Replace First

Replace First

Elementary

In a given sequence the first element should become the last one. An empty sequence or with only one element should stay the same.

example

Input: List.

Output: List or another Iterable (tuple, iterator, generator).

Examples: 

assert replace_first([1, 2, 3, 4]) == [2, 3, 4, 1]
assert replace_first([1]) == [1]
assert replace_first([]) == []
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oduvan
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