def _is_unicode_combining(u):
 i = ord(u)
 for r in _COMBINING_RANGES:
  if (r[0] <= i <= r[1]):
   return True
 return False

def _is_unicode_combining ( u ) : i = ord ( u ) for r in _COMBINING_RANGES : if ( r [ 0 ] <= i <= r [ 1 ] ) : return True return False
check if input unicode is combining diacritical mark .