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# Mon:0, Tue:1, Wed:2, Thr:3, Fri:4, Sat:5, Sun:6
import datetime
def datestr2num(s):
    return datetime.datetime.strptime(s, "%d-%m-%Y").date().weekday()
dates, close=np.loadtxt('data.csv', delimiter=',', usecols=(1,6), converters={1: datestr2num}, unpack=True)
print "Dates =", dates
averages = np.zeros(5)