python-memcache is a thread safe library. In memcache.py, which is the single source file, you’ll find:
Which means that all data accessed through self.variable_name have values which are thread specific (as long as you are running python version 2.4 or higher.) Very cool. Before I looked at the code, I wrote some multi-threaded tests to check and see if anything fishy would happen. I’d say looking at the code is a better solution.
more details threading.local