On Fri, 24 Aug 2012 13:26:49 -0400 Daniel Holth <dholth@gmail.com> wrote:
While I was implementing JSON-JWS (JSON web signatures), a format which in Python 3 has to go from bytes > unicode > bytes > unicode several times in its construction, I notice I wrote a lot of bugs:
"sha256=b'abcdef1234'"
When I meant to say:
"sha256=abcdef1234"
Everything worked perfectly on Python 3 because the verifying code also generated the sha256=b'abcdef1234' as a comparison. I would have never noticed at all unless I had tried to verify the Python 3 output with Python 2.
You can use the -bb flag to raise BytesWarnings in such cases: $ python3 -bb Python 3.2.2+ (3.2:9ef20fbd340f, Oct 15 2011, 21:22:07) [GCC 4.5.2] on linux2 Type "help", "copyright", "credits" or "license" for more information.
str(b'foo') Traceback (most recent call last): File "<stdin>", line 1, in <module> BytesWarning: str() on a bytes instance "%s" % (b'foo',) Traceback (most recent call last): File "<stdin>", line 1, in <module> BytesWarning: str() on a bytes instance "{}".format(b'foo') Traceback (most recent call last): File "<stdin>", line 1, in <module> BytesWarning: str() on a bytes instance
Regards Antoine. -- Software development and contracting: http://pro.pitrou.net