Thomas Jollans wrote: > On 04/06/17 09:52, Rustom Mody wrote: >> On Sunday, June 4, 2017 at 12:45:23 AM UTC+5:30, Jon Forrest wrote: >>> I'm learning about Python. A book I'm reading about it >>> says "... a string in Python is a sequence. A sequence is an ordered >>> collection of objects". This implies that each character in a string >>> is itself an object. >>> >>> This doesn't seem right to me, but since I'm just learning Python >>> I questioned the author about this. He gave an example the displays >>> the ids of string slices. These ids are all different, but I think >>> that's because the slicing operation creates objects. >>> >>> I'd like to suggest an explanation of what a sequence is >>> that doesn't use the word 'object' because an object has >>> a specific meaning in Python. >>> >>> Am I on the right track here? >> >> Its a good sign that you are confused >> If you were not (feeling) confused, it would mean you are actually more >> so… Following is not exactly what you are disturbed by... Still closely >> related >> >>>>> s="a string" >>>>> s[0] >> 'a' >>>>> s[0][0] >> 'a' >>>>> s[0][0][0][0][0] >> 'a' > > Also: > >>>> s[0] is s[0][0][0][0][0][0][0] > True >>>>
However, this is an implementation detail: >>> def is_cached(c): ... return c[0] is c[0][0] ... >>> is_cached(chr(255)) True >>> is_cached(chr(256)) False -- https://mail.python.org/mailman/listinfo/python-list
