def generator(n):     # n is the rows     list = [1]     print 1, '\n'     for i in xrange(1, n):              new_list = [0 for j in xrange(i+1)]         new_list[0] = 1         new_list[-1] = 1         for j in xrange(1, (i+2)/2):             new_list[j] = list[j-1] + list[j]         for j in xrange((i+1)/2, i+1):             new_list[j] = new_list[i-j]         list = new_list         for num in list:             print num,          print '\n'