https://github.com/orisano/embexpr

safe embedded python expression parser (for mainly easy DSL or config file)
https://github.com/orisano/embexpr

configuration dsl expression-evaluator python

Last synced: 4 months ago
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safe embedded python expression parser (for mainly easy DSL or config file)

• Host: GitHub
• URL: https://github.com/orisano/embexpr
• Owner: orisano
• License: mit
• Created: 2017-11-17T10:04:44.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2021-06-01T23:35:46.000Z (over 3 years ago)
• Last Synced: 2024-10-04T17:51:08.437Z (4 months ago)
• Topics: configuration, dsl, expression-evaluator, python
• Language: Python
• Homepage:
• Size: 72.3 KB
• Stars: 6
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.rst
  • License: LICENSE

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README

        
embexpr

============

.. image:: https://travis-ci.com/orisano/embexpr.svg?branch=master

    :target: https://travis-ci.com/orisano/embexpr

.. image:: https://badge.fury.io/py/embexpr.svg

    :target: https://badge.fury.io/py/embexpr

.. image:: https://img.shields.io/pypi/pyversions/embexpr.svg

    :target: https://pypi.org/project/embexpr/

| safe embedded python expression parser (for mainly easy DSL or config file).

Getting Started

-----------------

.. code:: bash

  pip install embexpr

How to Use

------------

.. code:: python

  from embexpr import Expr, ParseError

  assert Expr('3 * 5')() == 15

  assert Expr('"foo" + "bar"')() == "foobar"

  assert Expr('len("example")')() == 7

  assert Expr('s.startswith("prefix_")')(s="prefix_suffix") == True

  try:

      Expr('eval("1")')()

  except ParseError as e:

      print(e)

Reference

------------

https://github.com/ansible/ansible/blob/devel/lib/ansible/template/safe_eval.py

http://stackoverflow.com/questions/12523516/using-ast-and-whitelists-to-make-pythons-eval-safe

Author

------------

Nao Yonashiro(@orisano)

License

------------

MIT