Issues with traits; virtualenv, pip, ubuntu 14.04

[KennethNielsen]

Hi

I'm having some problems installing pyparty on ubuntu 14.04 with virtual env and pip.

The main problem is that the current pyparty package in pypi has a requirement of a specific version (4.3.0) of traits, that is no longer installable from pypi. I tried to simply install the available version instead (4.5.0) but then I run into another problem. Enthought has changed their import paths so instead of:

from enthought.traits.api import ...
# it is now
from traits.api import ...

which means that the imports in:
tools/manager.py
trait_types/intornone.py
fails.

From here I went down two different paths. I tried to fix the imports in those two files and I installed the enthought etsproxy module, which is meant to translate the imports.

Both solutions mean that the basic test import:

from pyparty import *

works BUT if the run the basictest ipython notebook some things fail. More specifically in the block

ax1, ax2 = splot(1,2)

c.reset_background()
c.rez = (700,700)
c.background='orange'
c.show(ax1, title="Resolution set first")

c.reset_background()
c.background='orange'
c.rez = (700,700)
c.show(ax2, title="BG reset first");

the two c.background='orange' lines fails with this traceback:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-16-f30c5eb0ea46> in <module>()
      3 c.reset_background()
      4 c.rez = (700,700)
----> 5 c.background='orange'
      6 c.show(ax1, title="Resolution set first")
      7 

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/pyparty/tools/canvas.pyc in _set_background(self, bg)
    903     def _set_background(self, bg):
    904         """ Set background and use new resolution if there is one """
--> 905         self.set_bg(bg, keepres=False, inplace=True)
    906 
    907     # REDO THIS WITH COLOR NORM AND STUFF!  Also, dtype warning?

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/pyparty/tools/canvas.pyc in set_bg(self, bg, keepres, inplace)
    838 
    839         oldres = cout.rez
--> 840         cout._update_bg(bg)
    841 
    842         if keepres:

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/pyparty/tools/canvas.pyc in _update_bg(self, background)
    924         # colorstring or hex
    925         elif isinstance(background, basestring):
--> 926             self._background = bgu.from_string(background, self.rx, self.ry)
    927             self._bgstyle = 'file/colorstring/url'
    928 

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/pyparty/background/bg_utils.pyc in from_string(path_or_color, resx, resy)
     37     # Separte method because plan to expand later
     38     try:
---> 39         return imread(op.expanduser( path_or_color) ) #expand user ok for URL
     40     except IOError:
     41         if not resx:

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/skimage/io/_io.pyc in imread(fname, as_grey, plugin, flatten, **plugin_args)
     95 
     96     with file_or_url_context(fname) as fname:
---> 97         img = call_plugin('imread', fname, plugin=plugin, **plugin_args)
     98 
     99     if as_grey and getattr(img, 'ndim', 0) >= 3:

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/skimage/io/manage_plugins.pyc in call_plugin(kind, *args, **kwargs)
    207                                (plugin, kind))
    208 
--> 209     return func(*args, **kwargs)
    210 
    211 

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/matplotlib/pyplot.pyc in imread(*args, **kwargs)
   2213 @docstring.copy_dedent(_imread)
   2214 def imread(*args, **kwargs):
-> 2215     return _imread(*args, **kwargs)
   2216 
   2217 

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/matplotlib/image.pyc in imread(fname, format)
   1256             raise ValueError('Only know how to handle extensions: %s; '
   1257                              'with PIL installed matplotlib can handle '
-> 1258                              'more images' % list(six.iterkeys(handlers.keys)))
   1259         return im
   1260 

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/six.pyc in iterkeys(d, **kw)
    557 else:
    558     def iterkeys(d, **kw):
--> 559         return iter(d.iterkeys(**kw))
    560 
    561     def itervalues(d, **kw):

AttributeError: 'builtin_function_or_method' object has no attribute 'iterkeys'

and later in the block:

from pyparty.data import lena_who
c.background = lena_who()
c.show()
print 'newshape = ', c.shape

the call to the lena_who() functions fails with this traceback:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-35-0d50285db227> in <module>()
      1 from pyparty.data import lena_who
----> 2 c.background = lena_who()
      3 c.show()
      4 print 'newshape = ', c.shape

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/pyparty/data/__init__.pyc in lena_who(*args, **kwargs)
     52 def lena_who(*args, **kwargs):
     53     """ Yound lady, released with her full permission """
---> 54     return load("lena_who.jpg", *args, **kwargs)
     55 
     56 def nanogold(*args, **kwargs):

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/pyparty/data/__init__.pyc in load(f, rez)
     36         Image loaded from skimage.data_dir.
     37     """
---> 38     img = imread(op.join(data_dir, f))
     39     if rez:
     40         rx, ry = rez

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/skimage/io/_io.pyc in imread(fname, as_grey, plugin, flatten, **plugin_args)
     95 
     96     with file_or_url_context(fname) as fname:
---> 97         img = call_plugin('imread', fname, plugin=plugin, **plugin_args)
     98 
     99     if as_grey and getattr(img, 'ndim', 0) >= 3:

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/skimage/io/manage_plugins.pyc in call_plugin(kind, *args, **kwargs)
    207                                (plugin, kind))
    208 
--> 209     return func(*args, **kwargs)
    210 
    211 

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/matplotlib/pyplot.pyc in imread(*args, **kwargs)
   2213 @docstring.copy_dedent(_imread)
   2214 def imread(*args, **kwargs):
-> 2215     return _imread(*args, **kwargs)
   2216 
   2217 

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/matplotlib/image.pyc in imread(fname, format)
   1256             raise ValueError('Only know how to handle extensions: %s; '
   1257                              'with PIL installed matplotlib can handle '
-> 1258                              'more images' % list(six.iterkeys(handlers.keys)))
   1259         return im
   1260 

/home/kenni/tmp/ve/base/local/lib/python2.7/site-packages/six.pyc in iterkeys(d, **kw)
    557 else:
    558     def iterkeys(d, **kw):
--> 559         return iter(d.iterkeys(**kw))
    560 
    561     def itervalues(d, **kw):

AttributeError: 'builtin_function_or_method' object has no attribute 'iterkeys'

Does anyone has any hints at how to fix this or how to install pyparty with pip in a virtualenv?

Regards Kenneth