| """Character sets.""" | |
| from __future__ import annotations | |
| class Charset: | |
| """Define character sets used in other classes.""" | |
| ALPHA = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' | |
| DIGIT = '0123456789' | |
| HEX_DIGIT = '0123456789ABCDEFabcdef' | |
| GEN_DELIMS = ':/?#[]@' | |
| SUB_DELIMS = "!$&'()*+,;=" | |
| UNRESERVED = ALPHA + DIGIT + '-._~' | |
| RESERVED = GEN_DELIMS + SUB_DELIMS | |
| VAR_START = ALPHA + DIGIT + '_' | |
| VAR_CHAR = VAR_START + '.' | |