def style(font):
  """Determine font style from canonical filename."""
  from fontbakery.constants import STATIC_STYLE_NAMES
  filename = os.path.basename(font)
  if '-' in filename:
    stylename = os.path.splitext(filename)[0].split('-')[1]
    if stylename in [name.replace(' ', '') for name in STATIC_STYLE_NAMES]:
      return stylename
  return None
Determine font style from canonical filename.