[Tutor] Myplotlab issue

[bgenest at masonlive.gmu.edu]

Hello,

I am currently working with a simple program in Python (just starting out) and am getting an error message:

Traceback (most recent call last):
  File "/Users/nomargfan661/Desktop/PythonProjects/chapter3/graphics.py", line 3
    from pylab import plot,show
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pylab.py", line 1
    from matplotlib.pylab import *
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/pylab.py", line 269
    from matplotlib.pyplot import *
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/pyplot.py", line 29
    from matplotlib.figure import Figure, figaspect
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/figure.py", line 36
    from matplotlib.axes import Axes, SubplotBase, subplot_class_factory
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/axes/__init__.py", line 4
    from ._subplots import *
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/axes/_subplots.py", line 10
    from matplotlib.axes._axes import Axes
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/axes/_axes.py", line 17
    from matplotlib.cbook import _string_to_bool, mplDeprecation
ImportError: cannot import name _string_to_bool

With this program, I am just trying to plot data points as written in a textbook from which I am learning.  I have installed everything properly (Python, VPython, numpy, and matplotlib (and as a result, pyplot).  The program is:

from __future__ import division,print_function

from pylab import plot,show
y = [1.0,2.4,1.7,0.3,0.6,1.8]

plot(y)
show()

I am running Python 2.7 and all modules are compatible with version 2.7 on Mac OS X 10.10.  I have tested other programs I have written which use VPython and numpy and I have no problems with those.  I only have one program using matplotlib, though, so I don’t know what’s wrong.  Would anybody happen to know how to help with fixing this issue?

Thanks,
Brandon