ccxt library in Python to fetch OHLCV data

fetchOHLCV.py

#!/usr/bin/python
import ccxt
import time

binance = ccxt.binance()
if binance.has['fetchOHLCV']:
    for symbol in binance.load_markets():
        time.sleep (binance.rateLimit / 1000) # time.sleep wants seconds
        print(symbol, binance.fetch_ohlcv(symbol, '1d')) # one day