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 ):
> ''
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
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>
>
> _______________________________________________
> Neo4j mailing list
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> https://lists.neo4j.org/mailman/listinfo/user
>
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