9.9. Lists and strings¶
A string is a sequence of characters and a list is a sequence of values,
but a list of characters is not the same as a string. To convert from a
string to a list of characters, you can use
list is the name of a built-in function, you should
avoid using it as a variable name. I also avoid the letter
“l” because it looks too much like the number “1”.
So that’s why I use “t”.
list function breaks a string into individual letters.
If you want to break a string into words, you can use the
Once you have used
split to break the string into a list of
words, you can use the index operator (square bracket) to look at a
particular word in the list.
You can call
split with an optional argument called a
delimiter that specifies which characters to use as
word boundaries. The following example uses a hyphen as a delimiter:
join is the inverse of
split. It takes a list
of strings and concatenates the elements.
join is a string
method, so you have to invoke it on the delimiter and pass the list as a
In this case the delimiter is a space character, so
puts a space between words. To concatenate strings without spaces, you
can use the empty string, “”, as a delimiter.