Pythonで為替レートをCSVファイルに書き出す

$ sudo pip3 install pandas
$ sudo pip3 install pandas-datareader
$ sudo pip3 install matplotlib

# -*- coding:utf-8 -*-
#!/usr/bin/env python3


import datetime
import pandas
import pandas_datareader.data as web


if __name__ == '__main__':
    currency = {
	'ドル/円': 'DEXJPUS',
	'ユーロ/ドル': 'DEXUSEU',
	'ポンド/ドル': 'DEXUSUK',
    }

    start = datetime.datetime(2018, 3, 1)
    end = datetime.datetime(2018, 3, 31)

    data = web.DataReader(currency.values(), 'fred', start, end)
    data.columns = list(currency.keys())
    print(data)
    data.to_csv('currency.csv')