How do I fix AttributeError: 'bytes' object has no attribute 'encode'?

Question

This is my code z = (priv.to_string().encode('hex')) and I got this error:

"AttributeError: 'bytes' object has no attribute 'encode'"

looks like I missed something to show "encode" after the code:

z = (priv.to_string().

What is priv's type? Try str(priv) rather than priv.to_string() — ggrelet
– ggrelet, Commented Apr 16, 2019 at 6:15
it is a string, i put hex() after "z = (priv.to_string(). and after .encode this is my code now and it's fine "z = (priv.to_string().hex().encode(hex()) but i have syntax error in my next code print, here is my next code "print("private key = "+z+" " + "address = 0x"+address)" — cristina parker
– cristina parker, Commented Apr 16, 2019 at 6:30

glhr · Accepted Answer · 2019-04-16 06:30:27Z

12

Two problems here:

you're using priv.to_string() (which isn't a built-in method) instead of str(priv)
'hex' has been removed as an encoding in Python 3, so with str(priv).encode('hex') you'll get the following error: LookupError: 'hex' is not a text encoding; use codecs.encode()to handle arbitrary codecs

However, since Python 3.5, you can simply do:

priv.hex()

with priv being a byte string.

Example:

priv = b'test'
print(priv.hex())

Output:

74657374

answered Apr 16, 2019 at 6:24

glhr

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1 Comment

I modified my code: "z = str(priv.to_string().hex().encode())" and it works! thanks a lot!

jcomeau_ictx · Accepted Answer · 2019-12-25 02:51:05Z

2

on Python3 systems older than version 3.5, you can from binascii import hexlify and use hexlify(priv.to_string())

answered Dec 25, 2019 at 2:51

jcomeau_ictx

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