Python3 - How to convert a string to hex

Question

I am trying to convert a string to hex character by character, but I cant figure it out in Python3.

In older python versions, what I have below works:

test = "This is a test"
for c in range(0, len(test) ):
   print( "0x%s"%string_value[i].encode("hex") )

But with python3 I am getting the following error:

LookupError: 'hex' is not a text encoding; use codecs.encode() to handle arbitrary codecs.

Can anyone help to tell me what the conversion would be in python3.

Thanks in advance

Answer 1

In python 3x Use binascii instead of hex:

>>> import binascii
>>> binascii.hexlify(b'< character / string>')

Answer 2

To print:

for c in test:
    print(hex(ord(c)))

To convert:

output = ''.join(hex(ord(c)) for c in test)

or without the '0x' in output:

output = ''.join(hex(ord(c))[2:] for c in test)

Answer 3

How about:

>>> test = "This is a test"    
>>> for c in range(0, len(test) ):
...     print( "0x%x"%ord(test[c]))
... 
0x54
0x68
0x69
0x73
0x20
0x69
0x73
0x20
0x61
0x20
0x74
0x65
0x73
0x74