A little more investigation has shown this. The following code does
not work on a Mac with new versions of wxPython.
def CheckForWx():
"""Try to import wx module and check its version"""
majorVersion = 2.8
minorVersion = 1.1
try:
import wxversion
wxversion.select(str(majorVersion))
import wx
The problem lies in wxversion.select. It is looking for the SOURCE
CODE files in a BINARY wxPython installation. They simply are not
there. Here is what happens if I run this in the Python interpreter.
>>> import wx
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "//Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/site-packages/wx-2.8-mac-unicode/wx/__init__.py", line 45,
in <module>
File "//Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/site-packages/wx-2.8-mac-unicode/wx/_core.py", line 4, in
<module>
ImportError: No module named _core_
>>>
Note, it is checking for _core.py.
I have _core.pyo and _core.pyc, but not the source _core.py. I don't
have any source files in this binary installation. It works fine and
takes up less space I suppose. But this sequence ...
import wxversion
wxversion.select(str(majorVersion))
import wx
...fails not because I have the wrong version, but because I do not
have the SOURCE files that it uses to check for the version. This is a
bug in wxversion. It should be looking for _core.*, not a specific
source file _core.py. If I disable version checking by putting a
return at the beginning of CheckForWx(), wxgui loads and runs fine.
But we should have a version check (though I don't know if we need to
check it in so many modules; at startup should be enough.
The following code works fine.
def CheckForWx():
"""Try to import wx module and check its version"""
majorVersion = 2.8
minorVersion = 1.1
try:
#import wxversion
#wxversion.select(str(majorVersion))
import wx
version = wx.version().split(' ')[0]
if float(version[:3]) < majorVersion:
raise ValueError('You are using wxPython version %s' %
str(version))
if float(version[:3]) == 2.8 and \
float(version[4:]) < minorVersion:
raise ValueError('You are using wxPython version %s' %
str(version))
This checks to make sure that the default wxpython installation is
2.8.1.1 or higher. If not, it throws an error and does not load wxgui.
Michael
On Jul 26, 2008, at 12:42 PM, Martin Landa wrote:
Micheal,
2008/7/26 Michael Barton <[EMAIL PROTECTED]>:
import wxversion
wxversion.select(str(2.8))
import wx
wx.__version__
'2.8.8.1'
This version check is failing with 2.8.8.0 on the Mac even if the
correct
version is installed. It may be failing with other version too.
wx.__version__ looks for wxpython SOURCE (*.py) files that are not
currently being included in the wxpython binary installer for some
reason.
The object files are correct and being installed (*.pyo).
Why not just use wx.version()? It gives the correct response
regardless of
whether the source files are installed or not.
I changed CheckForWx() to use wx.version() instead of wx.__version__.
Hope it helps.
http://trac.osgeo.org/grass/changeset/32313
and
http://trac.osgeo.org/grass/changeset/32314
Martin
--
Martin Landa <landa.martin gmail.com> * http://gama.fsv.cvut.cz/
~landa *
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