from baseconv import BaseConverter
from string import ascii_lowercase, ascii_uppercase

# We have to create this collection ourselves because we want uppercase then
# lowercase, and string.ascii_letters is lowercase then uppercase.
chars = ascii_uppercase + ascii_lowercase
conv = BaseConverter(chars)

class AbcIdConverter:
    regex = '[a-zA-Z]+'

    def to_python(self, value: str) -> int:
        return int(conv.decode(value))

    def to_url(self, value: int) -> str:
        return conv.encode(value)