8.1.3 在Python 中访问PyFrameObject 对象

 [caller.py]
import sys
value = 3
def g():
frame = sys._getframe()
print 'current function is : ', frame.f_code.co_name
caller = frame.f_back
print 'caller function is : ', caller.f_code.co_name
print "caller's local namespace : ", caller.f_locals
print "caller's global namespace : ",
caller.f_globals.keys()
def f():
a = 1
b = 2
g()
def show():
f()
show()

 [caller.py 的输出结果]
F:\PythonBook\Src\frame>python caller.py
current function is : g
caller function is : f
caller's local namespace : {'a': 1, 'b': 2}
caller's global namespace :
['g', 'f', '__builtins__', '__file__', 'show',
'value', 'sys', '__name__', '__doc__']

[frame_getter.py]
import sys
def get_current_frame():
try:
1/0
except Exception, e:
type, value, traceback = sys.exc_info()
return traceback.tb_frame.f_back