def createSignString(params):
    for (i, p) in enumerate(params):
        params[i] = p.upper()
    params = sorted(params)
    sign = ""
    for p in params:
        sign += p + "&"
    sign = sign[:-1]
    m = hashlib.md5()
    m.update(sign.encode('utf-8'))
    return m.hexdigest()

def placeOrder(apiid, price, quantity, symbol, ptype, timestamp, sign):
    r = requests.post('http://api.coinbene.com/v1/trade/order/place',
        data = {'apiid' : apiid,  'price' : price, 'quantity' : quantity,
                'symbol' : symbol, 'type' : ptype, 'timestamp' : timestamp, 'sign' : sign })
    print(r.text)

ts = int(round(time.time() * 1000))
tsstring = 'timestamp=' + str(ts)
apiidstr = 'apiid=' + str(180220233838457665082)
placeOrder(180220233838457665082, '0.000001', 1, 'PLAYETH', 'buy-limit', ts,
            createSignString(['symbol=playeth', 'price=0.000001', 'quantity=1', 'type=buy-limit',
            tsstring, apiidstr, 'secret=LOLNO']))