---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-1-3f0e4b94a8ea> in <module>()
----> 1 from mayavi import mlab

/Users/mwaskom/anaconda/lib/python2.7/site-packages/mayavi/mlab.py in <module>()
     25
     26 # Mayavi imports
---> 27 from mayavi.tools.camera import view, roll, yaw, pitch, move
     28 from mayavi.tools.figure import figure, clf, gcf, savefig, \
     29     draw, sync_camera, close, screenshot

/Users/mwaskom/anaconda/lib/python2.7/site-packages/mayavi/tools/camera.py in <module>()
     23 # We can't use gcf, as it creates a circular import in camera management
     24 # routines.
---> 25 from .engine_manager import get_engine
     26
     27

/Users/mwaskom/anaconda/lib/python2.7/site-packages/mayavi/tools/engine_manager.py in <module>()
     10
     11 # Local imports
---> 12 from mayavi.preferences.api import preference_manager
     13 from mayavi.core.registry import registry
     14 from mayavi.core.engine import Engine

/Users/mwaskom/anaconda/lib/python2.7/site-packages/mayavi/preferences/api.py in <module>()
      2
      3 # The global PreferenceManager instance
----> 4 from .preference_manager import preference_manager
      5 from .bindings import set_scene_preferences, get_scene_preferences

/Users/mwaskom/anaconda/lib/python2.7/site-packages/mayavi/preferences/preference_manager.py in <module>()
     27 from traits.etsconfig.api import ETSConfig
     28 from traits.api import HasTraits, Instance
---> 29 from traitsui.api import View, Group, Item
     30 from apptools.preferences.api import (ScopedPreferences, IPreferences,
     31         PreferencesHelper)

/Users/mwaskom/anaconda/lib/python2.7/site-packages/traitsui/api.py in <module>()
     34
     35 try:
---> 36     from .editors.api import ArrayEditor
     37 except ImportError:
     38     # ArrayEditor depends on numpy, so ignore if numpy is not present.

/Users/mwaskom/anaconda/lib/python2.7/site-packages/traitsui/editors/__init__.py in <module>()
     21
     22 try:
---> 23     from .api import ArrayEditor
     24 except ImportError:
     25     pass

/Users/mwaskom/anaconda/lib/python2.7/site-packages/traitsui/editors/api.py in <module>()
     22 from .button_editor import ButtonEditor
     23 from .check_list_editor import CheckListEditor
---> 24 from .code_editor import CodeEditor
     25 from .color_editor import ColorEditor
     26 from .compound_editor import CompoundEditor

/Users/mwaskom/anaconda/lib/python2.7/site-packages/traitsui/editors/code_editor.py in <module>()
     34 #-------------------------------------------------------------------------------
     35
---> 36 class ToolkitEditorFactory ( EditorFactory ):
     37     """ Editor factory for code editors.
     38     """

/Users/mwaskom/anaconda/lib/python2.7/site-packages/traitsui/editors/code_editor.py in ToolkitEditorFactory()
     46
     47     # Background color for marking lines
---> 48     mark_color = Color( 0xECE9D8 )
     49
     50     # Object trait containing the currently selected line (optional)

/Users/mwaskom/anaconda/lib/python2.7/site-packages/traits/traits.pyc in __call__(self, *args, **metadata)
    520
    521     def __call__ ( self, *args, **metadata ):
--> 522         return self.maker_function( *args, **metadata )
    523
    524 class TraitImportError ( TraitFactory ):

/Users/mwaskom/anaconda/lib/python2.7/site-packages/traits/traits.pyc in Color(*args, **metadata)
   1234     from traitsui.toolkit_traits import ColorTrait
   1235
-> 1236     return ColorTrait( *args, **metadata )
   1237
   1238 Color = TraitFactory( Color )

/Users/mwaskom/anaconda/lib/python2.7/site-packages/traitsui/toolkit_traits.pyc in ColorTrait(*args, **traits)
      5
      6 def ColorTrait ( *args, **traits ):
----> 7     return toolkit().color_trait( *args, **traits )
      8
      9 def RGBColorTrait ( *args, **traits ):

/Users/mwaskom/anaconda/lib/python2.7/site-packages/traitsui/toolkit.pyc in toolkit(*toolkits)
    159             try:
    160                 with provisional_toolkit(toolkit_name):
--> 161                     _toolkit = _import_toolkit(toolkit_name)
    162                     return _toolkit
    163             except (AttributeError, ImportError) as exc:

/Users/mwaskom/anaconda/lib/python2.7/site-packages/traitsui/toolkit.pyc in _import_toolkit(name)
     81
     82 def _import_toolkit ( name ):
---> 83     return __import__( name, globals=globals(), level=1 ).toolkit
     84
     85

/Users/mwaskom/anaconda/lib/python2.7/site-packages/traitsui/qt4/__init__.py in <module>()
     16 # import pyface.qt before anything else is done so the sipapi
     17 # can be set correctly if needed
---> 18 import pyface.qt
     19
     20 #----------------------------------------------------------------------------

/Users/mwaskom/anaconda/lib/python2.7/site-packages/pyface/qt/__init__.py in <module>()
     38
     39 elif qt_api == 'pyqt':
---> 40     prepare_pyqt4()
     41
     42 elif qt_api != 'pyside':

/Users/mwaskom/anaconda/lib/python2.7/site-packages/pyface/qt/__init__.py in prepare_pyqt4()
     15     # Set PySide compatible APIs.
     16     import sip
---> 17     sip.setapi('QDate', 2)
     18     sip.setapi('QDateTime', 2)
     19     sip.setapi('QString', 2)

ValueError: API 'QDate' has already been set to version 1