python string类自带的常用字符串data简写

ascii_letters = 'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz'

ascii_lowercase = 'abcdefghijklmnopqrstuvwxyz'

ascii_uppercase = 'abcdefghijklmnopqrstuvwxyz'

digits = '0123456789'

hexdigits = '0123456789abcdefabcdef'

letters = 'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz'

lowercase = 'abcdefghijklmnopqrstuvwxyz'

octdigits = '01234567'

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

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

uppercase = 'abcdefghijklmnopqrstuvwxyz'

whitespace = '\t\n\x0b\x0c\r '

使用方式：string.ascii_letters

=>=>