ImportError: cannot import name 'TwilioRestClient' from 'twilio.rest'

TL;DR: TwilioRestClient died in twilio 6.0. Replace from twilio.rest import TwilioRestClient with from twilio.rest import Client, and TwilioRestClient(accountsid, authtoken) with Client(accountsid, authtoken).

ImportError: cannot import name 'TwilioRestClient' from 'twilio.rest'

Fix it

1. Change the import: from twilio.rest import Client. Expected: imports cleanly.
2. Change instantiation: client = Client([account sid], [auth token]). Expected: same object shape as before.
3. Update method calls if old: client.messages.create(...) works on both, but check the v6 changelog for renames you use. Expected: tests pass.
4. Pin twilio>=6 in requirements (or >=7/8 for current) so installs stay consistent.

When this applies

• The code imports TwilioRestClient and twilio is 6+.

When it doesn't

• twilio is 5.x: TwilioRestClient exists; reinstall if the import fails.
• The import works but API calls 401: credential problem, not this.

Compatibility

• twilio >= 6.0. Current is 8.x/9.x.

Why it happens

v6 unified the client classes and removed the legacy name. Old quickstart code copied from pre-2017 docs still shows TwilioRestClient.

Edge cases

• TaskRouter and other sub-clients moved too; check imports for the full client surface you use.