CODEWITHSUNDEEP
pythonc++stringhex
tomriddle_1234
tomriddle_1234

Reputation: 3213

How to convert hex into ascii hex string in python?

Hi I'm learning pySerial module, so the hex to ascii is its fundamental.

So far I have the following concepts.

Byte String: "\xde"

Byte Array: 

>>> bytearray('\xde')
bytearray(b'\xde')
>>> a = bytearray('\xde')
>>> a[0]
222
>>> hex(a[0])
'0xde'

Hex String: '\xde'

Hex: 0xde

Normal representation: de

Now what I need is Hex String to Hex and vice versa.

Also Hex or Hex String to Normal representation .

I wish I can have the simplest possible answer.

Update:

I think I got an initial answer other than string operation. But this looks really dirty.

>>> hex(int(binascii.hexlify('\xde'),16))
'0xde'

Upvotes: 1

Views: 1227

Answers (1)

Serge Ballesta
Serge Ballesta

Reputation: 149185

Let me re-write a little.

You have a byte (say b, with an integer value of 222 (in decimal) or de (in hexadecimal) or 276 in octal or 10111110 in binary.

Its hexadecimal string representation is '0xde'

The following initialisations are the same :

b = 222
b = 0xde

Here are the conversions (say s is a string, s='0xde', ie the hexadecimal string representation)

s = hex(b)
b = int(s, 16)

Edit per comment :

If you really want to be able to accept as input \xde as well as 0xde you can do :

b = int('0' + s[1:] if (s[0] == '\\') else s, 16)

or directly

b = int('0' + s[1:], 16)

if you are sure you will never get weird input

Upvotes: 1

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