Script for gathering currency values every X minutes, and saving them to text files for conky usage

conky exchange

#!/bin/python3

import requests as req
from lxml import html
from time import gmtime, strftime
import json

OUTPUT_FILE_USD = '/home/icebox/.config/conky/exchange/usd.txt'
OUTPUT_FILE_EURO = '/home/icebox/.config/conky/exchange/euro.txt'
OUTPUT_FILE_BTC = '/home/icebox/.config/conky/exchange/btc.txt'
OUTPUT_FILE_ETH = '/home/icebox/.config/conky/exchange/eth.txt'
UPDATE_EVERY = 60 			# x minutes


def update():
    print ('updating ...')
    # euro / usd
    r = req.get('http://www.cursbnr.ro/', headers={'User-Agent' : 'Mozilla/5.0 (X11; Linux x86_64; rv:55.0) Gecko/20100101 Firefox/55.0'})
    tree = html.fromstring(r.text)

    euro = tree.xpath('//div[@class="currency-value"]/div[@class="value"]')[0].text
    usd = tree.xpath('//div[@class="currency-value"]/div[@class="value"]')[1].text
	
    # btc
    r = req.get('https://blockchain.info/ticker')
    js = json.loads(r.text)
    btc = '1 BTC = {} USD'.format(int(js['USD']['last']))
    
    # eth
    r = req.get('https://min-api.cryptocompare.com/data/price?fsym=ETH&tsyms=USD')
    js = json.loads(r.text)
    eth = '1 ETH = {} USD'.format(int(js['USD']))
	
    # persist
    with open(OUTPUT_FILE_USD, 'w') as f:
        f.write(usd)
    with open(OUTPUT_FILE_EURO, 'w') as f:
        f.write(euro)
    with open(OUTPUT_FILE_BTC, 'w') as f:
        f.write(btc)
    with open(OUTPUT_FILE_ETH, 'w') as f:
        f.write(eth)
	
    # print in UI
    print (strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime()))
    print (usd)
    print (euro)
    print (btc)
    print (eth)
    print ('---------------------------')
	
def main():
    from time import sleep
    while True:
        update()
        sleep(UPDATE_EVERY * 60)
	
if __name__ == "__main__":
    main()