gistfile1.py

# user_updates.py
import db
import requests

def update_user_login():
  if requests.method == 'post':
    c = db.connect('connection string').cursor()
    c.execute('select * from users where email like "%' + requests.query.get("n") + '%"') # execute sql here.
    r = c.fetchall()
    if r:
      # Update user last login, this will simply execute an sql.
      c.query('update users set last_login = NOW() where email = "' + requests.query.get("n") + '"')
      c.close()

  return '{"status": "ok", "code": 200}'


# main.py
from user_updates import update_user_login

# Some routing logic to match...
match('/', METHOD_POST, update_user_login)

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