import sys
def tfct(frame, event, arg):
    print frame.f_code.co_filename, frame.f_lineno, event
    return tfct
sys.settrace(tfct)

def x():
    r = 1

    if r > 0:
        r = 1    # line 11
    else:
        pass     # line 13 (gets invalid 'line' event)

x()