I Use This!
Low Activity
Analyzed 35 minutes ago. based on code collected 37 minutes ago.

Project Summary

Traitlets is a pure Python library enabling:

the enforcement of strong typing for attributes of Python objects (typed attributes are called "traits");
dynamically calculated default values;
automatic validation and coercion of trait attributes when attempting a change;
registering for receiving notifications when trait values change;
reading configuring values from files or from command line arguments - a distinct layer on top of traitlets, so you may use traitlets without the configuration machinery.
Its implementation relies on the descriptor pattern, and it is a lightweight pure-python alternative of the traits library.


coercion configuration notification observer python strongtyping strong_typing trait typing validation

BSD 3-clause "New" or "Revised" License

Commercial Use



Place Warranty


Hold Liable

Use Trademarks


Include Copyright

Include License

These details are provided for information only. No information here is legal advice and should not be used as such.

Project Security

Vulnerabilities per Version ( last 10 releases )

There are no reported vulnerabilities

Project Vulnerability Report

Security Confidence Index

Poor security track-record
Favorable security track-record

Vulnerability Exposure Index

Many reported vulnerabilities
Few reported vulnerabilities

Did You Know...

  • ...
    nearly 1 in 3 companies have no process for identifying, tracking, or remediating known open source vulnerabilities
  • ...
    check out hot projects on the Open Hub
  • ...
    55% of companies leverage OSS for production infrastructure
  • ...
    you can subscribe to e-mail newsletters to receive update from the Open Hub blog
About Project Security


2 Other

30 Day Summary

Mar 20 2021 — Apr 19 2021

12 Month Summary

Apr 19 2020 — Apr 19 2021
  • 156 Commits
    Up + 123 (372%) from previous 12 months
  • 19 Contributors
    Up + 6 (46%) from previous 12 months