Python String Methods
These methods are defined for all instances of the built-in str type.
Contents
Methods
Method Name |
Description |
Example |
capitalize |
|
str.capitalize() |
casefold |
Convert to lowercase |
str.casefold() |
center |
|
str.center(width, ' ') |
count |
|
str.count(sub, 0, len(sub)-1) |
encode |
|
str.encode(encoding='utf-8', errors='strict') |
endswith |
|
str.endswith(suffix0, len(sub)-1) |
expandtabs |
|
str.expandtabs(tabsize=8) |
find |
|
str.find(sub, 0, len(sub)-1) |
format |
|
str.format(**kwargs) |
format_map |
|
str.format_map(kwargs) |
index |
|
str.index(sub, 0, len(sub)-1) |
isalnum |
|
str.isalnum() |
isalpha |
|
str.isalpha() |
isascii |
|
str.isascii() |
isdecimal |
|
str.isdecimal() |
isdigit |
|
str.isdigit() |
isidentifier |
|
str.isidentifier() |
islower |
|
str.islower() |
isnumeric |
|
str.isnumeric() |
isprintable |
|
str.isprintable() |
isspace |
|
str.isspace() |
istitle |
|
str.istitle() |
isupper |
|
str.isupper() |
join |
|
str.join(iterable) |
ljust |
|
str.ljust(width, ' ') |
lower |
Convert to lowercase |
str.lower() |
lstrip |
|
str.lstrip(line) |
maketrans |
|
|
partition |
|
str.partition(sep) |
removeprefix |
|
str.removeprefix(prefix) |
removesuffix |
|
str.removesuffix(suffix) |
replace |
|
str.replace(old, new, 1) |
rfind |
|
str.rfind(sub, 0, len(sub)-1) |
rindex |
|
str.rindex(sub, 0, len(sub)-1) |
rjust |
|
str.rjust(width[, fillchar]) |
rpartition |
|
str.rpartition(sep) |
rstrip |
|
str.rstrip(line) |
split |
|
str.split(sep=' ', maxsplit=1) |
splitlines |
|
str.splitlines() |
startswith |
|
str.startswith(prefix, 0, len(sub)-1) |
strip |
|
str.strip(line) |
swapcase |
|
str.swapcase() |
title |
|
str.title() |
translate |
|
str.translate(table) |
upper |
Convert to uppercase |
str.upper() |
zfill |
|
str.zfill(width) |
Casefolding
The upper, lower, and casefold methods are closely related. The major difference is that lower is reversible.
orig = ['ß', 'á', 'Á'] [o.upper() for o in orig] # ['SS', 'Á', 'Á'] [o.casefold() for o in orig] # ['ss', 'á', 'á'] [o.lower() for o in orig] # ['ß', 'á', 'á']