def NotConvertable(klass, typename): return ValueErrorType.occur('not convertable to %s' % typename)
def MaybeSubstringNotFound(klass): if not klass.raise_uncertain: return None return ValueErrorType.maybe('substring not found')
def MaybeTableInvalid(klass): if not klass.raise_uncertain: return None return ValueErrorType.maybe('translate table invalid')
def MaybeNotRemovable(klass): if not klass.raise_uncertain: return None return ValueErrorType.maybe('cannot remove an entry')
def MaybeElementNotRemovable(klass): if not klass.raise_uncertain: return None return ValueErrorType.maybe('empty container')
def MaybeElementNotFound(klass): if not klass.raise_uncertain: return None return ValueErrorType.maybe('element not found')
def MaybeNotConvertable(klass, typename): if not klass.raise_uncertain: return None return ValueErrorType.maybe('not convertable to %s' % typename)
def NotUnpackable(klass, obj): if klass.is_ignored(obj): return None return ValueErrorType.occur('tuple cannot be unpacked: %s' % obj)