I'm trying to understand regular expression operations, string slicing, and strings in Python.
String slicing using .start() and .end() results in the expected substring, and if I go for a single character from a string using .start() the resulting character is as expected, but if I go for a single character from a string using the .end() index, it doesn't result in the expected character.
I understand that lists (including strings) begin with element zero, but why are exceptions to this rule the stop index of a string slice and the re Match .end() index?
>>> import re
>>> m = re.search("bake","123bake456")
>>> m
<re.Match object; span=(3, 7), match='bake'>
>>> m.span()
(3, 7)
>>> m.start()
3
>>> m.end()
7
>>> "123bake456"[m.start():m.end()]
'bake'
>>> "123bake456"[m.start()]
'b'
>>> "123bake456"[m.end()]
'4'
The slice goes up to the ending index but does not include it. i.e. a span of (3, 7) includes index 6, but not 7. Similar to how range(1,100) would go 1-99 but not include 100.