Total recursive dict len counter

recursive_dict_counter.py

# https://stackoverflow.com/a/35428134


def _counter(d):
    # how many keys do we have?
    yield len(d)

    # stream the key counts of our children
    for v in iter(d.values()):
        if isinstance(v, dict):
            for x in _counter(v):
                yield x

                
def count_faster(d):
    return sum(_counter(d))