Try the shell command "sage -sh" and then "echo $PYTHONHOME" and "echo$PYTHONPATH". If this doesn't give enough information, have a look at this SO question about retreiving python module path from within python. You should be able to use that technique inside sage to find what you need.
Try the shell command "sage -sh" and then "echo $PYTHONHOME" and "echo$PYTHONPATH". If this doesn't give enough information, have a look at this SO question about retreiving python module path from within python. You should be able to use that technique inside sage to find what you need.