> Hi. Since Python 3.2, compileall functions supports the optimization level through the `optimize` parameter.

> There is no command-line option to control the optimization level used by the compile() function, because the Python interpreter itself already provides the option: python -O -m compileall.

This is the problem: You can't pass the optimization level to compile_dir|compile_file|compile_path. What, if you want for location a .pyc files and for location b .pyo files? Or even .pyc files and .pyo files for both locations? The only solution is to make a command call within the script which is a little bit ugly.