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output charset when the method Charset.convert() is called. The default
is to output in the same character set as the input.
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information on how to use that character set in an email in an
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Certain character sets must be encoded with quoted-printable or base64
when used in email headers or bodies. Certain character sets must be
converted outright, and are not allowed in email. Instances of this
module expose the following information about a character set:
input_charset: The initial character set specified. Common aliases
are converted to their `official' email names (e.g. latin_1
is converted to iso-8859-1). Defaults to 7-bit us-ascii.
header_encoding: If the character set must be encoded before it can be
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body_encoding: Same as header_encoding, but describes the encoding for the
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charset output will be converted to. Otherwise, it will
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necessary, this attribute will be None.
output_codec: The name of the Python codec used to convert Unicode
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