Matplotlib dateutil bug

Background

When you create a range in relax, it is created as an xrange object.

You cannot by default slice through xrange objects.

The dateutil.rrule package used in matplotlib/pylab creates some list, which it expects it can slice through.
But relax will create these as xrange which is not-sliceable.

Let's try it out.

USER@MACHINE: $ python

>>> x=range(10)
>>> type(x)
<type 'list'>
>>> print x[:3]
[0, 1, 2]

# Lets create an xrange object.
>>> y=xrange(10)
>>> type(y)
<type 'xrange'>
>>> print y[:3]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: sequence index must be integer, not 'slice'

Now let's try in relax.

USER@MACHINE: $ relax

relax> x=range(10)
relax> type(x)
<type 'xrange'>
relax> print x[:3]
Traceback (most recent call last):
  File "<console>", line 1, in <module>
TypeError: sequence index must be integer, not 'slice'

# Convert to list from xrange object.
relax> y=list(range(10))
relax> print y[:3]
[0, 1, 2]
relax>

The error when importing matplotlib / pyplot

USER@MACHINE: $ relax

relax> from pylab import *
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/pylab.py", line 1, in <module>
    from matplotlib.pylab import *
  File "/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/matplotlib/pylab.py", line 221, in <module>
    from matplotlib import mpl  # pulls in most modules
  File "/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/matplotlib/mpl.py", line 3, in <module>
    from matplotlib import axes
  File "/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/matplotlib/axes.py", line 19, in <module>
    import matplotlib.dates as mdates
  File "/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/matplotlib/dates.py", line 119, in <module>
    from dateutil.rrule import rrule, MO, TU, WE, TH, FR, SA, SU, YEARLY, \
  File "/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/dateutil/rrule.py", line 26, in <module>
    MDAY366MASK = tuple(M31+M29+M31+M30+M31+M30+M31+M31+M30+M31+M30+M31+M31[:7])
TypeError: unsupported operand type(s) for +: 'xrange' and 'xrange'

Change bug in dateutil.rrule

bash
MFILE=`python -c "import dateutil.rrule; print(dateutil.rrule.__file__)"`
echo $MFILE
sudo sed -i -e 's/range(1,30), range(1,31), range(1,32)/list(range(1,30)), list(range(1,31)), list(range(1,32))/g' $MFILE
sudo sed -i -e 's/range(-29,0), range(-30,0), range(-31,0)/list(range(-29,0)), list(range(-30,0)), list(range(-31,0))/g' $MFILE

Test if it worked

cat <<'EOF' > relax_test.py
from pylab import *

t = arange(0.0, 2.0, 0.01)
s = sin(2*pi*t)
plot(t, s)

xlabel('time (s)')
ylabel('voltage (mV)')
title('About as simple as it gets, folks')
grid(True)
show()
EOF

$ relax relax_test.py