reconstituting a class full of data from MySQL BLOB object in python -


i'm using cherrypy , seems not behave nicely when comes retrieving data stored files on server. (i asked on , nobody replied, i'm on plan b, or c...) have stored class containing bunch of data structures (3 dictionaries , 2 lists of lists related) in mysql table, , amazingly, easier thought insert binary object (longblob). turned pickle file , inserted it.

however, can't figure out how reconstitute pickle , rebuild class full of data now. database returns giant string looks pickle, how make string file-like object pickle.load(data) work?

alternative solutions: how save class blob in database, or ideas on why can save pickle of class when go load later, class seems lost. in ssh / locally, works - when calling pickle.load(xxx) cherrypy errors.

i'm plan d - if there's better way store collection of structured data fast retrieval without pickles or mysql blobs...

you can create file-like in-memory object (c)stringio:

>>> cstringio import stringio >>> fobj = stringio('file\ncontent') >>> line in fobj: ...   print line ... file  content

but pickle usage can directly load , dump string (have @ s in function names):

>>> import pickle >>> obj = 1 >>> serialized = pickle.dumps(obj) >>> serialized 'i1\n.' >>> pickle.loads(serialized) 1

but structured data stored in database, suggest in general either use

  • a table, preferable orm sqlalchemy directly mapped class or
  • a dictionary, (de)serialized json

and not using pickle @ all.


Comments

Post a Comment

Popular posts from this blog

java - Play! framework 2.0: How to display multiple image? -

i need display gallery of photos. here template: @(photos: list[photo]) @title = { <bold>gallery</bold> } @main(title,"photo"){ <ul class="thumbnails"> @for(photo <- photos) { <li class="span3"> <a href="#" class="thumbnail"> <img src="@photo.path" alt=""> </a> </li> } </ul> } and here controller method: public static result getphotos() { return ok(views.html.photo.gallery.render(photo.get())); } and here photo bean : @entity public class photo extends model { @id public long id; @required public string label; public string path; public photo(string path, string label) { this.path = path; this.label = label; } private static finder<long, photo> find = new finder<long, photo>( long.class, photo.class); public static list<phot...
Read more

gmail - Is there any documentation for read-only access to the Google Contacts API? -

i want read-only access user's google contacts. there stackoverflow member wanted this, , received following answer : yes, there is, use https://www.googleapis.com/auth/contacts.readonly scope , "view contacts". this exchange reference read-only access google contacts can find using google. simply using access token obtained attempt read usual google contacts api (i.e. https://www.google.com/m8/feeds ) fails insufficient permissions. similarly, using google contacts api on new target fails 404 errors (for example https://www.googleapis.com/auth/contacts.readonly/default/full ). is there documentation anywhere on how use api, or permissible way access google contacts api full read-write access?
Read more

php - Controller/JToolBar not working in Joomla 2.5 -

relevant code: jtoolbarhelper::custom('savecategories', 'save', '', 'save', false, false); ... <input type="hidden" name="controller" value="easyblogcontroller"> according can dig docs , own previous questions, should call savecategories() function in easyblogcontroller . i've tried setting value easyblog , easyblog.php (file name) current easyblogcontroller (class name). clicking on save button refreshes page. not redirect, echo or var_dump test code put in savecategories() function. var_dump ing jrequest::getvar('controller') , 'task' return correct values. creating controller object , using $controller->execute('task'); works. the values going depend on location of controller trying call, , have couple options here. typically there controller in base folder of component (likely components/com_easyblog) in file called controller.php , class name inside ...
Read more