import urllib.request
import json
f = urllib.request.urlopen("https://poloniex.com/public?command=return24hVolume").read()
json_data = json.dumps(f)
z = json.loads(json_data)
print(z[BTC_1CR])

  import urllib.request
import json
f = urllib.request.urlopen("https://poloniex.com/public?command=return24hVolume").read()
z = json.loads(f)
print(z[BTC_1CR])