Hi all,
I'm trying an example (in attached file, I mean the bottom of this
message).
First, I create a list of 3 objects. Then I do:
PutJSONObjects(objects)
objects = GetJSONObjects()
PutJSONObjects(objects, "objects2.json")
1) PutJSONObjects(objects) method creates objects.json file (by
default). It works fine.
2) Then objects = GetJSONObjects() method get the file contents and
return.
3) Finally the script fails on the third method
PutJSONObjects(objects, "objects2.json")
saying: AttributeError: 'dict' object has no attribute '__dict__'
That is true, because objects returned by GetJSONObjects() is not a
list of objects, but simple string....
So here is the question, please, how should I DECODE .json file into
list of python objects so that I will be able to put the copy of these
objects into a new file called objects2.json ?
simplejson docs are hard to follow - without examples.
Please, help me. Be happy!
Arthur
--------
# Python-JSON method for caching my objects.
import simplejson as json
import os.path
from datetime import datetime
def GetJSONObjects():
# determine the json data file path
filename = "objects.json"
filepath = "/home/docmccoy/Documents/" + filename
if os.path.isfile(filepath):
filename = filepath
f = open(filename, 'r')
objects = json.load( f )
print objects
else:
objects = list()
return objects
def PutJSONObjects(objects, filename = "objects.json"):
# determine the json data file path
filepath = "/home/docmccoy/Documents/" + filename
if os.path.isfile(filepath):
filename = filepath
f = open(filename, 'w')
json.dump([o.__dict__ for o in objects], f, indent = 4 * ' ' )
class MyObject:
def __init__(self, ID, url, category, osfamily, createDate):
self.id = ID
self.url = url
self.category = category
self.osfamily = osfamily
self.createDate = createDate
o1 = MyObject(1, "http://google.com";, "search", "linux",
unicode(datetime.now()))
o2 = MyObject(2, "http://localhost";, "mycomp", None,
unicode(datetime.now()))
o3 = MyObject(3, "http://milan.com";, "football", "windows",
unicode(datetime.now()))
objects = list()
objects.append(o1)
objects.append(o2)
objects.append(o3)
PutJSONObjects(objects)
objects = GetJSONObjects()
PutJSONObjects(objects, "objects2.json")
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