HI, all: There is a bug about mysql-python, https://sourceforge.net/tracker/?func=detail&aid=1464563&group_id=22307&atid=374932. After review the code of libmysqlclient_r , I find for every new thread to create connection, it will call my_thread_init to init some thread local variable and other things. but the client api seems not using this thread local variable almost, just for some debug information. Can using macro remove this when the code using by libmysqlclient_r.so? If can do that, to fix the bug is easy. sorry for my poor engish, and this maybe should post in mysql mail-list! Thanks!