Python: for and if loop

[salwa17]

@deanhystad : I think that you are right about my problem with the binary2 function. Its the loop which causes problem.

How can I resolve this problem plz ?

Func_code contains certainely 3 and 1 values. He is its code:

    
   def func_code(s):
    r = []
    for p in s:
        if p.haslayer('ModbusADURequest'):
            try:
                if p['ModbusADURequest'][1].funcCode == 3:
                    r.append(3)
                elif p['ModbusADURequest'][1].funcCode == 1:
                    r.append(1)
            except AttributeError:
                pass