python-cas

1.7.1 verified Mon Apr 27 auth: no python

Python CAS client library for integrating with CAS (Central Authentication Service) single sign-on servers. Current version 1.7.1, supports Python >=3.10. Release cadence is sporadic.

pip install python-cas

Common errors

error ImportError: No module named 'cas' ↓

cause Package not installed.

fix

pip install python-cas

error ModuleNotFoundError: No module named 'casclient' ↓

cause Wrong import path.

fix

Use 'from cas import CASClient' instead.

error python-cas requires Python '>=3.10' but the running Python is 3.8 ↓

cause Using too old Python version.

fix

Upgrade Python to 3.10 or higher, or install an older version of python-cas (e.g., 1.6.0).

error AttributeError: module 'cas' has no attribute 'CASClientV2' ↓

cause Older version of python-cas (<1.1.0) may not have V2.

fix

Upgrade to latest version (>=1.1.0).

Warnings

breaking In v1.7.0, support for Python <3.10 was dropped. Also the dependency on 'six' was removed, which may affect code relying on six. ↓

fix Upgrade to Python >=3.10. Replace any six usage with native Python 3 equivalents.

deprecated CASClientV1 is deprecated and may be removed in a future version. Use CASClient with version=3 instead. ↓

fix Use CASClient with version=2 or 3.

gotcha The 'verify_ssl_certificate' parameter is available since v1.4.0. In older versions SSL verification is always enabled. ↓

fix Upgrade to v1.4.0+ or use requests session with custom verify.

gotcha The client uses requests.Session, which holds cookies. Reuse the client instance for multiple requests to maintain session state. ↓

fix Create one CASClient instance and reuse it.

Imports

CASClient

wrong

from casclient import CASClient

correct

from cas import CASClient

Module name is 'cas', not 'casclient'

CASClientV2
```
from cas import CASClientV2
```
CASClientV3
```
from cas import CASClientV3
```

Quickstart

Basic CAS client setup and ticket verification.

from cas import CASClient

client = CASClient(
    version=3,
    service_url='https://myapp.example.com/login',
    server_url='https://cas.example.com/cas/',
    verify_ssl_certificate=True
)
# If you have a ticket from the CAS server:
ticket = request.GET.get('ticket')
if ticket:
    user, attributes, pgtiou = client.verify_ticket(ticket)
    print(f"Authenticated user: {user}")