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

Octal and hexadecimal formats are not supported in JSON.

You could use YAML instead.

>>> import json, yaml
>>> class hexint(int):
...     def __str__(self):
...         return hex(self)
...
>>> json.dumps({"a": hexint(255)})
'{"a": 0xff}'
>>> yaml.load(_)
{'a': 255}

Or without wrapping integers:

import yaml

def hexint_presenter(dumper, data):
    return dumper.represent_int(hex(data))
yaml.add_representer(int, hexint_presenter)

print yaml.dump({"a": 255}), # -> {a: 0xff}
assert yaml.load('{a: 0xff}') == {"a": 255}