[Python-Dev] Bytes, Strings, Encoding

[Josiah Carlson]

On Wed, Jul 1, 2009 at 6:48 PM, Benjamin Peterson<benjamin at python.org> wrote:
> 2009/7/1 Eric Pruitt <eric.pruitt at gmail.com>:
>> Hello,
>>
>> I am working on the subprocess.Popen module for Python 2.7 and am now moving
>> my changes over to Python 3.1 however I am having trouble with the whole
>> byte situation and I can't quite seem to understand how to go back and forth
>> between bytes and strings. I am also looking for the Python 3k equivalent
>> for the Python 2.X built-in buffer class.
>
> Look at the "memoryview" type as a replacement for buffer.
> io.Buffered* is not the same.

FYI, it is used slightly differently.  Rather than x = buffer(y,
offset), you use x = memoryview(y)[offset:].

>> One version of the file with my modifications can be found here  <
>> http://code.google.com/p/subprocdev/source/browse/subprocess.py?spec=svn5b570f8cbfcaae859091eb01b21b183aa5221af9&r=5b570f8cbfcaae859091eb01b21b183aa5221af9
>>>. Lines 1 - 15 are me attempting to get around certain changes between
>> Python 3.0 and Python 2.7. Further down on line 916, we have the function
>> "send" and "recv" in which I am having the most trouble with bytes and
>> strings.
>
> You translate between bytes and strings through encoding and decoding.
> Have you read https://secure.wikimedia.org/wikipedia/en/wiki/Unicode?
>
>>
>> Any help is appreciated. Feel free to comment on my blog
>> http://subdev.blogspot.com/ or reply to the last.
>
> Have you talked with your mentor about these things?
>
>
> --
> Regards,
> Benjamin
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