How to print integers as hex strings using json.dumps() in Python

Question

Currently I am using the following code to print a large data structure

print(json.dumps(data, indent=4))

I would like to see all the integ

Answer 1

You can't override the existing encoder for integers...but there might be another way to get what you want. What about something like this:

import json
import re

data = {'test': 33, 'this': 99, 'something bigger':[1,2,3, {'a':44}]}  
s = json.dumps(data, indent=4)
print(re.sub('(\d+)', lambda i: hex(int(i.group(0))),s))

Results in:

{
    "test": 0x21,
    "this": 0x63,
    "something bigger": [
        0x1,
        0x2,
        0x3,
        {
            "a": 0x2c
        }
    ]
}

Note: This isn't especially "robust" (fails on numbers embedded in strings, floats, etc.), but might be good enough for what you want (You could also enhance the regex here so it would work in a few more cases).