def exercise(exercise_question, exercise_data, channel):
args_data = get_content_node_args(exercise_data)
contentnode_kwargs = get_content_node_kwargs(exercise_data)
del contentnode_kwargs['extra_fields']
mastery_model_dict = contentnode_kwargs['exercise_data']
exercise = ExerciseNode(*args_data, **contentnode_kwargs)
exercise.add_question(exercise_question)
channel.add_child(exercise)
exercise_data['questions'] = [exercise_question]
exercise_data['extra_fields'] = mastery_model_dict
del exercise_data['exercise_data']
return exercise
def create_node(node, assessment_dict, subtitle_path, vtt_videos, base_path,
lite_version, lang_code):
kind = node.get('kind')
# Exercise node creation
if kind == 'Exercise':
child_node = ExerciseNode(
source_id=node['id'],
title=node['title'],
exercise_data={
'mastery_model': node.get('suggested_completion_criteria')
},
description='' if node.get("description") is None else node.get(
"description", '')[:400],
license=licenses.ALL_RIGHTS_RESERVED,
thumbnail=node.get('image_url_256'),
)
# build exercise urls for previews
full_path = base_path + node.get('path').strip('khan')
slug = full_path.split('/')[-2]
full_path = full_path.replace(slug, 'e') + slug
# attach Perseus questions to Exercises
for item in node['all_assessment_items']:
# we replace all references to assessment images with the local file path to the image
for match in re.finditer(FILE_URL_REGEX,
assessment_dict[item['id']]["item_data"]):
file_path = str(match.group(0)).replace('\\', '')
file_path = file_path.replace(REPLACE_STRING,
IMAGE_DL_LOCATION)
assessment_dict[item['id']]["item_data"] = re.sub(
FILE_URL_REGEX, file_path,
assessment_dict[item['id']]["item_data"], 1)
question = PerseusQuestion(
id=item['id'],
raw_data=assessment_dict[item['id']]['item_data'],
source_url=full_path if not lite_version else None,
)
child_node.add_question(question)
# Topic node creation
elif kind == 'Topic':
child_node = TopicNode(
source_id=node["id"],
title=node["title"],
description='' if node.get("description") is None else node.get(
"description", '')[:400])
# Video node creation
elif kind == 'Video':
# standard download url for KA videos
download_url = "https://cdn.kastatic.org/KA-youtube-converted/{0}.mp4/{1}.mp4".format(
node['youtube_id'], node['youtube_id'])
files = [VideoFile(download_url)]
if node['youtube_id'] in vtt_videos:
files.append(
SubtitleFile(subtitle_path +
'/{}.vtt'.format(node['youtube_id']),
language=getlang(lang_code)))
child_node = VideoNode(
source_id=node["id"],
title=node["title"],
description='' if node.get("description") is None else node.get(
"description", '')[:400],
files=files,
thumbnail=node.get('image_url'),
license=licenses.CC_BY_NC_SA)
else: # unknown content file format
return None
return child_node