Problem using py-bt, py-locals, etc. during GDB debugging [solved]

[Wesley]

I hit a problem alike yours.
Cannot fix according your method.

Here is snippet:
root at localhost python]# gdb python 40290
GNU gdb (GDB) 7.7
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-unknown-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from python...done.
Attaching to program: /usr/local/bin/python, process 40290
Reading symbols from /lib64/ld-linux-x86-64.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib64/ld-linux-x86-64.so.2
0x00000030a98e15c3 in ?? ()
(gdb) py-bt
(gdb) py-list
Unable to locate python frame
(gdb) py-locals
Unable to locate python frame
(gdb) 

I use gdb 7.7, python 2.6.6 , centos 6.5 64bit
Any suggestion?

Thanks.
Wesley