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#25495: Clarify b2a_base64 documentation vis 57 bytes.

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R David Murray 2015-12-13 18:04:14 -05:00
parent 64fa45af5a
commit b75adccd0a
1 changed files with 5 additions and 3 deletions
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Doc/library/binascii.rst
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@ -45,8 +45,10 @@ The :mod:`binascii` module defines the following functions:
.. function:: b2a_base64(data)
Convert binary data to a line of ASCII characters in base64 coding. The return
value is the converted line, including a newline char. The length of *data*
should be at most 57 to adhere to the base64 standard.
value is the converted line, including a newline char. The newline is
added because the original use case for this function was to feed it a
series of 57 byte input lines to get output lines that conform to the
MIME-base64 standard. Otherwise the output conforms to :rfc:`3548`.
.. function:: a2b_qp(string[, header])
@ -165,7 +167,7 @@ The :mod:`binascii` module defines the following functions:
.. seealso::
Module :mod:`base64`
Support for base64 encoding used in MIME email messages.
Support for RFC compliant base64-style encoding in base 16, 32, and 64.
Module :mod:`binhex`
Support for the binhex format used on the Macintosh.