def find_matches(answer, attempt):
logger.debug('find_matches recieved answer=' + str(answer) + ' attempt=' +
str(attempt))
attempt_parsed = parse_webwork(attempt)
logger.debug('calling eval_parsed on on' + str(attempt_parsed))
attempt_tree = eval_parsed(attempt_parsed)
logger.debug('calling flatten on' + str(attempt_tree))
attempt_list = flatten(attempt_tree, 't')
logger.debug('attempt list:\n' + str(attempt_list))
answer_parsed = parse_webwork(answer)
logger.debug('calling eval_parsed on on' + str(answer_parsed))
answer_tree = eval_parsed(answer_parsed)
logger.debug('calling flatten on' + str(answer_tree))
answer_list = flatten(answer_tree, 'c')
logger.debug('answer list\n' + str(answer_list))
combined_list = sorted(answer_list + attempt_list, key=lambda x: x[0])
logger.debug('combined list\n' + str(combined_list))
Hits = find_Hits(combined_list)
logger.debug('Hits:\n' + str(Hits))
final_matches = find_dominating_hits(Hits, answer, attempt)
return final_matches
def answer_for_student(df, user_id, answer_tree):
'''
Evaluates an answer parse tree for a specific user
'''
user_vars = vars_for_student(df, user_id)
etree = eval_parsed(answer_tree, user_vars)
return etree
def answer_for_student(self, user_id):
user_vars = self.vars_for_student(user_id)
key = frozenset(user_vars.iteritems())
answer = self.answer_exps.get(key)
if answer:
return answer
else:
etree = eval_parsed(self.answer_ptree, user_vars)
self.answer_exps[key] = etree
return etree
def parse_eval(string):
""" Given an expression, return it's parse tree and it's evaluation tree """
expr = parse_webwork(string)
if expr:
try:
etree = eval_parsed(expr)
return expr, etree
except:
return (None, None)
else:
return (None, None)
def parsed(string):
expr = parse_webwork(string)
if expr:
try:
etree = eval_parsed(expr)
nums = Collect_numbers(etree)
return etree, nums
except:
return (None, None)
else:
return (None, None)