In response to Kent's suggestion here is an updated post showing the python code and the error log. The original reason for using try was I thought maybe this was scoping problem and that maybe 2nd time through the call it needed to import it again from scratch. As a side observation for Kent I also tried replacing the exec on the import statement with __init__('siberia900') and other variants using a text variable and while they appeared to work I got a the following error
>>> __import__('siberia900') <module 'siberia900' from 'siberia900.pyc'> >>> siberia900.version Traceback (most recent call last): File "<stdin>", line 1, in <module> NameError: name 'siberia900' is not defined Maybe its related don't know. Anyway here's the original problem again with more info. --------------------------------- current_model_name='' def load(): global current_model_name model='siberia900' text1='import '+model text2='reload('+model+')' if model==current_model_name: print 'here 1', text2 exec(text2) else: print 'here 10', text1 exec(text1) current_model_name=model version=eval(model+'.version') return(version) --------------------------------- >>> import mytest1 >>> mytest1.load() here 10 import siberia900 '1.00' >>> mytest1.load() here 1 reload(siberia900) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "mytest1.py", line 10, in load exec(text2) File "<string>", line 1, in <module> NameError: name 'siberia900' is not defined --------------------------------- ==================================================================== Prof Garry Willgoose, Australian Professorial Fellow in Environmental Engineering, Director, Centre for Climate Impact Management (C2IM), School of Engineering, The University of Newcastle, Callaghan, 2308 Australia. Phone: (International) +61 2 4921 6050 (Tues-Thurs); +61 2 6545 9574 (Fri-Mon) FAX: (International) +61 2 4921 6991 (Uni); Env. Engg. Secretary: (International) +61 2 4921 6042 Centre WWW : www.c3im.org.au email: [EMAIL PROTECTED] email-for-life: [EMAIL PROTECTED] ==================================================================== "Do not go where the path may lead, go instead where there is no path and leave a trail" Ralph Waldo Emerson ==================================================================== _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor