145 lines
5.7 KiB
Python
145 lines
5.7 KiB
Python
from lxml import etree
|
|
import random
|
|
import imp
|
|
import logging
|
|
import sys
|
|
import types
|
|
|
|
from django.conf import settings
|
|
|
|
from courseware.course_settings import course_settings
|
|
from xmodule import graders
|
|
from xmodule.graders import Score
|
|
from models import StudentModule
|
|
import courseware.content_parser as content_parser
|
|
import xmodule
|
|
|
|
_log = logging.getLogger("mitx.courseware")
|
|
|
|
|
|
def grade_sheet(student,coursename=None):
|
|
"""
|
|
This pulls a summary of all problems in the course. It returns a dictionary with two datastructures:
|
|
|
|
- courseware_summary is a summary of all sections with problems in the course. It is organized as an array of chapters,
|
|
each containing an array of sections, each containing an array of scores. This contains information for graded and ungraded
|
|
problems, and is good for displaying a course summary with due dates, etc.
|
|
|
|
- grade_summary is the output from the course grader. More information on the format is in the docstring for CourseGrader.
|
|
"""
|
|
dom=content_parser.course_file(student,coursename)
|
|
course = dom.xpath('//course/@name')[0]
|
|
xmlChapters = dom.xpath('//course[@name=$course]/chapter', course=course)
|
|
|
|
responses=StudentModule.objects.filter(student=student)
|
|
response_by_id = {}
|
|
for response in responses:
|
|
response_by_id[response.module_id] = response
|
|
|
|
|
|
totaled_scores = {}
|
|
chapters=[]
|
|
for c in xmlChapters:
|
|
sections = []
|
|
chname=c.get('name')
|
|
|
|
|
|
for s in dom.xpath('//course[@name=$course]/chapter[@name=$chname]/section',
|
|
course=course, chname=chname):
|
|
problems=dom.xpath('//course[@name=$course]/chapter[@name=$chname]/section[@name=$section]//problem',
|
|
course=course, chname=chname, section=s.get('name'))
|
|
|
|
graded = True if s.get('graded') == "true" else False
|
|
scores=[]
|
|
if len(problems)>0:
|
|
for p in problems:
|
|
(correct,total) = get_score(student, p, response_by_id, coursename=coursename)
|
|
|
|
if settings.GENERATE_PROFILE_SCORES:
|
|
if total > 1:
|
|
correct = random.randrange( max(total-2, 1) , total + 1 )
|
|
else:
|
|
correct = total
|
|
|
|
if not total > 0:
|
|
#We simply cannot grade a problem that is 12/0, because we might need it as a percentage
|
|
graded = False
|
|
scores.append( Score(correct,total, graded, p.get("name")) )
|
|
|
|
section_total, graded_total = graders.aggregate_scores(scores, s.get("name"))
|
|
#Add the graded total to totaled_scores
|
|
format = s.get('format', "")
|
|
subtitle = s.get('subtitle', format)
|
|
if format and graded_total[1] > 0:
|
|
format_scores = totaled_scores.get(format, [])
|
|
format_scores.append( graded_total )
|
|
totaled_scores[ format ] = format_scores
|
|
|
|
section_score={'section':s.get("name"),
|
|
'scores':scores,
|
|
'section_total' : section_total,
|
|
'format' : format,
|
|
'subtitle' : subtitle,
|
|
'due' : s.get("due") or "",
|
|
'graded' : graded,
|
|
}
|
|
sections.append(section_score)
|
|
|
|
chapters.append({'course':course,
|
|
'chapter' : c.get("name"),
|
|
'sections' : sections,})
|
|
|
|
|
|
grader = course_settings.GRADER
|
|
grade_summary = grader.grade(totaled_scores)
|
|
|
|
return {'courseware_summary' : chapters,
|
|
'grade_summary' : grade_summary}
|
|
|
|
def get_score(user, problem, cache, coursename=None):
|
|
## HACK: assumes max score is fixed per problem
|
|
id = problem.get('id')
|
|
correct = 0.0
|
|
|
|
# If the ID is not in the cache, add the item
|
|
if id not in cache:
|
|
module = StudentModule(module_type = 'problem', # TODO: Move into StudentModule.__init__?
|
|
module_id = id,
|
|
student = user,
|
|
state = None,
|
|
grade = 0,
|
|
max_grade = None,
|
|
done = 'i')
|
|
cache[id] = module
|
|
|
|
# Grab the # correct from cache
|
|
if id in cache:
|
|
response = cache[id]
|
|
if response.grade!=None:
|
|
correct=float(response.grade)
|
|
|
|
# Grab max grade from cache, or if it doesn't exist, compute and save to DB
|
|
if id in cache and response.max_grade is not None:
|
|
total = response.max_grade
|
|
else:
|
|
## HACK 1: We shouldn't specifically reference capa_module
|
|
## HACK 2: Backwards-compatibility: This should be written when a grade is saved, and removed from the system
|
|
# TODO: These are no longer correct params for I4xSystem -- figure out what this code
|
|
# does, clean it up.
|
|
# from module_render import I4xSystem
|
|
# system = I4xSystem(None, None, None, coursename=coursename)
|
|
# total=float(xmodule.capa_module.Module(system, etree.tostring(problem), "id").max_score())
|
|
# response.max_grade = total
|
|
# response.save()
|
|
total = 1
|
|
# For a temporary fix, we just assume a problem is worth 1 point if we haven't seen it before. This is totally incorrect
|
|
|
|
#Now we re-weight the problem, if specified
|
|
weight = problem.get("weight", None)
|
|
if weight:
|
|
weight = float(weight)
|
|
correct = correct * weight / total
|
|
total = weight
|
|
|
|
return (correct, total)
|