# -*- coding: utf-8 -*-

from formencode.validators import UnicodeString
from formencode.api import Invalid

def valid_string(value, min=None, max=None, not_empty=True):
    try:
        UnicodeString(min=min, max=max, not_empty=not_empty
                ).to_python(value)
        return True
    except Invalid:
        return False