This is a pre-production deployment of Warehouse, however changes made here WILL affect the production instance of PyPI.
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Project Description

There are quite many Configuration Parsers for Python out there, but well, they all kind of suck in there own way. Let me point out what I dislike:

  • configparser: which is the de facto standard, has it’s ini like language, in my opionion quite awful, difficult and limited
  • Configuration through yaml: is beautiful, but how about intergration of simple environment variables or interpolation of already defined values
  • How about just execution a python module, very unsafe (but who cares), but it also pollutes the namespace with all sort of builtins and whatsoever

So I was looking once again and found python-config, which looked really exactly what I wanted, but well, I had my problems with it, since I wanted to have acces to stuff like os.getenv(‘HOME’) and similar, which was not really possible since it was forbidden to call a function, though you could still evaluate stuff and so on. I looke into the source and thought well how can I allow also calling functions? But I realized they are defining there own parsing grammar, which seemed kind of reinventing the wheel since I already knew the ast module.

Finally I wrote a very simple Configuration Parser which lets ast and operator do most of the work. It has of course its own problems, and is hack of half an hour so don’t expect much. For me it is still usefull, and maybe we can improve it.

Usage

As a simple example of what is possible and how to use the module, see the following config file which is by the way completely valid python:

home = os.getenv('HOME')
aster_root = home+"/data/opt/aster"
project = "bikeframe-test"
version = "testing"
# source directory for all files if relative path
srcdir = "."
# output directory for all stuff
outdir = "results"
# input mesh file
meshfile = "mesh.med"
logfile = "asterclient.log"
workdir = "/data/tmp"
# define the studies
calculations = [
    {"name":"main",
      "commandfile": "main.comm",
      "resultfiles":{
            "bikeframe.rmed":80,
            "bikeframe.msh": 81,
            "buckling.rmed": 82,
            "bikeframe.table": 39,
            "bikeframe.resu": 38,
            "buckling.resu": 37,
            },
      "inputfiles":["parameters.py"],
      },
    {"name": "post",
      "commandfile":"post.comm",
      "poursuite": "main",
      "resultfiles":{
        "vmises.table": 40,
        "protocol": "protocol*.rst",
        }
      }]

Suppose we have this saved as profile.conf we could read it like:

import os
from configreader import Config

c = Config(open('profile.conf','r'),namespace={'os.getenv':os.getenv})

which would give as all the values specified and evaluated as a python dict. If we wouldn’t have provided the namespace with os.getenv the parsing would have failed since it only allows functions mapped in the namespace, so you have completele fine grained possibility on what to allow. As input the Config class expects any file like object which is an object with a read method.

Testing

There are a few simple test cases in tests use best py.test to run them.

Release History

Release History

0.0.6

This version

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0.0.5

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0.0.4

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0.0.3

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0.0.2

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Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
configreader-0.0.6-py2-none-any.whl (6.9 kB) Copy SHA256 Checksum SHA256 py2 Wheel Oct 1, 2014
configreader-0.0.6.tar.gz (4.3 kB) Copy SHA256 Checksum SHA256 Source Oct 1, 2014

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