toHex for a list

import binascii

def toHex(data):
    data = list(data)
    dataHex = []
    for i in data:
        i = i.encode('utf-8')
        i = binascii.hexlify(i)
        dataHex.append(str(i, 'ascii'))
    return dataHex

d = open('topsecret.txt', 'r')
data = d.read()
print(len(data))
d.close()
data = toHex(data)
print(data)