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A compiler for PEP 345 environment markers.

Project Description

markerlib

Compile or interpret PEP 345 environment markers.

Usage:

>>> import markerlib
>>> marker = markerlib.compile("os.name == 'posix'")
>>> marker(environment=markerlib.default_environment(),
           override={'os.name':'posix'})
True
>>> marker(environment=markerlib.default_environment(),
           override={'os.name':'nt'})
False

The implementation uses the ast to compile environment markers as Python statements with a limited set of allowed node types.

0.6.0

  • Allow _ where . was previously used (‘os.name’ -> ‘os_name’)

0.5.2

  • Restore ‘as_function’ bw/compat synonym for ‘compile’

0.5.1

  • Include ‘empty marker’ heuristic in markerlib itself

0.5

  • One final release until it’s just a part of distribute

0.4

  • Cache compiled marker functions with weakref.WeakValueDictionary
  • Rename markerlib.as_function to markerlib.compile

0.3

  • Might work on Python 2.5 (includes needed parts of the ast module from Python 2.6+)
  • Include 100% test coverage, tox config file

0.1

  • Initial version

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Filename, size & hash SHA256 hash help File type Python version Upload date
markerlib-0.6.0-py27-none-any.whl (4.8 kB) Copy SHA256 hash SHA256 Wheel 2.7 May 7, 2013
markerlib-0.6.0.tar.gz (3.8 kB) Copy SHA256 hash SHA256 Source None May 7, 2013

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