>>> import string

>>> string.ascii_letters

'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'

>>> string.ascii_lowercase

'abcdefghijklmnopqrstuvwxyz'

>>> string.ascii_uppercase

'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

>>> string.digits

''

>>> string.hexdigits

'0123456789abcdefABCDEF'

>>> string.letters

'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'

>>> string.lowercase

'abcdefghijklmnopqrstuvwxyz'

>>> string.uppercase

'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

>>> string.octdigits

''

>>> string.punctuation

'!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~'

>>> string.printable

'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\x0b\x0c'

>>> string.whitespace

'\t\n\x0b\x0c\r