Python : strings

Question

please explain the following:
Strings are also immutable, meaning that after a string is created, an individual characters of the string cannot be modified. provide example

Answer 1

It means you can't change "homework" to "letothersdoitforme"

Answer 2

You can create a string, by example:
s = "hello"

but you cannot modify an individual character, this generates an error:
s[1] = "a"
TypeError: 'str' object does not support item assignment

but it is possible to modify the complete chain:
s = "bye"
or
s = s[0] + "a" + s[2:]