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POClass variable dictionary not saving with pickle.dump in python 2.7
 

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  1. POClass variable dictionary not saving with pickle.dump in python 2.7
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    <p>I am using pickle to save an object graph by dumping the root. When I load the root it has all the instance variables and connected object nodes. However I am saving all the nodes in a class variable of type dictionary. The class variable is full before being saved but after I unpickle the data it is empty.</p> <p>Here is the class I am using:</p> <pre><code>class Page(): __crawled = {} def __init__(self, title = '', link = '', relatedURLs = []): self.__title = title self.__link = link self.__relatedURLs = relatedURLs self.__related = [] @property def relatedURLs(self): return self.__relatedURLs @property def title(self): return self.__title @property def related(self): return self.__related @property def crawled(self): return self.__crawled def crawl(self,url): if url not in self.__crawled: webpage = urlopen(url).read() patFinderTitle = re.compile('&lt;title&gt;(.*)&lt;/title&gt;') patFinderLink = re.compile('&lt;link rel="canonical" href="([^"]*)" /&gt;') patFinderRelated = re.compile('&lt;li&gt;&lt;a href="([^"]*)"') findPatTitle = re.findall(patFinderTitle, webpage) findPatLink = re.findall(patFinderLink, webpage) findPatRelated = re.findall(patFinderRelated, webpage) newPage = Page(findPatTitle,findPatLink,findPatRelated) self.__related.append(newPage) self.__crawled[url] = newPage else: self.__related.append(self.__crawled[url]) def crawlRelated(self): for link in self.__relatedURLs: self.crawl(link) </code></pre> <p>I save it like such:</p> <pre><code>with open('medTwiceGraph.dat','w') as outf: pickle.dump(root,outf) </code></pre> <p>and I load it like such:</p> <pre><code>def loadGraph(filename): #returns root with open(filename,'r') as inf: return pickle.load(inf) root = loadGraph('medTwiceGraph.dat') </code></pre> <p>All the data loads except for the class variable __crawled.</p> <p>What am I doing wrong?</p>
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    1. USJoel Green
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      1. VTUpMod
    1. COYou don't seem to be using new-style classes: `class Page(object):`.
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      1. USBlender
    2. COThis did not help but where can I read more about new-style objects? I just started python coming from java, so I'm not totally sure what I'm doing yet.
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      1. USJoel Green
 

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