I am using Fedora 19, 64 bit, and the distribution's python 3.3.2, and
the most recent version of mpl from git
there seems to be a bug in the starup routine where proper conversion
from bytes to string (as needed for Python 3) is not done
the problem is in
/matplotlib/__init__.py, line 459 ... 460
459 gs_exec, gs_v = checkdep_ghostscript()
460 if compare_versions(gs_v, gs_sugg): pass
ipdb> gs_exec, gs_v
('gs', b'9.07')
where clearly gs_v needs to be str
Could you please make checkdep_ghostscript() to be python3-save by
changing line 334 from
v = stdout[:-1]
to
v = stdout[:-1].decode('ascii')
(my apologies not following the bug report procedures; I hope you can
consider it anyway)
-Alexander
~/python/source3>ip
Python 3.3.2 (default, Aug 23 2013, 19:00:04)
Type "copyright", "credits" or "license" for more information.
IPython 0.13.2 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object', use 'object??' for extra details.
[TerminalIPythonApp] GUI event loop or pylab initialization failed
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/usr/lib/python3.3/site-packages/IPython/core/pylabtools.py in
find_gui_and_backend(gui)
194 """
195
--> 196 import matplotlib
197
198 if gui and gui != 'auto':
/home/alex/mpl/usr/lib64/python3.3/site-packages/matplotlib/__init__.py
in <module>()
975
976 rcParams['ps.usedistiller'] =
checkdep_ps_distiller(rcParams['ps.usedistiller'])
--> 977 rcParams['text.usetex'] = checkdep_usetex(rcParams['text.usetex'])
978
979 if rcParams['axes.formatter.use_locale']:
/home/alex/mpl/usr/lib64/python3.3/site-packages/matplotlib/__init__.py
in checkdep_usetex(s)
458
459 gs_exec, gs_v = checkdep_ghostscript()
--> 460 if compare_versions(gs_v, gs_sugg): pass
461 elif compare_versions(gs_v, gs_req):
462 verbose.report(('ghostscript-%s found. ghostscript-%s
or later is '
/home/alex/mpl/usr/lib64/python3.3/site-packages/matplotlib/__init__.py
in compare_versions(a, b)
116 "return True if a is greater than or equal to b"
117 if a:
--> 118 a = distutils.version.LooseVersion(a)
119 b = distutils.version.LooseVersion(b)
120 if a>=b: return True
/usr/lib64/python3.3/distutils/version.py in __init__(self, vstring)
308 def __init__ (self, vstring=None):
309 if vstring:
--> 310 self.parse(vstring)
311
312
/usr/lib64/python3.3/distutils/version.py in parse(self, vstring)
316 # use by __str__
317 self.vstring = vstring
--> 318 components = [x for x in self.component_re.split(vstring)
319 if x and x != '.']
320 for i, obj in enumerate(components):
TypeError: can't use a string pattern on a bytes-like object
------------------------------------------------------------------------------
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