f = open("testtour.txt", 'r')
starttour = []
i = 0;
for line in f:
    starttour.append(line.strip().split(' '))
    i = i+1
f.close()

def twoopt(tour,i,j):
    tourCopy = tour
    tourCopy[i+1:j+1]= reversed(tourCopy[i+1:j+1])

    return tourCopy


print(twoopt(starttour, 0, 5))
print(starttour)