docs: def parse_and_bind(self, string):
          u'''Parse and execute single line of a readline init file.'''
          try:
              log(u'parse_and_bind("%s")' % string)
              if string.startswith(u'#'):
                  return
              if string.startswith(u'set'):
                  m = re.compile(ur'set\s+([-a-zA-Z0-9]+)\s+(.+)\s*$').match(string)
                  if m:
                      var_name = m.group(1)
                      val = m.group(2)
                      try:
                          setattr(self.mode, var_name.replace(u'-',u'_'), val)
                      except AttributeError:
                          log(u'unknown var="%s" val="%s"' % (var_name, val))
                  else:
                      log(u'bad set "%s"' % string)
                  return
              m = re.compile(ur'\s*(.+)\s*:\s*([-a-zA-Z]+)\s*$').match(string)
              if m:
                  key = m.group(1)
                  func_name = m.group(2)
                  py_name = func_name.replace(u'-', u'_')
                  try:
                      func = getattr(self.mode, py_name)
                  except AttributeError:
                      log(u'unknown func key="%s" func="%s"' % (key, func_name))
                      if self.debug:
                          print u'pyreadline parse_and_bind error, unknown function to bind: "%s"' % func_name
                      return
                  self.mode._bind_key(key, func)
          except:
              log(u'error')
              raise