Python Frame

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

sys._getframe([depth])

Return a frame object from the call stack
depth 表示調用棧的深度，默認為0，返回棧頂 

def get_cur_info():
    print sys._getframe().f_code.co_filename #當前文件名，可以通過__file__獲得
    print sys._getframe(0).f_code.co_name   #當前函數名
    print sys._getframe(1).f_code.co_name
    #調用該函數的函數的名字，如果沒有被調用，則返回<module>，貌似call stack的棧低
    print sys._getframe().f_lineno #當前行號

 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()

輸出結果：

<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 屬性

f_back -> frameobject

f_builtins -> dict key:python的內置函數名

f_code -> 代碼對象