Python what is '*' used for

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Unpacking, extended unpacking, and nested extended unpacking 3 answers

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This is called the "splat" operator. For more information on it, see the Python documentation on it.

What it's basically doing is this:

print(reversed(binary)[0], reversed(binary)[1], ..., sep='')

Essentially, it uses the array elements as arguments instead of passing the array as a single argument itself.

>>> lst = [1, 2, 3]
>>> print(lst)  # equivalent to `print([1, 2, 3])'
[1, 2, 3]
>>> print(*lst) # equivalent to `print(1, 2, 3)'
1 2 3
>>> print(reversed(lst))
<list_reverseiterator object at 0x7f4863ae4a20>
>>> print(*reversed(lst))
3 2 1

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