError" is raised.
Optional *_encoder* is a callable (i.e. function) which will
perform the actual encoding of the image data for transport. This
callable takes one argument, which is the "MIMEImage" instance. It
should use "get_payload()" and "set_payload()" to change the
payload to encoded form. It should also add any *Content-Transfer-
Encoding* or other headers to the message object as necessary. The
default encoding is base64. See the "email.encoders" module for a
list of the built-in encoders.
Optional *policy* argument defaults to "compat32".
*_params* are passed straight through to the "MIMEBase"
constructor.
Changed in version 3.6: Added *policy* keyword-only parameter.
class email.mime.message.MIMEMessage(_msg, _subtype='rfc822', *, policy=compat32)
Module: "email.mime.message"
A subclass of "MIMENonMultipart", the "MIMEMessage" class is used
to create MIME objects of main type *message*. *_msg* is used as
the payload, and must be an instance of class "Message" (or a
subclass thereof), otherwise a "TypeError" is raised.
Optional *_subtype* sets the subtype of the message; it defaults to
*rfc822*.
Optional *policy* argument defaults to "compat32".
Changed in version 3.6: Added *policy* keyword-only parameter.
class email.mime.text.MIMEText(_text, _subtype='plain', _charset=None, *, policy=compat32)
Module: "email.mime.text"
A subclass of "MIMENonMultipart", the "MIMEText" class is used to
create MIME objects of major type *text*. *_text* is the string for
the payload. *_subtype* is the minor type and defaults to *plain*.
*_charset* is the character set of the text and is passed as an
argument to the "MIMENonMultipart" constructor; it defaults to "us-
ascii" if the string contains only "ascii" code points, and "utf-8"
otherwise. The *_charset* parameter accepts either a string or a
"Charset" instance.
Unless the *_charset* argument is explicitly set to "None", the
MIMEText object created will have both a *Content-Type* header with
a "charset" parameter, and a *Content-Transfer-Encoding* header.
This means that a subsequent "set_payload" call will not result in
an encoded payload, even if a charset is passed in the
"set_payload" command. You can “reset” this behavior by deleting
the "Content-Transfer-Encoding" header, after which a "set_payload"
call will automatically encode the new payload (and add a new
*Content-Transfer-Encoding* header).
Optional *policy* argument defaults to "compat32".
Changed in version 3.5: *_charset* also accepts "Charset"
instances.
Changed in version 3.6: Added *policy* keyword-only parameter.
| 
