#!/usr/bin/env python

x = 2  # This statement gets skipped the 2nd time around
q = 1  # This statement gets skipped too!

try:   # tracer() will exit here if z == 0 and line_no == 4
    y = z   
except NameError:
    z = 0

print "When tracing via tracer(), f_lineno will be set to 2 here."
print "You should never get here when tracing"