At
https://docs.python.org/3.4/library/stdtypes.html#sequence-types-list-tuple-range
it states:
"s.insert(i, x) inserts x into s at the index given by i (same as s[i:i] = [x])"
I find this confusing. First, at the interpreter, whenever I type in:
>>> things
[0, 'Hmm...', 3, 'WhackABunny', 6, '?']
>>> things[-1:-1]
[]
>>> things[0:0]
[]
I always get an empty list, which is actually what I was expecting, so
I do not see how s[i:i] can ever equal [x].
The second thing I find puzzling is the docs say x is inserted at
position i, while in the interpreter:
>>> help(list.insert)
Help on method_descriptor:
insert(...)
L.insert(index, object) -- insert object before index
The "...insert object before index" makes sense to me, but "...inserts
x into s at the index given by i..." does not because:
>>> things.insert(-1, 'What the heck?!?')
>>> things
[0, 'Hmm...', 3, 'WhackABunny', 6, 'What the heck?!?', '?']
"...at the index..." to me would mean that 'What the heck?!?' should
become the last item in the list. Again, the interpreter help gave
what I was expecting.
Am I just being dense or are the docs in this instance confusing?
--
boB
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