Help required to print MAC addresses

[anna]

Wavic, Buran.... thanks for you valuable time and support and encouragement to learn python.
I am trying to parse output through below code, is this good way? but still stuck

data = iter(output.split('\n'))
try:
      for line in data:
          if "dishash all" in line:
          #skipping line with dishash all command
              next(data)
          if line == ' ':
          #skipping blank line
              next(data)
          else:
              for line in data.split('\n')[4:-2]:
                  data = [field.strip() for field in line.split('|')[:3]]
                  mac = [elm for elm in data[0].split() if elm]
                  if line == '':
                     #skipping last blank line
                     next(data)
                  if 'Total' in line:
                     #skipping line with Total number of MAC addresses
                     next(data)
                  else:
                      mac_addr = '{:0>2}:{:0>2}:{:0>2}:{:0>2}:{:0>2}:{:0>2}'.format(*mac)
                      bport, vlan = data[1:]
                      print("{:^23}\t{:^5}\t{:^5}".format(mac, bport, vlan))
except StopIteration:

Error:
Traceback (most recent call last):
  File "ecicollector-1.py", line 44, in <module>
    for line in data.split('\n')[4:-2]:
AttributeError: 'listiterator' object has no attribute 'split'