Is there a slice equivalent to "append" in Python?

Question

To prepend to a list, I use the_list[0:0]. But with slice appending:

• [-0:-0] doesn't work.
• [::-1][0:0] doesn't work.
• And obviously [-1:-1] won't work.
• [len(the_list), len(the_list)] doesn't count -- looking for just numbers here

Example:

results = [3,1,0]
results[-1:-1] = [3]
print(results)

>>> [3,1,3,0]

results[-0:-0] = 5
print(results)

>>> [5,3,1,3,0]

results = [3,1,0]
results[-1:-1] = [3]
print(results)

>>> [3,1,3,0]

results[-0:-0] = 5
print(results)

>>> [5,3,1,3,0]

Thoughts?

Answer 1

The slice that starts after the last element is len(…):.

results[len(results):] = [3]

but why, when there are += and extend?

results += [3]
results.extend([3])