text_plain_output_1.png
import itertools as it

import pandas as pd

train = pd.read_json('../input/train.json')
train['listing_id'] = train['listing_id'].apply(str)

feature_total = []
train['features'].apply(lambda x: feature_total.append(x))
feature_total = list(it.chain.from_iterable(feature_total))
len(feature_total)