Comments (6)
Hi Sandro,
Thanks for reporting this, this is strange. All I can think of to check off
the top of my head is: what is the environment variable LANG set to inside of
your chroot environment?
Original comment by [email protected]
on 22 Feb 2013 at 2:50
from prettytable.
# echo $LANG
C
Original comment by sandro.tosi
on 22 Feb 2013 at 6:06
from prettytable.
I think that is the problem. I just tried running the test suite with LANG=C
and I get the same error you do. Setting LANG back to en_US.UTF-8 gets it to
work like normal. I guess the reason you can run it fine outside the chroot is
that in your normal environment you too have LANG set to something with UTF-8
in it.
Line 566, print(self.x), calls the PrettyTable object's __str__ method. When
running under Python 3.x, this returns a unicode string (i.e. the string is not
encoded). I don't really understand in detail how the Python print statement
interacts with your console or terminal emulator to get that unicode string,
but I suppose at some point it needs to be encoded to get passed from one place
to another, and the value of LANG influences how that coding is done. When
LANG=C, something somewhere attempts to encode the string in ASCII, which fails
when there is, e.g. Japanese text in the string, as in this case. If LANG is
set to something like en_US.UTF-8 (or I presume any locale ending with .UTF-8)
then the attempted encoding is into UTF-8, which of course works just fine.
Note that in Python 2, __str__ *can* return a unicode string, but the more
normal behaviour is for it to return an encoded byte string (while
__unicode__() must return a unicode object). In PrettyTable, __str__ under
Python 2 returns an encoded string, and by default it is encoded using UTF-8
(unless the user overrides this). So this very same test works just fine under
Python 2 even if LANG=C.
__str__ is certainly expected to return unicode in Python 3, so it seems to me
that Python 3 applications are basically fundamentally incompatible with
LANG=C, unless they are written specifically to overcome this. In principle I
suppose it would be possible to check the value of LANG at the time of calling
__str__ and return an encoded string if LANG=C, but I am not sure if Python 3
will object to __str__ returning a byte object, and I'm also not sure if that
would be considered bad practice or not.
At any rate, I don't *think* this is a bug in PrettyTable per se. The problem
is that your chroot environment has what is probably by now considered an
obsolete setting of LANG. I don't remember exactly how the Debian installer
goes with locales, but I suspect it probably has a UTF-8 option selected by
default? I don't think that this issue is likely to impact very many people
using the package, because most of them should have a more unicode-friendly
LANG setting in their day-to-day work environments.
Original comment by [email protected]
on 22 Feb 2013 at 6:24
from prettytable.
Sandro, were you able to either
(i) get your chroot packaging environment using a non-C locale, or
(ii) verify that the package works correctly anyway when installed in a
"proper" Debian system as set up by the installer?
Original comment by [email protected]
on 19 Mar 2013 at 2:24
from prettytable.
Hi Luke,
it was indeed the lack of a UTF-8 charset in the building chroot; once I
installed & instructed tests to use it, they pass correctly - hence I was just
able to upload 0.7.2 to Debian!
Original comment by sandro.tosi
on 7 Apr 2013 at 9:55
from prettytable.
Hi Sandro,
Wonderful, thanks for letting me know that you got this sorted. I'll close the
issue now.
Original comment by [email protected]
on 7 Apr 2013 at 10:50
- Changed state: Fixed
from prettytable.
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