How to limit the number of float digits JSONEncoder produces?

Question

I am trying to set the python json library up in order to save to file a dictionary having as elements other dictionaries. There are many float numbers and I wo

Answer 1

Doesn't answer this question, but for the decoding side, you could do something like this, or override the hook method.

To solve this problem with this method though would require encoding, decoding, then encoding again, which is overly convoluted and no longer the best choice. I assumed Encode had all the bells and whistles Decode did, my mistake.

# d = dict()
class Round7FloatEncoder(json.JSONEncoder): 
    def iterencode(self, obj): 
        if isinstance(obj, float): 
            yield format(obj, '.7f')


with open('test.json', 'w') as f:
    json.dump(d, f, cls=Round7FloatEncoder)