FNAME = "ifconfig.txt"
  
  ADAPTERS = dict()
  
  with open(FNAME) as fid:
      for linenumber, line in enumerate(fid):
          if line[0] is not " ":
              # if ("ether" in line) or ("HWaddr" in line):
              #     print(line)
              infos = line.split()
              if(infos and
                 "lo" not in infos[0] and
                 "tun" not in infos[0]):
                  adapter, mac = infos[0], infos[4]
                  # print(linenumber, adapter, mac)
                  print(infos)
                  ADAPTERS[adapter] = mac
  
  FNAME_BASE = FNAME[:FNAME.rfind(".txt")]
  FNAME_OUT =  FNAME_BASE + "_adapters.txt"
  FNAME_OUT2 = FNAME_BASE + "_adapters_changed.txt"
  
  with open(FNAME_OUT, "w") as fid:
      for adapter, mac in ADAPTERS.items():
          fid.write("Adapter: " +  adapter + ", MAC: " + mac + "\n")
  
  BASEMAC = "01:23:45:ff:00:"
  with open(FNAME_OUT2, "w") as fid:
      for i, (adapter, mac) in enumerate(ADAPTERS.items()):
          mac_changed = BASEMAC + "%02x" %(i+1)
          mac_changed = BASEMAC + "{0:02x}".format((i+1))
          fid.write("Adapter: " +  adapter + ", MAC: " + mac_changed + "\n")