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#!/usr/bin/env python
# -*- encoding: utf-8 -*-
""" Utils to support python 2.6 compatibility """
try:
import simplejson as json
except ImportError:
import json
from collections import MutableMapping
def _import_module(module_uri):
return __import__(module_uri, {}, {}, [''])
def import_module(module_uri):
""" Import module by string 'from.path.module'
To support python 2.6
"""
try:
from importlib import import_module
callback = import_module
except ImportError:
callback = _import_module
return callback(module_uri)
class _OrderedDict(dict, MutableMapping):
"""
Src: http://code.activestate.com/recipes/576669/
Author: Raymond Hettinger (Promoter of PEP which introduces OrderDict into
colletions module in python >2.7)
"""
# Methods with direct access to underlying attributes
def __init__(self, *args, **kwds):
if len(args) > 1:
raise TypeError('expected at 1 argument, got %d', len(args))
if not hasattr(self, '_keys'):
self._keys = []
self.update(*args, **kwds)
def clear(self):
del self._keys[:]
dict.clear(self)
def __setitem__(self, key, value):
if key not in self:
self._keys.append(key)
dict.__setitem__(self, key, value)
def __delitem__(self, key):
dict.__delitem__(self, key)
self._keys.remove(key)
def __iter__(self):
return iter(self._keys)
def __reversed__(self):
return reversed(self._keys)
def popitem(self):
if not self:
raise KeyError
key = self._keys.pop()
value = dict.pop(self, key)
return key, value
def __reduce__(self):
items = [[k, self[k]] for k in self]
inst_dict = vars(self).copy()
inst_dict.pop('_keys', None)
return (self.__class__, (items,), inst_dict)
# Methods with indirect access via the above methods
setdefault = MutableMapping.setdefault
update = MutableMapping.update
pop = MutableMapping.pop
keys = MutableMapping.keys
values = MutableMapping.values
items = MutableMapping.items
def __repr__(self):
pairs = ', '.join(map('%r: %r'.__mod__, self.items()))
return '%s({%s})' % (self.__class__.__name__, pairs)
def copy(self):
return self.__class__(self)
@classmethod
def fromkeys(cls, iterable, value=None):
d = cls()
for key in iterable:
d[key] = value
return d
try:
from collections import OrderedDict
except ImportError:
OrderedDict = _OrderedDict
|
