I'm getting a unicodeescape error importing matplotlib in the IPython notebook interface. The traceback is shown below. Annotate states that https://github.com/matplotlib/matplotlib/commit/bd71341ff645e1e4eb7470a5d2a5541e73bf6d5f introduced the changes to __init__.py which appears to have instigated the error. I was able to import matplotlib 1.3.1 in the IPython notebook. This traceback is appearing for me in both IPython 1.0.0 and 1.1.0. I'm on win32 32-bit. I would appreciate feedback on whether this is a real regression or something on my system. import matplotlib --------------------------------------------------------------------------- UnicodeDecodeError Traceback (most recent call last) <ipython-input-1-82be63b7783c> in <module>() ----> 1 import matplotlib C:\Python27\lib\site-packages\matplotlib\__init__.py in <module>() --> 240 class Verbose: C:\Python27\lib\site-packages\matplotlib\__init__.py in Verbose() --> 252 for arg in map(six.u, sys.argv[1:]): C:\Python27\lib\site-packages\six.pyc in u(s) --> 468 return unicode(s, "unicode_escape") UnicodeDecodeError: 'unicodeescape' codec can't decode bytes in position 2-3: truncated \UXXXXXXXX escape Thanks, Joel
On 6 December 2013 04:55, Joel B. Mohler <jm...@ga...> wrote: > C:\Python27\lib\site-packages\matplotlib\__init__.py in Verbose() > --> 252 for arg in map(six.u, sys.argv[1:]): > C:\Python27\lib\site-packages\six.pyc in u(s) > --> 468 return unicode(s, "unicode_escape") > UnicodeDecodeError: 'unicodeescape' codec can't decode bytes in position > 2-3: truncated \UXXXXXXXX escape > I'll bet that one of the arguments starts with C:\Users. It looks like six.u() can't be applied to arbitrary input (it's intended for literals). Thomas
On 12/6/2013 12:45 PM, Thomas Kluyver wrote: > On 6 December 2013 04:55, Joel B. Mohler <jm...@ga... > <mailto:jm...@ga...>> wrote: > > C:\Python27\lib\site-packages\matplotlib\__init__.py in Verbose() > --> 252 for arg in map(six.u, sys.argv[1:]): > C:\Python27\lib\site-packages\six.pyc in u(s) > --> 468 return unicode(s, "unicode_escape") > UnicodeDecodeError: 'unicodeescape' codec can't decode bytes in > position > 2-3: truncated \UXXXXXXXX escape > > > I'll bet that one of the arguments starts with C:\Users. It looks like > six.u() can't be applied to arbitrary input (it's intended for literals). Indeed, I suspect you are exactly right. After pondering the transcript below, I think it is bad idea to apply six.u to any sort of relatively unknown input. In any case, I believe this effectively breaks matplotlib in the IPython notebook on windows and other very simple things. Behold: C:\>python -c "import matplotlib" any_old_thing_with_\u_in_it Traceback (most recent call last): File "<string>", line 1, in <module> File "c:\python27\lib\site-packages\matplotlib\__init__.py", line 240, in <module> class Verbose: File "c:\python27\lib\site-packages\matplotlib\__init__.py", line 252, in Verbose for arg in map(six.u, sys.argv[1:]): File "c:\python27\lib\site-packages\six.py", line 468, in u return unicode(s, "unicode_escape") UnicodeDecodeError: 'unicodeescape' codec can't decode bytes in position 19-20: truncated \uXXXX escape It seems to me that this changeset needs to be rolled back, but I don't clearly see the problem that it was intended to fix. Joel
On 6 December 2013 10:37, Joel B. Mohler <jm...@ga...> wrote: > It seems to me that this changeset needs to be rolled back, but I don't > clearly see the problem that it was intended to fix. > I assume that someone wanted to work with the arguments as text (i.e. unicode) strings. A robust way to do this would be something like the str_to_unicode function we have in IPython - it's a no-op on Python 3, and does a robust decode (using errors='replace') on Python 2. Thomas
I'll bring this to @minrk's attention in the original issue (#2534) Mike On 12/06/2013 02:20 PM, Thomas Kluyver wrote: > On 6 December 2013 10:37, Joel B. Mohler <jm...@ga... > <mailto:jm...@ga...>> wrote: > > It seems to me that this changeset needs to be rolled back, but I > don't clearly see the problem that it was intended to fix. > > > I assume that someone wanted to work with the arguments as text (i.e. > unicode) strings. A robust way to do this would be something like the > str_to_unicode function we have in IPython - it's a no-op on Python 3, > and does a robust decode (using errors='replace') on Python 2. > > Thomas > > > ------------------------------------------------------------------------------ > Sponsored by Intel(R) XDK > Develop, test and display web and hybrid apps with a single code base. > Download it for free now! > http://pubads.g.doubleclick.net/gampad/clk?id=111408631&iu=/4140/ostg.clktrk > > > _______________________________________________ > Matplotlib-devel mailing list > Mat...@li... > https://lists.sourceforge.net/lists/listinfo/matplotlib-devel -- _ |\/|o _|_ _. _ | | \.__ __|__|_|_ _ _ ._ _ | ||(_| |(_|(/_| |_/|(_)(/_|_ |_|_)(_)(_)| | | http://www.droettboom.com