You could catch the exception and write the error message. Something like this (I haven't tested it):
<%
try:
import MySQLdb
except ImportError:
self.writeln("You need MySQLdb in the PYTHONPATH or installed libraries to run this PSP page.")
return
%>
If you want a more elaborate error handling system, you could add a method writeError() to the base class of your pages and call that, which would write out a nice HTML page with your error message. Of course for this to work, you need to arrange your pages such that the processing and error checking is done before you output any HTML. Otherwise, your partially written HTML would be mixed with the HTML from writeError().
I'm not sure with PSP, but it might be something like:
def _respond(self, trans):
try:
Page._respond(self, trans)
except ImportError, e:
self.writeln("Error; missing package.<br><b>%s</b>" % e)-- Ian Bicking / [EMAIL PROTECTED] / http://blog.ianbicking.org
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