Python: Convert a byte array back to list of int

Question

I can convert a list of ints into a byte array with the following:

bytes([17, 24, 121, 1, 12, 222, 34, 76])
Out[144]: b'\x11\x18y\x01\x0c\xde"L'
bytes([1, 2, 3])
Out[145]: b'\x01\x02\x03'

What I want now is to get the byte array string back to its original list. Is there an easy python function to do that? I found the following:

int.from_bytes(b'\x11\x18y\x01\x0c\xde"L', byteorder='big', signed=False)
Out[146]: 1231867543503643212

I am not quite sure what is happening here. How is the conversion happening and what does the output signify. So if anyone can provide some context or insight, I will be grateful

Stephen Rauch · Accepted Answer · 2019-11-11 03:19:33Z

11

You can convert the bytearray to a list of ints with list()

Test Code:

x = bytes([17, 24, 121, 1, 12, 222, 34, 76])
print(x)
print(list(x))

Results:

b'\x11\x18y\x01\x0c\xde"L'
[17, 24, 121, 1, 12, 222, 34, 76]

answered Nov 11, 2019 at 3:19

Stephen Rauch♦

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3 Comments

igorkf Over a year ago

Easier than I imagined

Fizi Over a year ago

Could you also explain what is happening in int.from_bytes if possible

Stephen Rauch Over a year ago

int.frombytes() builds an integer. It can be big if you pass lots of bytes.

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