string_cheatsheet.rst

Common string operations

Checks

method	examples
endswith / startswith	'hello world'.startswith('he') # -> True
isalnum / isalpha / isdigit / islower / isupper / isspace	'123'.isdigit() # -> True 'Hello World'.islower() # -> False

Searches

method	examples
count	'hello world'.count('l') # -> 3
find	'hello world'.find('l') # -> 2 'hello world'.find('t') # -> -1
index	Same as find but raises exception if can't find

Manipulations

Be aware that str is an immutable type. All the methods bellow return new string (no in place operations).

method	examples
lower / upper / title / capitalize / swapcase	'hello world'.title() # -> 'Hello World' 'hello world'.capitalize() # -> 'Hello world'
replace	'hello world'.replace('world', 'john') # -> 'hello john'
strip (/ rstrip / lstrip)	Removes spaces and new lines from the ends of a string

Split and join

method	examples
split (/ rsplit)	'hello world'.split() # -> ['hello', 'world'] 'hello, and welcome'.split(', ') # -> ['hello', 'and welcome']
splitlines	Similar to split('\n'). Read the docs for more info.
join	' '.join(['hello', 'world']) # -> 'hello world' '<br >'.join(['first line', 'second line']) # -> 'first line<br >second line'

Formatting

A blog post about string formatting

All you will ever need for formating a string.

pyformat.info

More string formatting info. Comparing old and new style formatting.

Further reading

Google educational resources

Basic information about string indexing, slicing and a bit further.