FunctionParser, ObjectAccessParser
]:
p.mappings = self.pre_exercise_mappings.copy()
# run parser
p.visit(getattr(self, tree_name))
# cache
self._parser_cache[cache_key] = p
return getattr(p, ext_attr)
# put a property getter on state for each parsed ast tree output.
# since the getter takes only one argument, self, partial functions
# are used to set all other arguments on getx
for s in ['student', 'solution']:
tree_name = s + '_tree'
for k, Parser in parser_dict.items():
setattr(State, s + '_' + k,
property(partial(getx, tree_name, Parser, 'out')))
# mappings from ObjectAccessParser
prop_oa_map = property(
partial(getx, tree_name, ObjectAccessParser, 'mappings'))
setattr(State, s + '_oa_mappings', prop_oa_map)
# mappings from FunctionParser
prop_map = property(partial(getx, tree_name, FunctionParser, 'mappings'))
setattr(State, s + '_mappings', prop_map)
# mappings for pre exercise code from FunctionParser
pec_prop_map = property(
partial(getx, 'pre_exercise_tree', FunctionParser, 'mappings'))
p = Parser()
# set mappings for parsers that inspect attribute access
if ext_attr != 'mappings' and Parser in [FunctionParser, ObjectAccessParser]:
p.mappings = self.pre_exercise_mappings.copy()
# run parser
p.visit(getattr(self, tree_name))
# cache
self._parser_cache[cache_key] = p
return getattr(p, ext_attr)
# put a property getter on state for each parsed ast tree output.
# since the getter takes only one argument, self, partial functions
# are used to set all other arguments on getx
for s in ['student', 'solution']:
tree_name = s+'_tree'
for k, Parser in parser_dict.items():
setattr(State, s+'_'+k, property(partial(getx, tree_name, Parser, 'out')))
# mappings from ObjectAccessParser
prop_oa_map = property(partial(getx, tree_name, ObjectAccessParser, 'mappings'))
setattr(State, s+'_oa_mappings', prop_oa_map)
# mappings from FunctionParser
prop_map = property(partial(getx, tree_name, FunctionParser, 'mappings'))
setattr(State, s+'_mappings', prop_map)
# mappings for pre exercise code from FunctionParser
pec_prop_map = property(partial(getx, 'pre_exercise_tree', FunctionParser, 'mappings'))
setattr(State, 'pre_exercise_mappings', pec_prop_map)
# State subclasses based on parsed output -------------------------------------