There is a problem when I used the pylibmc. When I "import pylibmc", then I'll get some error following:
ImportError: /usr/local/python2.6/lib/python2.6/site-packages/_pylibmc.so: undefined symbol: memcached_server_list.
My enviroment are Python 2.6.5, libmemcached 0.39, memcached 1.4.5
So, how can I solve it?
Thanks very much.
UPDATE 1: 
I read the pylibmc doc again, and found this: libmemcached 0.32 or later (last test with 0.38). Then I guest maybe my libmemcached is too newer to avaliable.
UPDATE 2:
I test the libmemcached 0.38, there is another error in _pylibmc.so: Undefined symbol: memcached_server_count.
I was having the same problem and I got it working by using libmemcached 0.34 and then setting the environment variable LD_LIBRARY_PATH to /usr/local/lib (where the libmemcache library was stored).
pylibmc: undefined symbol: memcached_server_list