python string模块

• string.ascii_lowercase

='abcdefghijklmnopqrstuvwxyz'

• string.ascii_uppercase

='ABCDEFGHIJKLMNOPQRSTUVWXYZ'

• string.ascii_letters

='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'

• string.digits

='0123456789'

• string.hexdigits

='0123456789abcdefABCDEF'

• string.octdigits

='01234567'

• string.punctuation

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

• string.whitespace

空白符    space，tab，换行等

• string.printable

可打印字符，以上所有集合