Python in a Nutshell, 2nd Edition

The string Module

The string module supplies functions that duplicate each method of string objects, as covered in Methods of String Objects. Each function takes the (plain or Unicode) string object as its first argument. Module string also supplies several useful plain-string attributes:

ascii_letters

The string ascii_lowercase+ascii_uppercase

ascii_lowercase

The string 'abcdefghijklmnopqrstuvwxyz'

ascii_uppercase

The string 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

digits

The string '0123456789'

hexdigits

The string '0123456789abcdefABCDEF'

letters

The string lowercase+uppercase

lowercase

A string containing all characters that are deemed lowercase letters: at least 'abcdefghijklmnopqrstuvwxyz', but more letters (e.g., accented ones) may be present, depending on the active locale

octdigits

The string '01234567'

punctuation

The string '!"#$%&\'( )*+,-./:;<=>?@[\\]^_'{|}~' (i.e., all ASCII characters that are deemed punctuation characters in the 'C' locale; does not depend on which locale is active)

printable

The string of those characters that are deemed printable (i.e., digits, letters, punctuation, and whitespace)

uppercase

A string containing all characters that are deemed uppercase letters: at least 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', but more letters (e.g., accented ones) may be present, depending on the active locale

whitespace

A string containing all characters that are deemed whitespace: at least space, tab, linefeed, and carriage return, but more characters (e.g., certain control characters) may be present, depending ...