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Update Student Notification Preferences with Python

Navigator II
5 1 424

This post was originally published on my own blog.

In moving to online, we've tried to streamline all of our communication through Canvas. The goal is to cut down on disconnected email threads and encourage students to use submission comments to keep questions and feedback in context.

The Problem

Many students had already turned off email notifications for most communications in Canvas, preferring not to have any notices, which reduces their responsibility for teacher prompting and revision. Notifications are a user setting and the Canvas admin panel doesn't provide a way to define a default set of notification levels for users. However, with the API, we were able to write a Python program that sets notification prefs by combining the as_user_id query param as an admin that sets user notification preferences.

API Endpoints

  • GET user communication channel IDs: /api/v1/users/:user_id/communication_channels
  • PUT channel preferences for user: api/v1/users/self/communication_channels/{channel_id}/notification_preferences/{msg_type}


  • Int user_id
  • Int channel_id
  • String frequency

Get User IDs

There is no easy way to programmatically get user IDs at the account or subaccount levels without looping each course and pulling enrollments. Instead, we opted to pull a CSV of all enrollments using the Provisioning report through the Admin panel. We configured separate files using the current term as the filter. This CSV included teacher, student, and observer roles. The script limits the notification updates to student enrollments.

Script Details

The full program is available in a GitHub gist. Here is an annotated look at the core functions.

main handles the overall process in a multi-threaded context. We explicitly define a number of workers in the thread pool because the script would hang without a defined number. Five seemed to work consistently and ran 1500 records (a single subaccount) in about 7 minutes.

The CSV includes all enrollments for each student ID, so we created a set to isolate a unique list of student account IDs (lines 9-10).

To track progress, we wrapped the set in tqdm. This prints a status bar in the terminal while the process is running which shows the number of processed records out of the total length. This is not part of the standard library, so it needs to be installed from PyPI before you can import it.

def main():
Update Canvas user notification preferences as an admin.

unique = set()
data = []
with open('your.csv', 'r') as inp:
for row in csv.reader(inp):
if"student", row[4]):

with concurrent.futures.ThreadPoolExecutor(max_workers=5) as executor:
with tqdm(total=len(unique)) as progress:
futures = []
for student in unique:
future = executor.submit(process_student_id, student)
future.add_done_callback(lambda p: progress.update())

results = [future.result() for future in futures]‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

process_student_id is called by the context manager for each student ID in the set. Canvas breaks communication methods into "channels:" email, push, Twitter, etc (line 3). Each channel has a unique ID for each user, so we needed to call each user's communication channels and then pass the ID for emails to a setter function.

def process_student_id(student):
# Get their communication channel prefs
channel_id = get_channel_id(student)

# Update the channel prefs and return
update = update_prefs(student, channel_id)
return update
except Exception as e:

GET communication_channels

def get_channel_id(student_id):
url = f"{student_id}/communication_channels"
resp = requests.request("GET", url, headers=headers)

for channel in resp.json():
# find the ID of the email pref
if channel['type'] == 'email':
return channel['id']‍‍‍‍‍‍‍‍

PUT communication_channels/:channel_id/notification_preferences/:message_type[frequency]

The communication channel can receive several types of communications. We wanted to set the student notifications to "immediately" for new announcements, submission comments, and conversation messages. You can define others as well as their frequencies by modifying the values on lines 3-4.

The communication types are not well documented, so  we used our own channel preferences to find the notification strings: GET /users/self/communication_channels/:channel_id/notification_preferences.

The crux of this step is to make the request using the Masquerading query param available to the calling user. Make sure the account which generated the API key can masquerade or else the script will return an unauthorized error. 

def update_prefs(student_id, channel_id):
# loop through different announcement types
types = ["new_announcement", "submission_comment", "conversation_message"]
frequency = "immediately" # 'immediately', 'daily', 'weekly', 'never'
responses = []

for msg_type in types:
url = f"{channel_id}/notification_preferences/{msg_type}?as_user_id={student_id}&notification_preferences[frequency]={frequency}"
resp = requests.request("PUT", url, headers=headers)


return responses‍‍‍‍‍‍‍‍‍‍‍‍‍

Final Thoughts

Updating a user's personal preferences isn't something I was thrilled about doing, but given our current circumstances, it was preferable to the alternative of continuing to struggle to help students move forward in their coursework. Further improvements would be to call each CSV in the file system incrementally, cutting down on the time someone has to log in and run the script. Hopefully, this only needs to be done once and does not become a recurring task. Second, there is an endpoint in the API to update multiple communication preferences at once, but it isn't well documented and I wasn't able to get it working reliably. For just one channel and three specific types of messages, the performance improvements probably would have been negligible (at least that's what I'm telling myself).

Tags (3)
1 Comment
Surveyor II

Hi Brian

it’s possible to lookup UserID via their Email Address or SIS ID with this endpoint Users - Canvas LMS REST API Documentation