python-cas

library1.7.2pypypi✓ verified 87d ago

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.

auth-security http-networking

pip install python-cas

github ↗package ↗

INSTALL

IMPORT

SIG · PYTHON-CAS

python-cas

auth-securitypythonv1.7.2

Install

2.7s avg

Import

611ms

Disk

31MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v1.7.2 · pip install

no network on importno background threads

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

py 3.10–3.95 runs

installs and imports cleanly · install 0.0s · import 0.632s · 32.9MB

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 2.7s · import 0.590s · 33MB

31MB installed

● package 31MB

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

CASClient

✓ from cas import CASClient

✗ from casclient import CASClient

Module name is 'cas', not 'casclient'

CASClientV2

✓ from cas import CASClientV2

CASClientV3

✓ from cas import CASClientV3

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}")

Debug

Known issues

breakingIn 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.

affects: >=1.7.0

deprecatedCASClientV1 is deprecated and may be removed in a future version. Use CASClient with version=3 instead.

fix

Use CASClient with version=2 or 3.

affects: all

gotchaThe '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.

affects: <1.4.0

gotchaThe 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.

affects: >=1.6.0

Errors

Common errors & fixes

ImportError: No module named 'cas'

Package not installed.

fix

pip install python-cas

ModuleNotFoundError: No module named 'casclient'

Wrong import path.

fix

Use 'from cas import CASClient' instead.

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

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).

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

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

fix

Upgrade to latest version (>=1.1.0).

Upgrade

Version history

1.7.2latest on PyPI · released May 5, 2026

Audit

Dependencies

requestsrequiredUsed for all HTTP communication with CAS server

lxmloptionalOptional, required for SAML responses parsing

Agent activity

26 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/python-cas/python-cas ↗

packagehttps://pypi.org/project/python-cas/ ↗