def shift_by_1(x, pos, n):
tmp1 = x[pos]
for i in range(pos, n):
tmp2 = l[i + 1]
l[i + 1] = tmp1
tmp1 = tmp2
l = [-2, -1, 0, 1, 2, 3, -100] # [-2, -1, -1, 0, 1, 2, 3]
shift_by_1(l, 2, 6)
print(l)
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