# The standard string repr for dicts is hard to read:
my_mapping = {'a': 23, 'b': 42, 'c': 0xc0ffee}

# The "json" module can do a much better job:
import json
print(json.dumps(my_mapping, indent=4, sort_keys=True))
{
    "a": 23,
    "b": 42,
    "c": 12648430
}

# Note this only works with dicts containing
# primitive types (check out the "pprint" module):
#json.dumps({all: 'yup'})
#TypeError: keys must be a string