What modules come builtin with your Python? Let's exclude the internal _ starting ones for this question. You know those? Are you sure? Good, because I did not!
(Hint WindowsXP and Python2.72 has 27 builtin modules)
Here the answer in code
import sys print('\n'.join(n for n in sys.builtin_module_names if not n.startswith('_')))
help(module_name) could be handy after this. Or looking from builtin help. I sure was curious to check the audioop.