Also rename the driver function to test_main() instead of main_test().

ceval.c. This is worth about a .03-.04us speedup on a simple with block.

issues.

Thanks to Antoine Pitrou for the patch.

stand alone distribution of bsddb that includes its own small copy of
test_support for the needed functionality on older pythons.

support "create table if not exists", yet.

Have itertools.chain() consume its inputs lazily instead of building a tuple of iterators at the outset.