# FNAME = "ifconfig.txt"
FNAME = "ifconfig_u18.txt"
ADAPTERS = dict()

with open(FNAME) as fid:
    # for linenumber, line in enumerate(fid.readlines()):
    for linenumber, line in enumerate(fid):
        # macstr = "HWaddr" # "ether"
        macstr = "ether" # "ether"
        print(line)
        if ("lo" not in line) and ("tun" not in line):
            if line and line[0] != " ":
                infos = line.split()
                if infos:
                    adapter = infos[0]
            if macstr in line:
                idx = line.find(macstr)
                startidx = idx + len(macstr) + 1
                endidx = startidx + 17
                macaddr = line[startidx:endidx]
        ADAPTERS[adapter] = macaddr

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))
        print(i, adapter, mac)
        fid.write("Adapter: " +  adapter + ", MAC: " + mac_changed + "\n")