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:mod:`quopri` --- Encode and decode MIME quoted-printable data
==============================================================
.. module:: quopri
:synopsis: Encode and decode files using the MIME quoted-printable encoding.
.. index::
pair: quoted-printable; encoding
single: MIME; quoted-printable encoding
This module performs quoted-printable transport encoding and decoding, as
defined in :rfc:`1521`: "MIME (Multipurpose Internet Mail Extensions) Part One:
Mechanisms for Specifying and Describing the Format of Internet Message Bodies".
The quoted-printable encoding is designed for data where there are relatively
few nonprintable characters; the base64 encoding scheme available via the
:mod:`base64` module is more compact if there are many such characters, as when
sending a graphics file.
.. function:: decode(input, output[,header])
Decode the contents of the *input* file and write the resulting decoded binary
data to the *output* file. *input* and *output* must be :term:`file objects
<file object>`. *input* will be read until ``input.readline()`` returns an
empty string. If the optional argument *header* is present and true, underscore
will be decoded as space. This is used to decode "Q"-encoded headers as
described in :rfc:`1522`: "MIME (Multipurpose Internet Mail Extensions)
Part Two: Message Header Extensions for Non-ASCII Text".
.. function:: encode(input, output, quotetabs)
Encode the contents of the *input* file and write the resulting quoted-printable
data to the *output* file. *input* and *output* must be :term:`file objects
<file object>`. *input* will be read until ``input.readline()`` returns an
empty string. *quotetabs* is a flag which controls whether to encode embedded
spaces and tabs; when true it encodes such embedded whitespace, and when
false it leaves them unencoded. Note that spaces and tabs appearing at the
end of lines are always encoded, as per :rfc:`1521`.
.. function:: decodestring(s[,header])
Like :func:`decode`, except that it accepts a source string and returns the
corresponding decoded string.
.. function:: encodestring(s[, quotetabs])
Like :func:`encode`, except that it accepts a source string and returns the
corresponding encoded string. *quotetabs* is optional (defaulting to 0), and is
passed straight through to :func:`encode`.
.. seealso::
Module :mod:`base64`
Encode and decode MIME base64 data
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