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<H1>[pycrypto] Once again: Python3 with PyCrypto</H1>
<B>Dwayne C. Litzenberger</B>
<A HREF="mailto:pycrypto%40lists.dlitz.net?Subject=%5Bpycrypto%5D%20Once%20again%3A%20Python3%20with%20PyCrypto&In-Reply-To=4D1539CB.6000600%40gmx.li"
TITLE="[pycrypto] Once again: Python3 with PyCrypto">dlitz at dlitz.net
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<I>Sat Dec 25 10:36:27 CST 2010</I>
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<PRE>I'm on vacation, so I won't be able to look at this until early January, but off the top of my head... does .encode() work in Python 2.1?
"Thorsten Behrens" <<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">sbehrens at gmx.li</A>> wrote:
><i>Still crashing, just not on importing winrandom any more. I found the
</I>><i>typo there. More errors remain, clearly.
</I>><i>
</I>><i>I have a question regarding the str/bytes situation in Python 3. Take
</I>><i>this example from Counter.py:
</I>><i>
</I>><i> if sys.version_info[0] is 2:
</I>><i> if little_endian:
</I>><i> return _counter._newLE(str(prefix), str(suffix), initval,
</I>><i>allow_wraparound=allow_wraparound, disable_shortcut=disable_shortcut)
</I>><i> else:
</I>><i> return _counter._newBE(str(prefix), str(suffix), initval,
</I>><i>allow_wraparound=allow_wraparound, disable_shortcut=disable_shortcut)
</I>><i> else:
</I>><i> if little_endian:
</I>><i> return _counter._newLE(prefix.encode(), suffix.encode(),
</I>><i>initval.encode(), allow_wraparound=allow_wraparound,
</I>><i>disable_shortcut=disable_shortcut)
</I>><i> else:
</I>><i> return _counter._newBE(prefix.encode(), suffix.encode(),
</I>><i>initval.encode(), allow_wraparound=allow_wraparound,
</I>><i>disable_shortcut=disable_shortcut)
</I>><i>
</I>><i>Not having had that much exposure to this code, my question is: Would
</I>><i>it
</I>><i>be safe to just use .encode() throughout, without the check for Python
</I>><i>version? From all I can tell, it'll work as desired - but there may be
</I>><i>a
</I>><i>corner case I haven't considered. Essentially, can I collapse the above
</I>><i>
</I>><i>again to:
</I>><i>
</I>><i> if little_endian:
</I>><i> return _counter._newLE(prefix.encode(), suffix.encode(),
</I>><i>initval.encode(), allow_wraparound=allow_wraparound,
</I>><i>disable_shortcut=disable_shortcut)
</I>><i> else:
</I>><i> return _counter._newBE(prefix.encode(), suffix.encode(),
</I>><i>initval.encode(), allow_wraparound=allow_wraparound,
</I>><i>disable_shortcut=disable_shortcut)
</I>><i>
</I>><i>for all versions of Python, 2.x and 3.x.
</I>><i>
</I>><i>Dwayne, can you shed some light?
</I>><i>
</I>><i>Thorsten
</I>><i>
</I>><i>_______________________________________________
</I>><i>pycrypto mailing list
</I>><i><A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">pycrypto at lists.dlitz.net</A>
</I>><i><A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto</A>
</I>
--
Sent from my Android phone with K-9 Mail. Please excuse my brevity.
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