3 ways to circularly shift Python sequences

The following is a recommendation for three methods of circular shifting of Python sequences. It has a good reference value and I hope it will be helpful to everyone.

The first method: The characteristic is that it is direct and easy to understand. The disadvantage is that it is slow and can only achieve circular left shift.

def demo(lst, k):
  temp = lst[:]
  for i in range(k):
    temp.append(temp.pop(0))
  return temp

The second method: is characterized by fast speed and adaptive circular left shift (k> 0) and right shift (k<0), the disadvantage is that it involves algorithms and is not easy to understand.

def demo(lst, k):
  x = lst[:k]
  x.reverse()
  y = lst[k:]
  y.reverse()
  r = x+y
  return list(reversed(r))

The most Pythonic ultimate method: Use slices, simple and easy to understand, fastest, and can be used simultaneously Implement circular left shift (k>0) and right shift (k<0).

def demo(lst, k):
  return lst[k:] + lst[:k]

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