Tom, executing that code, I get the following output:
[~/code/tompython] $rm -rf example_db/ && python testing.py /Library/Python/2.6/site-packages/jpype/_pykeywords.py:18: DeprecationWarning: the sets module is deprecated import sets Created: http://pypi.python.org/ Created: http://diveintopython.org/ Created: http://pypi2.python.org/ get one:<Node id=3> list_all_pages: <Node id=0> list_all_pages: <Node id=1> list_all_pages: <Node id=2> list_all_pages: <Node id=3> Traceback (most recent call last): File "testing.py", line 46, in <module> list_all_pages( ) File "testing.py", line 40, in list_all_pages for node in db.node: File "/Library/Python/2.6/site-packages/Neo4j.py-0.1_SNAPSHOT-py2.6.egg/neo4j/_core.py", line 307, in __getitem__ return Node(self.__neo, self.__backend.getNodeById(id)) jpype._jexception.RuntimeExceptionPyRaisable: org.neo4j.graphdb.NotFoundException: Node[4] Just confirmed with Tobias that the iteration to Node[4] is a bug in the Python bindings, since there is no node with that id in the db. Will get back to you on that. Cheers, /peter neubauer COO and Sales, Neo Technology GTalk: neubauer.peter Skype peter.neubauer Phone +46 704 106975 LinkedIn http://www.linkedin.com/in/neubauer Twitter http://twitter.com/peterneubauer http://www.neo4j.org - Your high performance graph database. http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. On Mon, Aug 2, 2010 at 10:13 AM, Peter Neubauer <[email protected]> wrote: > Tom, > I tried out you code, and with small adjustments, things are working > for me. Only thing is that the db.node iterator seems to go up to id 4 > which does not exist in the db. See the code below. Will check that > with Tobias and get some details on it. > > Does the code below work for you? > > /peter > > > > ------------------------------------------------------------- > import neo4j > > ######## A. DO SOME SETUP STUFF ############ > db = neo4j.GraphDatabase("example_db") > > pages = db.index("pages", create=True) # create an index called 'pages' > url = 'http://pypi2.python.org/' > > def create_page(url, code='' ): > page_node = pages[url] # does this page exist yet? > if not page_node: > page_node = db.node(url=url, code=code) # create a page > pages[url] = page_node # Add to index > print "Created:" , url > else: > print "Exists already:" , url > return page_node > > ######## B. ADD SOME PAGES ################# > with db.transaction: > create_page( 'http://pypi.python.org/' ) > create_page( 'http://diveintopython.org/' ) > create_page( 'http://pypi2.python.org/' ) > #create_python( 'http://stackoverflow.com/questions/tagged/python') > > ######## C. NOW GET SOME OUT ############### > def get_one(url): > with db.transaction: > node = pages [url ] > if node == None: > print "Node is none!" > return node > > print 'get one:' + str(get_one( url )) # fails > > ######### D. TRY TO ITERATE ################ > def list_all_pages( ): > #'Just iterate through the pages to make sure the data in in there...' > with db.transaction: > for node in db.node: > print 'list_all_pages: ' + str(node) > > def delete_one( url ): > '' > > list_all_pages( ) > > > ---------------------------------------------------------------------- > > Cheers, > > /peter neubauer > > COO and Sales, Neo Technology > > GTalk: neubauer.peter > Skype peter.neubauer > Phone +46 704 106975 > LinkedIn http://www.linkedin.com/in/neubauer > Twitter http://twitter.com/peterneubauer > > http://www.neo4j.org - Your high performance graph database. > http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. > > > > On Fri, Jul 30, 2010 at 5:19 PM, Tom Smith <[email protected]> wrote: >> >> On 30 Jul 2010, at 15:35, [email protected] wrote: >> >>> graphdb = neo4j.GraphDatabase("db") >>> with graphdb.transaction: >>> person = graphdb.node(name="Person") >>> peter = graphdb.node(name="Peter") >>> peter.IS_A(person) >>> print peter['name'] >>> graphdb.shutdown() >> >> >> >> Yes that works great... I think I'm having problems iterating the data once >> it is in. I'm trying to save data in from a simple web crawler... A and B >> below work OK. But C and D are hopeless. I'm assuming I don't HAVE to create >> a Traversal class to simply iterate through records... or is that not so? >> >> thanks, Tom >> >> >> >> ######## A. DO SOME SETUP STUFF ############ >> db = neo4j.GraphDatabase("example_db") >> >> pages = db.index("pages", create=True) # create an index called 'pages' >> url = 'http://pypi.python.org/' >> >> def create_page(url, code='' ): >> page_node = pages[url] # does this page exist yet? >> if not page_node: >> page_node = db.node(url=url, code=code) # create a page >> pages[url] = page_node # Add to index >> print "Created:" , url >> else: >> print "Exists already:" , url >> return page_node >> >> ######## B. ADD SOME PAGES ################# >> with db.transaction: >> create_page( 'http://pypi.python.org/' ) >> create_page( 'http://diveintopython.org/' ) >> create_page( 'http://pypi.python.org/' ) >> create_python( 'http://stackoverflow.com/questions/tagged/python') >> >> ######## C. NOW GET SOME OUT ############### >> def get_one(url): >> with db.transaction: >> node = pages [url ] >> if node == None: >> print "Node is none!" >> return node >> >> print get_one( url ) # fails >> >> ######### D. TRY TO ITERATE ################ >> def list_all_pages( ): >> 'Just iterate through the pages to make sure the data in in there... >> with db.transaction: >> for node in db.node: >> er... >> >> def delete_one( url ): >> '' >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> >> _______________________________________________ >> Neo4j mailing list >> [email protected] >> https://lists.neo4j.org/mailman/listinfo/user >> > _______________________________________________ Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
