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

Dirty hack for Python 2.7, I wouldn't recomend to use it:

import __builtin__

_orig_str = __builtin__.str

def my_str(obj):
    if isinstance(obj, (int, long)):
        return hex(obj)
    return _orig_str(obj)
__builtin__.str = my_str

import json 

data = {'a': [1,2,3], 'b': 4, 'c': 16**20}
print(json.dumps(data, indent=4))

Output:

{
    "a": [
        0x1,
        0x2,
        0x3
    ],
    "c": 0x100000000000000000000L,
    "b": 0x4
}

On Python 3 __builtin__ module is now builtins, but I can't test it (ideone.com fails with ImportError: libz.so.1 ...)