{'id': 0, 'df': 78}

{u'df': 65, u'id': 5}

Traceback (most recent call last):
  File "C:\Users\VMR\Desktop\library\Library.py", line 215, in <module>
    app = MyApp()
  File "C:\Python27\lib\site-packages\wx-3.0-msw\wx\_core.py", line 8631, in __init__
    self._BootstrapApp()
  File "C:\Python27\lib\site-packages\wx-3.0-msw\wx\_core.py", line 8196, in _BootstrapApp
    return _core_.PyApp__BootstrapApp(*args, **kwargs)
  File "C:\Users\VMR\Desktop\library\Library.py", line 209, in OnInit
    style=wx.DEFAULT_FRAME_STYLE^wx.MAXIMIZE_BOX^wx.RESIZE_BORDER)
  File "C:\Users\VMR\Desktop\library\Library.py", line 22, in __init__
    self.properties = json.loads(file.read())
  File "C:\Python27\lib\json\__init__.py", line 338, in loads
    return _default_decoder.decode(s)
  File "C:\Python27\lib\json\decoder.py", line 365, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:\Python27\lib\json\decoder.py", line 381, in raw_decode
    obj, end = self.scan_once(s, idx)
ValueError: Expecting property name: line 1 column 2 (char 1)

import json
a={u'id': 0, u'df': 78}
json.dump(a,open("out.json","w"))

{"df": 78, "id": 0}

self.properties['id'] += 1
file = open("./data/preferences.txt", 'wt')
file.write(str(self.properties))
file.close()

self.properties = json.loads(open("./data/preferences.txt").read())

self.properties = json.loads("./data/preferences.txt")