code: def clean(options, info):
      
      info("Cleaning patterns %s", options.paved.clean.patterns)
      for wd in options.paved.clean.dirs:
          info("Cleaning in %s", wd)
          for p in options.paved.clean.patterns:
              for f in wd.walkfiles(p):
                  f.remove()
docs: Clean up extra files littering the source tree.
  
      options.paved.clean.dirs: directories to search recursively
      options.paved.clean.patterns: patterns to search for and remove