class SaveAutoGrades(Preprocessor):
"""Preprocessor for saving out the autograder grades into a MongoDB"""
db_name = Unicode("gradebook", config=True, help="Database name")
db_ip = Unicode("localhost",
config=True,
help="IP address for the database")
db_port = Integer(27017, config=True, help="Port for the database")
assignment_id = Unicode(u'assignment', config=True, help="Assignment ID")
def preprocess(self, nb, resources):
# connect to the mongo database
self.gradebook = Gradebook(self.db_name,
ip=self.db_ip,
port=self.db_port)
self.student = self.gradebook.find_student(
student_id=resources['nbgrader']['student_id'])
self.assignment = self.gradebook.find_assignment(
assignment_id=self.assignment_id)
self.notebook = self.gradebook.find_or_create_notebook(
notebook_id=resources['unique_key'],
student=self.student,
assignment=self.assignment)
# keep track of the number of comments we add
self.comment_index = 0
# process the cells
nb, resources = super(SaveAutoGrades, self).preprocess(nb, resources)
return nb, resources
def _add_comment(self, cell, resources):
"""Graders can optionally add comments to the student's solutions, so
add the comment information into the database if it doesn't
already exist. It should NOT overwrite existing comments that
might have been added by a grader already.
"""
# retrieve or create the comment object from the database
comment = self.gradebook.find_or_create_comment(
notebook=self.notebook, comment_id=self.comment_index)
# update the number of comments we have inserted
self.comment_index += 1
self.log.debug(comment)
def _add_score(self, cell, resources):
"""Graders can override the autograder grades, and may need to
manually grade written solutions anyway. This function adds
score information to the database if it doesn't exist. It does
NOT override the 'score' field, as this is the manual score
that might have been provided by a grader.
"""
# these are the fields by which we will identify the score
# information
grade = self.gradebook.find_or_create_grade(
notebook=self.notebook,
grade_id=cell.metadata['nbgrader']['grade_id'])
# deterine what the grade is
grade.autoscore, grade.max_score = utils.determine_grade(cell)
# Update the grade information and print it out
self.gradebook.update_grade(grade)
self.log.debug(grade)
def preprocess_cell(self, cell, resources, cell_index):
# if it's a solution cell, then add a comment
if utils.is_solution(cell):
self._add_comment(cell, resources)
# if it's a grade cell, the add a grade
if utils.is_grade(cell):
self._add_score(cell, resources)
return cell, resources
class SaveAutoGrades(Preprocessor):
"""Preprocessor for saving out the autograder grades into a MongoDB"""
db_name = Unicode("gradebook", config=True, help="Database name")
db_ip = Unicode("localhost", config=True, help="IP address for the database")
db_port = Integer(27017, config=True, help="Port for the database")
assignment_id = Unicode(u'assignment', config=True, help="Assignment ID")
def preprocess(self, nb, resources):
# connect to the mongo database
self.gradebook = Gradebook(self.db_name, ip=self.db_ip, port=self.db_port)
self.student = self.gradebook.find_student(
student_id=resources['nbgrader']['student_id'])
self.assignment = self.gradebook.find_assignment(
assignment_id=self.assignment_id)
self.notebook = self.gradebook.find_or_create_notebook(
notebook_id=resources['unique_key'],
student=self.student,
assignment=self.assignment)
# keep track of the number of comments we add
self.comment_index = 0
# process the cells
nb, resources = super(SaveAutoGrades, self).preprocess(nb, resources)
return nb, resources
def _add_comment(self, cell, resources):
"""Graders can optionally add comments to the student's solutions, so
add the comment information into the database if it doesn't
already exist. It should NOT overwrite existing comments that
might have been added by a grader already.
"""
# retrieve or create the comment object from the database
comment = self.gradebook.find_or_create_comment(
notebook=self.notebook,
comment_id=self.comment_index)
# update the number of comments we have inserted
self.comment_index += 1
self.log.debug(comment)
def _add_score(self, cell, resources):
"""Graders can override the autograder grades, and may need to
manually grade written solutions anyway. This function adds
score information to the database if it doesn't exist. It does
NOT override the 'score' field, as this is the manual score
that might have been provided by a grader.
"""
# these are the fields by which we will identify the score
# information
grade = self.gradebook.find_or_create_grade(
notebook=self.notebook,
grade_id=cell.metadata['nbgrader']['grade_id'])
# set the maximum earnable score
points = float(cell.metadata['nbgrader']['points'])
grade.max_score = points
# If it's a code cell and it threw an error, then they get
# zero points, otherwise they get max_score points. If it's a
# text cell, we can't autograde it.
if cell.cell_type == 'code':
grade.autoscore = points
for output in cell.outputs:
if output.output_type == 'pyerr':
grade.autoscore = 0
break
else:
grade.autoscore = None
# Update the grade information and print it out
self.gradebook.update_grade(grade)
self.log.debug(grade)
def preprocess_cell(self, cell, resources, cell_index):
# if it's a solution cell, then add a comment
if utils.is_solution(cell):
self._add_comment(cell, resources)
# if it's a grade cell, the add a grade
if utils.is_grade(cell):
self._add_score(cell, resources)
return cell, resources
