Python如何记录调用堆栈日志实现方法？

import sys

import os

def detailtrace(info):

  retStr = ""

  curindex=0

  f = sys._getframe()

  f = f.f_back    # first frame is detailtrace, ignore it

  while hasattr(f, "f_code"):

    co = f.f_code

    retStr = "%s(%s:%s)->"%(os.path.basename(co.co_filename),

         co.co_name,

         f.f_lineno) + retStr

    f = f.f_back

  print retStr+info

def foo():

  detailtrace("hello world")

def bar():

  foo()

def main():

  bar()

if name == "main":

  main()