Error: ImportError: cannot import name Int8

Community matplotlib-users
1

Hi,

I want to use matplotlib, version 0.87.3, on my laptop (FC5) running numpy1.0.1. I had the following settings in my matplotlibrc:

numerix:numpy

Then I installed matplotlib using:

python setup.py
build
python setup.py install

which all seemed to work fine. But then, trying to import pylab, leads to the following error:

from pylab import *
File “/usr/lib/python2.4/site-packages/pylab.py”, line 1, in ?

from matplotlib.pylab import *

File “/usr/lib/python2.4/site-packages/matplotlib/pylab.py”, line 196, in ?
import cm
File “/usr/lib/python2.4/site-packages/matplotlib/cm.py”, line 5, in ?

import colors

File “/usr/lib/python2.4/site-packages/matplotlib/colors.py”, line 33, in ?
from numerix import array, arange, take, put, Float, Int, where,
File “/usr/lib/python2.4/site-packages/matplotlib/numerix/init.py”, line 68, in ?

from _sp_imports import nx, infinity

File “/usr/lib/python2.4/site-packages/matplotlib/numerix/_sp_imports.py”, line 1, in ?
from numpy import Int8, UInt8,
ImportError: cannot import name Int8

How to fix this problem?

Cheers
Alex

2

Alex,

Download the current mpl release and try installing that, after completely cleaning out the present installation. (I would also be inclined to delete the numpy and install that also from the latest tarball, and then build and install mpl.) 0.87.3 is pretty old. There was a while when mpl and numpy were evolving together and had to be kept in sync; evidently 0.87.3 was based on an older numpy version, something prior to numpy 1.0.

For anything that you install yourself, I recommend using the --prefix=/usr/local option to "python setup.py install". I like to keep things I install separate from things that come from distro packages.

Eric

Alexander Dietz wrote:

···

Hi,

I want to use matplotlib, version 0.87.3, on my laptop (FC5) running numpy1.0.1. I had the following settings in my matplotlibrc:

numerix:numpy

Then I installed matplotlib using:

python setup.py build
python setup.py install

which all seemed to work fine. But then, trying to import pylab, leads to the following error:

  from pylab import *
  File "/usr/lib/python2.4/site-packages/pylab.py", line 1, in ?
    from matplotlib.pylab import *
  File "/usr/lib/python2.4/site-packages/matplotlib/pylab.py", line 196, in ?
    import cm
  File "/usr/lib/python2.4/site-packages/matplotlib/cm.py", line 5, in ?
    import colors
  File "/usr/lib/python2.4/site-packages/matplotlib/colors.py", line 33, in ?
    from numerix import array, arange, take, put, Float, Int, where, \
  File "/usr/lib/python2.4/site-packages/matplotlib/numerix/__init__.py", line 68, in ?
    from _sp_imports import nx, infinity
  File "/usr/lib/python2.4/site-packages/matplotlib/numerix/_sp_imports.py", line 1, in ?
    from numpy import Int8, UInt8, \
ImportError: cannot import name Int8

How to fix this problem?

Cheers
  Alex

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