python中的错误处理

def foo():  r = some_function()  if r==(-1):    return (-1)  # do something  return rdef bar():  r = foo()  if r==(-1):    print 'Error'  else:    pass

try:  print 'try...'  r = 10 / 0  print 'result:', rexcept ZeroDivisionError, e:  print 'except:', efinally:  print 'finally...'print 'END'