test.py
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import os
import random
import yaml
import json
import sqlite3
from datetime import datetime
import questions
import database
# ============================================================================
def read_configuration(filename):
# FIXME validar se ficheiros e directorios existem???
if not os.path.isfile(filename):
print('Cannot find file "%s"' % filename)
os.sys.exit(1)
with open(filename, 'r') as f:
test = yaml.load(f)
# defaults:
test['ref'] = str(test.get('ref', filename))
test['title'] = str(test.get('title', ''))
test['show_hints'] = bool(test.get('show_hints', False))
test['show_points'] = bool(test.get('show_points', False))
test['train_mode'] = bool(test.get('train_mode', False))
test['save_answers'] = bool(test.get('save_answers', True))
if test['save_answers']:
if 'answers_dir' not in test:
print(' * Missing "answers_dir" in the test configuration.')
sys.exit(1)
if not os.path.isdir(test['answers_dir']):
print(' * Directory "%s" does not exist. Creating...' % test['answers_dir'])
os.mkdir(test['answers_dir'])
if 'database' not in test:
print(' * Missing database in the test configuration.')
sys.exit(1)
if isinstance(test['files'], str):
test['files'] = [test['files']]
# replace ref,points by actual questions from pool
pool = questions.QuestionsPool()
pool.add_from_files(test['files'])
for i, q in enumerate(test['questions']):
# each question is a list of alternative versions, even if the list
# contains only one element
if isinstance(q, str):
# questions: some_ref --> questions: [{'ref':'some_ref', 'points':1.0, ...}]
test['questions'][i] = [pool[q]]
test['questions'][i][0]['points'] = 1.0
elif isinstance(q, dict):
if isinstance(q['ref'], str):
q['ref'] = [q['ref']]
p = float(q.get('points', 1.0))
l = []
for r in q['ref']:
qq = pool[r]
qq['points'] = p
l.append(qq)
test['questions'][i] = l
return test
# ============================================================================
class Test(dict):
# -----------------------------------------------------------------------
def __init__(self, d):
super().__init__(d)
qlist = []
for i, qq in enumerate(self['questions']):
q = random.choice(qq) # select from alternative versions
qlist.append(questions.create_question(q)) # create instance
self['questions'] = qlist
self['start_time'] = datetime.now()
# -----------------------------------------------------------------------
def update_answers(self, ans):
'''given a dictionary ans={'ref':'some answer'} updates the answers
of the test. FIXME: check if answer is to be corrected or not
'''
for i, q in enumerate(self['questions']):
if q['ref'] in ans:
if q['type'] == 'checkbox' and ans[q['ref']] == None:
# HACK: checkboxes in html return none instead of an empty list
# we have to manualy replace by []
q['answer'] = []
else:
q['answer'] = ans[q['ref']]
# -----------------------------------------------------------------------
def correct(self):
'''Corrects all the answers and computes the final grade.'''
self['finish_time'] = datetime.now()
total_points = 0.0
final_grade = 0.0
for q in self['questions']:
final_grade += q.correct() * q['points']
total_points += q['points']
final_grade = 20.0 * max(final_grade / total_points, 0.0)
self['grade'] = final_grade
return final_grade
# -----------------------------------------------------------------------
def save_json(self, path):
filename = ' -- '.join((str(self['number']), self['ref'],
str(self['finish_time']))) + '.json'
filepath = os.path.abspath(os.path.join(path, filename))
with open(filepath, 'w') as f:
json.dump(self, f, indent=2, default=str)
# HACK default=str is required for datetime objects