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def send_notifications(): # Retrieve registered users from DB registered_users = retrieve_registered_users()

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def retrieve_registered_users(): # Implement DB query to retrieve registered users pass pacem lee dengler satb pdf updated

def check_for_updates(): # Calculate hash of current PDF file current_hash = hashlib.md5(open(PDF_FILE, 'rb').read()).hexdigest() pacem lee dengler satb pdf updated