import string

assert string.ascii_letters == "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
assert string.ascii_lowercase == "abcdefghijklmnopqrstuvwxyz"
assert string.ascii_uppercase == "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
assert string.digits == "0123456789"
assert string.hexdigits == "0123456789abcdefABCDEF"
assert string.octdigits == "01234567"
assert string.punctuation == "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~"
assert string.whitespace == " \t\n\r\x0b\x0c", string.whitespace
assert (
    string.printable
    == "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\x0b\x0c"
)

assert string.capwords("bla bla", " ") == "Bla Bla"

from string import Template

s = Template("$who likes $what")
r = s.substitute(who="tim", what="kung pow")
assert r == "tim likes kung pow"

from string import Formatter

f = Formatter()