problem reading data file in stock_demo.py

C:\Matplotlib\matplotlib src\examples>python stock_demo.py

    > Traceback (most recent call last): File "stock_demo.py",
    > line 4, in ? from matplotlib.matlab import * File
    > "C:\Python23\lib\site-packages\matplotlib\matlab.py", line
    > 134, in ? from axes import Axes File
    > "C:\Python23\lib\site-packages\matplotlib\axes.py", line
    > 9, in ? from artist import Artist File
    > "C:\Python23\lib\site-packages\matplotlib\artist.py", line
    > 4, in ? from transforms import identity_transform File
    > "C:\Python23\lib\site-packages\matplotlib\transforms.py",
    > line 181, in ? from _transforms import IDENTITY, LOG10,
    > Func, FuncXY, PolarXY ImportError: cannot import name
    > IDENTITY

    > C:\Matplotlib\matplotlib src\examples>

Something is wrong with your installation. My transforms.py line 181
is something different. _transforms should be providing IDENTITY.

    > Is version 0.54.2 not the correct starting point for doing
    > this unzip? If solving this is a hassle, I don't mind
    > going back to the old 0.54.2 and waiting for the bug fixes
    > that come with the next proper release.

We're planning on doing a release in the near future, so if you can
wait for the new installer, that would be easiest.

JDH