At i3blocks: [btc] command=$HOME/.i3/i3-btcprice.py interval=1 separator=false

i3-btcprice.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import time
import urllib2
import json

last_price=10.0
ml="-"
def get_data2(web_site_api, currency_name):
        global last_price
        global ml
        pric=0
        ml="↑"
        webdata = urllib2.urlopen(web_site_api).read()
        decodejson = json.loads(webdata)
        last_price=float(decodejson['ticker']['last'])

        webdata = urllib2.urlopen(web_site_api).read()
        decodejson = json.loads(webdata)
        pric=float(decodejson['ticker']['last'])
        if pric < last_price:
                ml="↓"
        print time.strftime('%X',time.localtime(time.time())) + " %4.0f%sCNY" % (pric,ml)

#main
if __name__ == "__main__":
        try:
                get_data2("https://www.okcoin.com/api/ticker.do?symbol=btc_cny", "BTC")  #btc/cny
        except:
                print time.strftime('%X',time.localtime(time.time())) + " ----  CNY"