code: def _ipv4_to_bits(ipaddr):
      '''
      Accepts an IPv4 dotted quad and returns a string representing its binary
      counterpart
      '''
      return ''.join([bin(int(x))[2:].rjust(8, '0') for x in ipaddr.split('.')]f _ipv4_to_bits(ipaddr):
      '''
      Accepts an IPv4 dotted quad and returns a string representing its binary
      counterpart
      '''
      return ''.join([bin(int(x))[2:].rjust(8, '0') for x in ipaddr.split('.')])
docs: Accepts an IPv4 dotted quad and returns a string representing its binary
      counterpart