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b'dGVzdA==\n'.decode('base64') raise exception #55016

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yicodeplayer mannequin opened this issue Jan 2, 2011 · 7 comments
Closed

b'dGVzdA==\n'.decode('base64') raise exception #55016

yicodeplayer mannequin opened this issue Jan 2, 2011 · 7 comments
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release-blocker topic-unicode type-bug An unexpected behavior, bug, or error

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@yicodeplayer
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Mannequin

yicodeplayer mannequin commented Jan 2, 2011

BPO 10807
Nosy @birkenfeld, @abalkin, @vstinner
Files
  • issue10807.patch
    		•

    Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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    GitHub fields:

    assignee = None
closed_at = <Date 2011-01-02.19:55:50.517>
created_at = <Date 2011-01-02.18:22:43.075>
labels = ['type-bug', 'expert-unicode', 'release-blocker']
title = "`b'dGVzdA==\\n'.decode('base64')` raise exception"
updated_at = <Date 2011-01-02.19:55:50.516>
user = 'https://bugs.python.org/yicodeplayer'

    bugs.python.org fields:

    activity = <Date 2011-01-02.19:55:50.516>
actor = 'vstinner'
assignee = 'none'
closed = True
closed_date = <Date 2011-01-02.19:55:50.517>
closer = 'vstinner'
components = ['Unicode']
creation = <Date 2011-01-02.18:22:43.075>
creator = 'yi.codeplayer'
dependencies = []
files = ['20225']
hgrepos = []
issue_num = 10807
keywords = ['patch']
message_count = 7.0
messages = ['125068', '125072', '125074', '125075', '125076', '125077', '125084']
nosy_count = 4.0
nosy_names = ['georg.brandl', 'belopolsky', 'vstinner', 'yi.codeplayer']
pr_nums = []
priority = 'release blocker'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue10807'
versions = ['Python 3.2']
    @yicodeplayer
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    Mannequin Author

    yicodeplayer mannequin commented Jan 2, 2011 

    >>> b'dGVzdA==\n'.decode('base64')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "../Lib/encodings/base64_codec.py", line 20, in base64_decode
    return (base64.decodebytes(input), len(input))
  File "../Lib/base64.py", line 359, in decodebytes
    raise TypeError("expected bytes, not %s" % s.__class__.__name__)
TypeError: expected bytes, not memoryview

    @yicodeplayer yicodeplayer mannequin added topic-unicode type-bug An unexpected behavior, bug, or error labels Jan 2, 2011
    @vstinner
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    vstinner commented Jan 2, 2011

    base64, bz2, hex, quopri, rot13, uu and zlib codecs (reintroduced recently by r86934, issue bpo-7475) cannot be used by str.encode/bytes.decode, but with .transform() and .untransform() methods of bytes and str objects. But these methods were removed by r87176.

    The last solution to use base64 codec is:

    >>> import codecs
>>> codecs.lookup('base64').decode(b'YWJj\n')[0]
b'abc'
>>> codecs.lookup('base64').encode(b'YWJj\n')[0]
b'abc'

    Or simply use directly the base64 module:

    >>> import base64
>>> base64.decodebytes(b'YWJj\n')
b'abc'
>>> base64.encodebytes(b'abc')
b'YWJj\n'

    base64, bz2, hex, quopri, rot13, uu and zlib codecs should be removed from encodings.aliases (because they introduced a confusion for Python 2 users), or removed completly (because it's easier to use directly the related module, eg. base64 or zlib).

    @vstinner
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    vstinner commented Jan 2, 2011

    bpo-10807.patch just disables hex, base64, ... codecs in aliases (so it's still possible to use they through codecs.lookup()).

    @birkenfeld
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    That does not look like the right patch...

    @vstinner
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    vstinner commented Jan 2, 2011

    Ah yes :-)

    @birkenfeld
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    Looks good, please commit.

    @vstinner
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    vstinner commented Jan 2, 2011

    Looks good, please commit.

    Ok, done: r87642

    @vstinner vstinner closed this as completed Jan 2, 2011
    @ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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