How to check if 2 dicts are equal except some fields?

Question

There are two dicts: old and updated. I wanna to check if they are equal, except status, latitude and longitude keys.

assert old_dict['status'] != updated_dict['status']
assert old_dict['latitude'] != updated_dict['latitude']
assert old_dict['longitude'] != updated_dict['longitude']

for field in ('status', 'latitude', 'longitude'):
    updated_dict.pop(field)
    old_dict.pop(field)

assert old_dict == updated_dict

What is the more pythonic way to do this?

Answer 1

A bit of an unorthodox suggestion, but hear me out:

differing = {"status", "latitude", "longitude"}
assert all(
    (old_dict[key] != updated_dict[key]) == (key in differing)
    for key in old_dict
)

For every key, we assert that the values differ if and only if the key is one of the differing keys.