Serialize python parent class from inherited class to JSON - possible or stupid? -


i know there lot of question on json serialization, i'm still not grasping seems.

given following class:

import json  class basemongoobject(object):     def __init__(self):         pass      def jsonify(self):         return json.dumps(self, default=lambda o: o.__dict)

and following derived class:

from assetfacts import assetfacts bmo import basemongoobject  class asset(basemongoobject):     def __init__(self):         basemongoobject.__init__(self)         self.facts = assetfacts()         self.serial = none

trying call asset.jsonify() using following piece of test code:

from asset import asset  def test_me():     = asset()     a.serial = '123asdf'      print a.jsonify()   if __name__ == '__main__':     test_me()

produces following:

    traceback (most recent call last):   file "../bin/test.py", line 17, in <module>     test_me()   file "../bin/test.py", line 13, in test_me     print a.jsonify()   file "/users/vlazarenko/mp/ac/lib/bmo.py", line 8, in jsonify     return json.dumps(self, default=lambda o: o.__dict)   file "/system/library/frameworks/python.framework/versions/2.7/lib/python2.7/json/__init__.py", line 250, in dumps     sort_keys=sort_keys, **kw).encode(obj)   file "/system/library/frameworks/python.framework/versions/2.7/lib/python2.7/json/encoder.py", line 207, in encode     chunks = self.iterencode(o, _one_shot=true)   file "/system/library/frameworks/python.framework/versions/2.7/lib/python2.7/json/encoder.py", line 270, in iterencode     return _iterencode(o, 0)   file "/users/vlazarenko/mp/ac/lib/bmo.py", line 8, in <lambda>     return json.dumps(self, default=lambda o: o.__dict) attributeerror: 'asset' object has no attribute '_basemongoobject__dict'

where going braindead this? ideally wouldn't wanna bothered amount of levels of inheritance, serialize way top.

you want jsonify self.__dict__ instead:

def jsonify(self):     return json.dumps(self, default=lambda o: o.__dict__)

names start double underscore mangled protect them accidental overriding in subclass, .__dict rewritten ._basemongoobject__dict.


Comments

Post a Comment

Popular posts from this blog

android - Get AccessToken using signpost OAuth without opening a browser (Two legged Oauth) -

i using signpost oauth access data magento server. have read various tutorials on same , reach point open browser user can enter credentials. however, per requirement have automate part. hence, user should not browser page. have set-up done on server side ( magento ), hit url , returned call page. same through program in android. i have tried below, consumer = new commonshttpoauthconsumer(key, secret); provider = new commonshttpoauthprovider(oauth_init_url,access_token_url, authorize_url); try { provider.retrieverequesttoken(consumer, oauth.out_of_band); log.d("tokens" , consumer.gettoken() + " -- " + consumer.gettokensecret()); } and request tokens. dont know how bypass next step. tried directly accessing accesstoken (stupid of me) provider.retrieveaccesstoken(consumer, "mycallback://callback"); no luck, ends in oauth.signpost.exception.oauthnotauthorizedexception: authorization failed (server replied 401). ...
Read more

org.mockito.exceptions.misusing.InvalidUseOfMatchersException: mockito -

getting error org.mockito.exceptions.misusing.invaliduseofmatchersexception: invalid use of argument matchers! 1 matchers expected, 2 recorded. exception may occur if matchers combined raw values: //incorrect: somemethod(anyobject(), "raw string"); when using matchers, arguments have provided matchers. example: //correct: somemethod(anyobject(), eq("string matcher")); at when( getprogramservice .callservice(any(getprogramtype.class))) .thenreturn(jaxbresponse); please explain error , possible resolution the code posted looks fine; don't see problem it. code before or above causing exception. key here: invalid use of argument matchers! 1 matchers expected, 2 recorded. any , used above, doesn't return "special kind of null" or "special kind of getprogramtype"; don't exist. instead, returns null , side effect puts matcher on stack. whe...
Read more

google shop client API returns 400 bad request error while adding an item -

i'm working on solution add items in google shopping market java application. following tutorial real mess because of missing classes of laste release, after setting 1.5-beta maven managed make base example typecheck correctly classes. still can make simple task of adding 1 item. instead of posting whole code i'm posting part creates product feed. private product createproduct(string id) { product product = new product(); product.title = "red wool sweater"; product.content = new content( "text", "comfortable , soft, sweater keep warm on " + "cold winter nights. red , blue stripes."); product.appcontrol = new appcontrol(); product.appcontrol.addrequireddestination("productads"); product.externalid = id; product.lang = "it"; product.country = "it"; product.condition = "nuovo"; product.price = new price("eu...
Read more