I am currently trying out slicing a string in Python and was confused about how exactly does Python interpret the term 'None' because it behaves rather conveniently when used but I am not sure of the process that goes on in the interpreter when we use it. I have no doubts about how to use slice, but about HOW it works. None of the questions I have visited (for example) explain what index does 'none' refer to for each case mentioned below. I got this question because I was playing around with negative indexing in Python; str="Python" print(str[-len(str):-1]) Will give us the output; Pytho If we try replacing the -1 with a 0 it obviously returns an empty string. However if we replace it with None, it will return the whole string str="Python" print(str[-len(str):]) Will give us the output Python Even when we do this str="Python" print(str[:]) It will return the whole string! I was wondering what Index does the 'None' refer to in each case above? Continue reading...
