Install error "import warnings"

Hi,

I have a problem trying to install Salome.  I have sucessfully managed to install Salome once before, however after I did that I then installed OpenCascade and both were working (I think?).

In furstration at not being able to make them do what I wanted, I removed all of the directorys for both, very untidily using the rm -rf cmd, not any uninstall options.

Now when I have gone back to reinstall Salome I get the following transcript:

james/InstallWizard_3.2.6_RedHat8.0> ./runInstall
'import site' failed; use -v for traceback
Traceback (most recent call last):
  File "./runInstall", line 16, in ?
    import warnings
ImportError: No module named warnings

I suspect it has something to do with the path to python, but I'm not very good with linux and I don't know how to change that.

Does anybody have any ideas?

Thanks

James