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1. vadmium commented on Aug 19, 2016

   

   vadmium

   on Aug 19, 2016

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   This is split off a large patch I posted at bpo-20132. My new patch here fixes the following two flaws.

   1. There is special code in the bz2 decoder that returns an empty text str object at EOF, even though bz2-codec is a bytes-to-bytes codec:
   >>> import codecs
   >>> decoder = codecs.getincrementaldecoder("bz2")()
   >>> decoder.decode(codecs.encode(b"data", "bz2"))
   b'data'
   >>> decoder.decode(b"", final=True)  # Should return bytes object
   ''
   
   2. The base64 decoder does not handle partial sets of four codes, because it treats each input chunk as a stand-alone base64 encoding:
   >>> tuple(codecs.iterdecode((b"AA", b"AA\r\n"), "base64"))
   Traceback (most recent call last):
     File "<stdin>", line 1, in <module>
     File "/usr/lib/python3.5/codecs.py", line 1039, in iterdecode
       output = decoder.decode(input)
     File "/usr/lib/python3.5/encodings/base64_codec.py", line 35, in decode
       return base64.decodebytes(input)
     File "/usr/lib/python3.5/base64.py", line 554, in decodebytes
       return binascii.a2b_base64(s)
   binascii.Error: Incorrect padding
2. vadmium

   added

   stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

   type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

   on Aug 19, 2016
3. ezio-melotti

   transferred this issue fromon Apr 10, 2022
4. serhiy-storchaka

   added this to Compression issues 🗜and Codecs and encodings issueson May 21, 2022