import json
import csv
import io


data_json = io.open('tweets.json', mode='r', encoding='utf-8').read()
data_python = json.loads(data_json)
csv_out = io.open('tweets_out_utf8.csv', mode='w', encoding='utf-8')


fields = u'created_at,text,screen_name,followers,friends,rt,fav'
csv_out.write(fields)
csv_out.write(u'n')

for line in data_python:

    row = [line.get('created_at'),
           '"' + line.get('text').replace('"','""') + '"',
           line.get('user').get('screen_name'),
           str(line.get('user').get('followers_count')),
           str(line.get('user').get('friends_count')),
           str(line.get('retweet_count')),
           str(line.get('favorite_count'))]

    row_joined = u','.join(row)
    csv_out.write(row_joined)
    csv_out.write(u'n')

csv_out.close()