How can I edit/rename keys during json.load in python?

Question

I have a json file ( ~3Gb ) that I need to load into mongodb. Quite a few of the json keys contain a . (dot), which causes the load into mongodb to fail. I want to the load

Answer 1

You almost had it:

import json

def remove_dot_key(obj):
    for key in obj.keys():
        new_key = key.replace(".","")
        if new_key != key:
            obj[new_key] = obj[key]
            del obj[key]
    return obj

new_json = json.loads(data, object_hook=remove_dot_key) 

You were returning a dictionary inside your loop, so you'd only modify one key. And you don't need to make a copy of the values, just rename the keys.