I haven't seen anyone else mention it, so I will point out: interoperability with C. In C, strings are NUL-terminated. PyStringObject instances do (or used to) have NUL-terminated strings in them. According to unicodeobject.h, that seems still to be the case:typedef struct {/* There are 4 forms of Unicode strings:...wchar_t *wstr; /* wchar_t representation (null-terminated) */} PyASCIIObject;and:typedef struct {PyASCIIObject _base;Py_ssize_t utf8_length; /* Number of bytes in utf8, excluding the* terminating \0. */char *utf8; /* UTF-8 representation (null-terminated) */Py_ssize_t wstr_length; /* Number of code points in wstr, possible* surrogates count as two code points. */} PyCompactUnicodeObject;The raw string is NUL-terminated, precisely so copying isn't required in most cases before passing to C. Making s[1:-1] a view onto the underlying string data in s would require you to copy the data when you want to pass the view into C so you could tack on that NUL. That happens a lot, so it's likely you wouldn't save much work, and result in a lot more churn in Python's memory allocator. The only place you could avoid the copy is if the view you are dealing with is a strict suffix of s.Skip--
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