def price_sparkline(market, crop, unit):
prices = list(Transaction.price_history_for(market, crop, unit)[:10])
if prices:
last_price = prices[-1]
average = mean(prices)
values = [deviation(price, average) for price in prices]
return sparkline(values, "%s ZMK" % int(last_price))
else:
return sparkline([], "No transactions yet")
def average_crop_price(market, crop, unit):
prices = list(Transaction.price_history_for(market, crop, unit)[:10])
return floatformat(mean(prices), 2)
