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# -*- coding: utf-8 -*-
"""
revisions.py
~~~~~~~~~~~~
This module implements a Python object with the revisions for each
package fetched from the octave-forge SVN.
:copyright: (c) 2010 by Rafael Goncalves Martins
:license: GPL-2, see LICENSE for more details.
"""
import json
class Revisions(object):
def __init__(self, json_file):
self._file = json_file
def _load_json(self):
revisions = {}
try:
with open(self._file) as fp:
revisions = json.load(fp)
except:
return {}
return revisions
def _dump_json(self, revisions):
try:
with open(self._file, 'w') as fp:
json.dump(revisions, fp)
except:
return False
return True
def get(self, category=None, package=None):
revisions = self._load_json()
if category is None:
return revisions
if category in revisions:
if package is None:
return revisions[category]
if package in revisions[category]:
return revisions[category][package]
return None
def set(self, category, package, value):
revisions = self._load_json()
if category not in revisions:
revisions[category] = {}
revisions[category][package] = value
if not self._dump_json(revisions):
raise RuntimeError('Failed to save JSON file.')
if __name__ == '__main__':
a = Revisions('/tmp/file.json')
a.set('main', 'fuuuu', 1234)
print a.get()
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