def match_list(self, setting, value, context, attrs, metas):
"""Match a list of values with the given context.
returns a tuple containing number of matched and all values.
"""
matched = 0
for item in value:
if self.is_valid_item(setting, item, attrs, metas):
matched += 1
elif setting.required == ContextSetting.REQUIRED:
raise IncompatibleContext()
return matched, len(value)
def match_value(self, setting, value, attrs, metas):
"""Match a single value """
if value[1] < 0:
return 0, 0
if self._var_exists(setting, value, attrs, metas):
return 1, 1
elif setting.required == setting.OPTIONAL:
return 0, 1
else:
raise IncompatibleContext()
def migrate_context(context, _):
if context.foo == 13:
raise IncompatibleContext()
