# Run with Python 3

import json

import requests

### DATA ENDS

# Enter parameters below:

# 1. Get your keys at https://stepik.org/oauth2/applications/ (client type = confidential,

# authorization grant type = client credentials)

client_id = '...'

client_secret = '...'

api_host = 'https://stepik.org'

# 2. Get a token

auth = requests.auth.HTTPBasicAuth(client_id, client_secret)

resp = requests.post('https://stepik.org/oauth2/token/',

data={'grant_type': 'client_credentials'},

auth=auth

)

token = resp.json().get('access_token')

if not token:

raise RuntimeWarning('Client id/secret is probably incorrect')

# 3. Call API (https://stepik.org/api/docs/) using this token.

def fetch_object(obj_class, obj_id):

api_url = '{}/api/{}s/{}'.format(api_host, obj_class, obj_id)

response = requests.get(api_url,

headers={'Authorization': 'Bearer ' + token}).json()

return response['{}s'.format(obj_class)][0]

def fetch_objects(obj_class, obj_ids):

objs = []

# Fetch objects by 30 items,

# so we won't bump into HTTP request length limits

step_size = 30

for i in range(0, len(obj_ids), step_size):

obj_ids_slice = obj_ids[i:i + step_size]

api_url = '{}/api/{}s?{}'.format(api_host, obj_class,

'&'.join('ids[]={}'.format(obj_id)

for obj_id in obj_ids_slice))

response = requests.get(api_url,

headers={'Authorization': 'Bearer ' + token}

).json()

objs += response['{}s'.format(obj_class)]

return objs

# SOMETHING MEANINGFUL:

courses = fetch_objects('course', list(range(2000)))

total_courses = 0

total_enrollments = 0

total_lessons = 0

for course in courses:

course_id = course['id']

learners_group_id = course['learners_group']

learners_group = fetch_object('group', learners_group_id)

learners_count = len(learners_group['users'])

sections = fetch_objects('section', course['sections'])

units_count = sum(len(section['units']) for section in sections)

lessons_count = units_count

print(course_id, learners_count, lessons_count)

if learners_count >= 10:

total_courses += 1

total_enrollments += learners_count

total_lessons += lessons_count

print('Number of courses with >= 10 learners:', total_courses)

print('Total number of enrollments in such courses:', total_enrollments)

print('Total number of lessons in such courses:', total_lessons)