The problem is that when trying to do the second insert, sqlite seems to sleep
for a very long time. Here is the output from strace:
read(6, "SQLite format 3\0\4\0\1\1\0@ \0\0\0\1\0\0\0\0"..., 1024) = 1024
nanosleep({4294, 966296000}, <unfinished ...>
I don't know which version this was fixed in, but 3.2.1 definitely fails.
This is based on pysqlite2.1.3, and provides a DB-API interface in
the standard library. You'll need sqlite 3.2.2 or later to build
this - if you have an earlier version, the C extension module will
not be built.