Race condition provoked in TimeArray

[miketrumpis]

I'm seeing this race condition with regards to "_conversion_factor" in the TimeArray. It's popped up under the nose tests (output pasted below), and when trying to build the examples in docs.

Recently updated MPL, so I'll see if reverting makes a difference.

nosetest output:

....................................................Exception RuntimeError: 'maximum recursion depth exceeded while calling a Python object' in <type 'exceptions.AttributeError'> ignored
ERROR: nitime.tests.test_viz.test_plot_xcorr

---

Traceback (most recent call last):
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/nose/case.py", line 197, in runTest
self.test(_self.arg)
File "/Users/mike/workywork/nitime/nitime/tests/test_viz.py", line 41, in test_plot_xcorr
line_labels=['a', 'b'])
File "/Users/mike/workywork/nitime/nitime/viz.py", line 462, in plot_xcorr
label=this_labels.pop())
File "/Users/mike/usr/lib/python2.6/site-packages/matplotlib-1.3.1rc2-py2.6-macosx-10.6-x86_64.egg/matplotlib/axes.py", line 4137, in plot
for line in self._get_lines(_args, **kwargs):
File "/Users/mike/usr/lib/python2.6/site-packages/matplotlib-1.3.1rc2-py2.6-macosx-10.6-x86_64.egg/matplotlib/axes.py", line 317, in _grab_next_args
for seg in self._plot_args(remaining, kwargs):
File "/Users/mike/usr/lib/python2.6/site-packages/matplotlib-1.3.1rc2-py2.6-macosx-10.6-x86_64.egg/matplotlib/axes.py", line 295, in _plot_args
x, y = self._xy_from_xy(x, y)
File "/Users/mike/usr/lib/python2.6/site-packages/matplotlib-1.3.1rc2-py2.6-macosx-10.6-x86_64.egg/matplotlib/axes.py", line 213, in _xy_from_xy
bx = self.axes.xaxis.update_units(x)
File "/Users/mike/usr/lib/python2.6/site-packages/matplotlib-1.3.1rc2-py2.6-macosx-10.6-x86_64.egg/matplotlib/axis.py", line 1336, in update_units
converter = munits.registry.get_converter(data)
File "/Users/mike/usr/lib/python2.6/site-packages/matplotlib-1.3.1rc2-py2.6-macosx-10.6-x86_64.egg/matplotlib/units.py", line 148, in get_converter
converter = self.get_converter(xravel[0])

<<< This repeats about ~100x >>>

File "/Users/mike/usr/lib/python2.6/site-packages/matplotlib-1.3.1rc2-py2.6-macosx-10.6-x86_64.egg/matplotlib/units.py", line 148, in get_converter
converter = self.get_converter(xravel[0])
File "/Users/mike/workywork/nitime/nitime/timeseries.py", line 233, in getitem
return self[[key]].reshape(())
File "/Users/mike/workywork/nitime/nitime/timeseries.py", line 239, in getitem
return np.ndarray.getitem(self, key)
File "/Users/mike/workywork/nitime/nitime/timeseries.py", line 207, in array_finalize
if not hasattr(self, '_conversion_factor'):
AttributeError: 'TimeArray' object has no attribute '_conversion_factor'

[miketrumpis]

This issue has vanished when reverting to MPL release 1.3.0 (from 1.3.1 rc2). I'm closing the issue.