Steven D'Aprano wrote:
> Because 0 always means the start of the string, how do you slice to the
> end? You can use the length of the string (in this case, 7) or you can
> leave the ending position blank, and it defaults to the length of the
> string:
For completeness, there's a third option, None, which is equivalent to a
missing value:
>>> "Machine!"[None:None]
'Machine!'
Sometimes this is even moderately useful:
>>> def clip(s, n):
... return s[:-n or None]
...
>>> for i in reversed(range(5)):
... print(i, clip("Machine!", i))
...
4 Mach
3 Machi
2 Machin
1 Machine
0 Machine!
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