Help required to print MAC addresses

[buran]

output="""dishash all

    mac address    | bport | vlan  | flow agg |static|aging|proccess|deny_sa
==========================================================================
 e8 37 7a 9d 1a f1 |  1616 |  3612 | 44200059 |  0   |  1  |   0    |   0
 54 b8  a 49 97 d5 |  1696 |  3612 | 442000a5 |  0   |  1  |   0    |   0
 b0 b2 dc  5  d 87 |  1730 |  3612 | 442000c7 |  0   |  1  |   0    |   0
  0 16 fa d0 be a1 |   300 |  4094 | 4420002c |  1   |  0  |   0    |   0
 28 28 5d ed b4 41 |  1640 |  3612 | 4420006f |  0   |  0  |   0    |   0
  0 17 7c 76 99 4d |  1622 |  3612 | 4420005d |  0   |  1  |   0    |   0
 28 28 5d 94 78 da |  1704 |  3612 | 442000ad |  0   |  1  |   0    |   0
 48 ee  c 95  8 ee |  1630 |  3612 | 44200065 |  0   |  1  |   0    |   0
 48 ee  c bf 49 65 |  1628 |  3612 | 44200063 |  0   |  1  |   0    |   0
  0 17 7c 80 7c 4a |  1732 |  3612 | 442000c9 |  0   |  1  |   0    |   0
 e8 cc 18 62 4b d3 |  1736 |  3612 | 442000cd |  0   |  1  |   0    |   0
  0 17 7c 61 c2 c2 |  1596 |  3612 | 44200047 |  0   |  1  |   0    |   0
  0 25 5e 3f e7 18 |  1716 |  3612 | 442000b9 |  0   |  1  |   0    |   0
 cc 5d 4e 26 e8 e2 |  1706 |  3612 | 442000af |  0   |  1  |   0    |   0
  c d2 b5 5f 62 6e |  1632 |  3612 | 44200067 |  0   |  1  |   0    |   0
 28 28 5d f4  f dc |  1680 |  3612 | 44200095 |  0   |  1  |   0    |   0
 6c 72 20 ee a8 66 |  1594 |  3612 | 44200045 |  0   |  1  |   0    |   0
 e8 37 7a 9d  e 6b |  1734 |  3612 | 442000cb |  0   |  1  |   0    |   0
 cc 5d 4e 26 e2 30 |  1698 |  3612 | 442000a7 |  0   |  1  |   0    |   0
  c d2 b5 63 51 87 |  1710 |  3612 | 442000b3 |  0   |  1  |   0    |   0

Total number of MAC addresses: 20

MCR64A >"""


def mac2norm(mac):
    mac = mac.split(' ')
    return '{:0>2}:{:0>2}:{:0>2}:{:0>2}:{:0>2}'.format(*mac).upper()
    
header = ('mac address', 'bport', 'vlan')
print('{:^17} | {:^5} | {:^4}'.format(*header))
print('='*33)
for line in output.split('\n')[4:]:
    line = line.split('|')
    if len(line) == 8:
        mac, bport, vlan = map(lambda x: x.strip(), line[:3])
        mac_address = mac2norm(mac)
        print('{:^17} | {: >5} | {: >4}'.format(mac_address, bport, vlan))

Output:
   mac address    | bport | vlan
=================================
 E8:37:7A:9D:1A   |  1616 | 3612
 54:B8:00:0A:49   |  1696 | 3612
 B0:B2:DC:00:05   |  1730 | 3612
 00:16:FA:D0:BE   |   300 | 4094
 28:28:5D:ED:B4   |  1640 | 3612
 00:17:7C:76:99   |  1622 | 3612
 28:28:5D:94:78   |  1704 | 3612
 48:EE:00:0C:95   |  1630 | 3612
 48:EE:00:0C:BF   |  1628 | 3612
 00:17:7C:80:7C   |  1732 | 3612
 E8:CC:18:62:4B   |  1736 | 3612
 00:17:7C:61:C2   |  1596 | 3612
 00:25:5E:3F:E7   |  1716 | 3612
 CC:5D:4E:26:E8   |  1706 | 3612
 0C:D2:B5:5F:62   |  1632 | 3612
 28:28:5D:F4:00   |  1680 | 3612
 6C:72:20:EE:A8   |  1594 | 3612
 E8:37:7A:9D:00   |  1734 | 3612
 CC:5D:4E:26:E2   |  1698 | 3612
 0C:D2:B5:63:51   |  1710 | 3612
>>>

---

for line in output.split('\n')[4:]:
    line = line.split('|')
    if len(line) == 8:
        mac, bport, vlan = map(lambda x: x.strip(), line[:3])
        mac_address = mac2norm(mac)
        print('{:^17} | {: >5} | {: >4}'.format(mac_address, bport, vlan))

could be also

for line in output.split('\n')[4:-4]:
    line = line.split('|')
    mac, bport, vlan = map(lambda x: x.strip(), line[:3])
    mac_address = mac2norm(mac)
    print('{:^17} | {: >5} | {: >4}'.format(mac_address, bport, vlan))