cedarpy

library4.8.1pypypi✓ verified 82d ago

A Python binding for Cedar (AWS's policy language), enabling policy evaluation and management. Current version 4.8.1 requires Python >=3.9. Active development, monthly releases.

aws auth-security serialization

pip install cedarpy

package ↗

INSTALL

IMPORT

SIG · CEDARPY

cedarpy

awspythonv4.8.1

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

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

is_authorized

✓ from cedarpy import is_authorized

✗ from cedarpy import CedarPolicy

AuthzResult

✓ from cedarpy import AuthzResult

PolicySet

✓ from cedarpy import PolicySet

Load a simple Cedar policy, create entities, and evaluate an authorization request.

from cedarpy import CedarPolicy, CedarEntity policy = CedarPolicy('permit(principal in Namespace::"User::"+resource.owner, action, resource);') entities = [CedarEntity(uid='User::"alice"', attrs={'owner': 'alice'})] request = policy.evaluate(principal='User::"alice"', action='Action::"view"', resource='Resource::"file1"', entities=entities) print(request.decision)

Debug

Known issues

breakingIn version 4.x, the API changed significantly from 3.x. The `evaluate` method now returns an object with a `decision` attribute instead of a string.

fix

Ensure your code accesses `.decision` on the result object, e.g., `result.decision`.

affects: >=4.0.0

deprecatedThe `CedarPolicy.from_string()` method is deprecated in favor of the constructor `CedarPolicy(...)`.

fix

Replace `CedarPolicy.from_string(policy_str)` with `CedarPolicy(policy_str)`.

affects: >=4.5.0

gotchaEntity UIDs must include the type prefix (e.g., 'User::"alice"'). Omitting the type will cause evaluation to fail silently or return Deny.

fix

Always specify the entity type in the UID string, like `'User::"alice"'`.

affects: >=4.0.0

Upgrade

Version history

4.8.1latest on PyPI · released Apr 23, 2026

Audit

Dependencies

pydanticrequiredUsed for validation and serialization of Cedar entities and requests.

Agent activity

31 hits · last 30 days

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OpenAI (training)

Resources

packagehttps://pypi.org/project/cedarpy/ ↗