如何将列表和字典转换为字节？

Question

I would like to convert lists and dictionaries into bytes. I know that you can convert an string into bytes by doing:

"string".encode()

Answer 1

You can use bytearray for this.

nums = [1, 2, 3]
val = bytearray(nums)

print(val)

I think this will work fine. For dictionary and list you can also use the following code. I prefer this:

import json

d = {"a": "sldjkf", "b": "asod"}
s = json.dumps(d)
binary = ' '.join(format(ord(l), 'b') for l in s)

Answer 2

Use numpy's tobytes :

l = [0.1, 1.0, 2.0]
A = np.array(l)
A.tobytes()

Result:

b'\x01\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00'

For dictionaries you can use the method mentioned ( json.dumps ) in the other answers to convert the dict into string and then into bytes.

Answer 3

For list: you can use bytes() function from python.

For dictionaries: Convert dictionary to bytes and back again python?