import numpy as np
def hex2bin(hex):
    numpy = list(hex)
    array = np.array(numpy)
    output = np.array([])
    for i in range(array.size):
        slice = array[i:i+1]
        if slice == "0":
            result = "0000"
        if slice == "1":
            result = "0001"
        if slice == "2":
            result = "0010"
        if slice == "3":
            result = "0011"
        if slice == "4":
            result = "0100"
        if slice == "5":
            result = "0101"
        if slice == "6":
            result = "0110"
        if slice == "7":
            result = "0111"
        if slice == "8":
            result = "1000"
        if slice == "9":
            result = "1001"
        if slice == "A":
            result = "1010"
        if slice == "B":
            result = "1011"
        if slice == "C":
            result = "1100"
        if slice == "D":
            result = "1101"
        if slice == "E":
            result = "1110"
        if slice == "F":
            result = "1111"
        output = np.append(output, list(result))
    return output

def test(string):
        char = list(string)
        print(char)
    test("test")

File "/Users/internone/github/Dynamic-Document/Hex2Bin.py", line 4, in
    hex2bin
        numpy = list(hex)
    TypeError: 'builtin_function_or_method' object is not iterable