converting large int list to byte string python

Question

I need to convert int list into a byte string but I don't know how. I can't use bytes() because the values are too large.

bytes([152710136, 76354857, 38177353, 2252736081, 1126368238])

I get this error:

ValueError: bytes must be in range(0, 256)

The expected value is:

b'\xc4\xb7\x86\x17\xcd'

Specify what "byte string" means. Ascii-coded bytes as textual representation? — Michael Butscher
– Michael Butscher, Commented Jan 21, 2018 at 16:50
If the values are less than 256 you can use bytes(list) and it will give you the result. — avan989
– avan989, Commented Jan 21, 2018 at 16:56

Austin · Accepted Answer · 2018-01-21 17:11:21Z

5

You can use .to_bytes to return an array of bytes representing an integer. Note: This works only in python 3.1 and above.

For example:

>>> (1024).to_bytes(2, byteorder='big')
b'\x04\x00'

answered Jan 21, 2018 at 17:11

Austin

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Comments

Samuel · Accepted Answer · 2021-01-02 21:15:28Z

1

I needed to use struct.unpack() and it accepts a byte string rather than a list of ints. I was able to convert my list of ints to a byte string with:

bytearray(mylist)

Tested on python 2.7.

answered Jan 2, 2021 at 21:15

Samuel

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