import cgitb

class WeirdObject(object):
    def __getattr__(self, attr):
        if attr == 'a':
            return 'the letter a'
        elif attr == 'b':
            return str(slf) # Intentional NameError
        raise AttributeError(attr)

try:
    weird = WeirdObject()
    print 'A:', weird.a
    print 'B:', weird.b
    print 'C:', weird.c
except Exception, e:
    import sys
    print
    print 'Something went wrong - attempting to generate HTML stack trace.'
    try:
        html_text = cgitb.html(sys.exc_info())
    except:
        print 'Error generating HTML stack trace!'
        raise
    else:
        print 'Here is stack trace in HTML:'
        print html_text