How to add extra length to integer array in Python

Question

I have a measurement device which is being read by Python into an integer array. How do I append the array with an extra 10 integer "locations"? I have tried ".extend", ".append", "+", and have not been able to make any of them work.

Summary Code:

    DataByte = []
    DataByte = Read_Instrument() # This fills DataByte

When I use:

    DataByte.append(1)

I get 'Array[int]' object has no attribute 'append'

If I try:

    DataByte.extend([1])

I get 'Array[int]' object has no attribute 'extend'

If I try:

    DataByte = DataByte + (1)

I get error message saying I can't combine integer with string

Answer 1

If you want to append 10 elements to your list :

>>> [1,2,3]+[None]*10
[1, 2, 3, None, None, None, None, None, None, None, None, None, None]