[Python-ideas] warnings package might provide an Option or a pre-filled OptionParser

Currently, `warnings` uses the `-W` interpreter-level option for non-programmatic configuration. While nice, this option isn't available out of the box to scripts where the interpreter is implicit (./script.py, or `script` where it's on $PATH). I believe it would be nice if `warnings` provided something one could simply drop into `optparse` to automagically get -W handling, without having to define custom option actions every time. What do you think?