How to use dot in field name?

Question

How to use dot in field name ?

I see error in example:

db.test2.insert({ \"a.a\" : \"b\" })

can\'t have . in field names [a.a]

Answer 1

def remove_dots(data):
    for key in data.keys():
        if type(data[key]) is dict: data[key] = remove_dots(data[key])
        if '.' in key:
            data[key.replace('.', '\uff0E')] = data[key]
            del data[key]
    return data

this recursive method replaces all dot characters from keys of a dict with \uff0E as suggested by Fisk