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#------------------------------------------------------------------------------
# Copyright (c) 2013-2025, Nucleic Development Team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file LICENSE, distributed with this software.
#------------------------------------------------------------------------------
from atom.api import Validate, Value
class StrengthMember(Value):
""" A custom Atom member class that validates a strength.
The strength can be None, a number, or one of the strength strings:
'weak', 'medium', 'strong', or 'required'.
"""
__slots__ = ()
def __init__(self, default=None, factory=None):
super(StrengthMember, self).__init__(default, factory=factory)
self.set_validate_mode(Validate.MemberMethod_ObjectOldNew, 'validate')
def validate(self, owner, old, new):
if new is not None:
if not isinstance(new, (float, int)):
if new not in ('weak', 'medium', 'strong', 'required'):
msg = "A strength must be a number or 'weak', 'medium' "
msg += "'strong', or 'required'. Got %r instead." % new
raise TypeError(msg)
return new
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