Python Frame

http://farmdev.com/src/secrets/framehack/index.html

sys._getframe([depth])

Return a frame object from the call stack
depth 表示调用栈的深度，默认为0，返回栈顶

def get_cur_info():

    print sys._getframe().f_code.co_filename #当前文件名，可以通过__file__获得

    print sys._getframe(0).f_code.co_name   #当前函数名

    print sys._getframe(1).f_code.co_name

    #调用该函数的函数的名字，如果没有被调用，则返回<module>，貌似call stack的栈低

    print sys._getframe().f_lineno #当前行号

例：

 import sys

 def one():

     two()

 def two():

     three()

 def three():

     for num in range(3):

         frame = sys._getframe(num)

         show_frame(num, frame)

 def show_frame(num, frame):

     print frame

     print "  frame     = sys._getframe(%s)" % num

     print "  function  = %s()" % frame.f_code.co_name

     print "  file/line = %s:%s" % (frame.f_code.co_filename, frame.f_lineno)

 one()

输出结果：

<frame object at 0x606c50>

  frame     = sys._getframe(0)

  function  = three()

  file/line = stack.py:12

<frame object at 0x180be10>

  frame     = sys._getframe(1)

  function  = two()

  file/line = stack.py:7

<frame object at 0x608d30>

  frame     = sys._getframe(2)

  function  = one()

  file/line = stack.py:4

sys._getframe([depth]) -> frameobject

frameobject 属性

f_back -> frameobject

f_builtins -> dict key:python的内置函数名

f_code -> 代码对象