is it an issue ?

[PGDataHome]

It seems i cannot do some elementary parsing

is it me ? or ?

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#!/bin/env python

import asyncio
from bite import Parser, CharacterSet, Combine, Group, Literal, parse_bytes, Suppress, Opt, ZeroOrMore

upper_case= CharacterSet(b'ABCDEFGHIJKLMNOPQRSTUVWXZ')

lower_case= CharacterSet(b'abcdefghijklmnopqrstuvwxz')

upper_case= CharacterSet(bytes(range(ord(b'A'),1+ord(b'Z'))))
lower_case= CharacterSet(bytes(range(ord(b'a'),1+ord(b'z'))))

digit = CharacterSet(b'0123456789')
digits = digit[1, ...]

integer = Combine(digits)
letter=lower_case|upper_case
char=letter|digit

ident = Combine(letter + (char | '_')[0, ...])

obj = parse_bytes( ident, "un")
result = asyncio.run( obj )
print(result

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Input: 'un'
^ location of error