How to do a Circular left shift for a byte in python

Question

I am trying to do a left-byte shift on a list. But it is not working properly.

def left_byte_shift(w3):
    temp = w3
    x=0
    a = (len(w3)-1) 
    print("a=",a)
    
    for i in reversed(range(len(w3))):
        if i == a: #3 
            w3[x] = temp[a]
        else:    #2,1,0

            print(w3[i],temp[i+1])
            w3[i] = temp[i+1]
            print(w3[i],temp[i+1],'\n\n')

    return w3 

Answer 1

I think this is what you're looking for?

w = [1, 2, 3, 4]
w[-1], w[:-1] = w[0], w[1:]
print(w) # [2, 3, 4, 1]

It's not exactly a left "byte" shift, more like a left element shift.