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gh-90717: Update the documentation for the altchars paremeter in base64 library (GH-94187)

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Sam Ezeh 2022-11-29 16:21:01 +00:00 committed by GitHub
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1 changed files with 11 additions and 8 deletions
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Doc/library/base64.rst
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@ -53,11 +53,13 @@ The modern interface provides:
Encode the :term:`bytes-like object` *s* using Base64 and return the encoded
:class:`bytes`.
Optional *altchars* must be a :term:`bytes-like object` of at least
length 2 (additional characters are ignored) which specifies an alternative
alphabet for the ``+`` and ``/`` characters. This allows an application to e.g.
generate URL or filesystem safe Base64 strings. The default is ``None``, for
which the standard Base64 alphabet is used.
Optional *altchars* must be a :term:`bytes-like object` of length 2 which
specifies an alternative alphabet for the ``+`` and ``/`` characters.
This allows an application to e.g. generate URL or filesystem safe Base64
strings. The default is ``None``, for which the standard Base64 alphabet is used.
May assert or raise a a :exc:`ValueError` if the length of *altchars* is not 2. Raises a
:exc:`TypeError` if *altchars* is not a :term:`bytes-like object`.
.. function:: b64decode(s, altchars=None, validate=False)
@ -65,9 +67,9 @@ The modern interface provides:
Decode the Base64 encoded :term:`bytes-like object` or ASCII string
*s* and return the decoded :class:`bytes`.
Optional *altchars* must be a :term:`bytes-like object` or ASCII string of
at least length 2 (additional characters are ignored) which specifies the
alternative alphabet used instead of the ``+`` and ``/`` characters.
Optional *altchars* must be a :term:`bytes-like object` or ASCII string
of length 2 which specifies the alternative alphabet used instead of the
``+`` and ``/`` characters.
A :exc:`binascii.Error` exception is raised
if *s* is incorrectly padded.
@ -80,6 +82,7 @@ The modern interface provides:
For more information about the strict base64 check, see :func:`binascii.a2b_base64`
May assert or raise a :exc:`ValueError` if the length of *altchars* is not 2.
.. function:: standard_b64encode(s)