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String methods

Strings have built-in methods like .upper(), .split(sep) and .count(sub). split divides a string at a separator and returns a list of substrings. Methods always return a new value and never change the original string.

s.\text{split}(c)

splits

s

at character

c

, gives a list

s.\text{count}(t)

number of times

t

occurs in

s

Symbols

$s$	a string
$c$	separator
$t$	the substring counted

Example

"a,b,c".split(",") gives ['a', 'b', 'c'].

"termo".count("m") gives 1.

Strings are immutable: s.upper() creates a new string, it does not change s.

Practise functions and data structures for free →

← Dictionary (dict) · Mutable objects and references →

Part of Programming with Python: Functions and data structures.