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b4lls4ck

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•Created by b4lls4ck on 11/27/2024 in #questions

Index Creation Help

Hi, I fixed the issue by changing my first third command listed above to

:remote connect tinkerpop.server conf/remote.yaml session

:remote connect tinkerpop.server conf/remote.yaml session

. However I do have some persisting issues and confusions which I will send soon.

4 replies

JJanusGraph

•Created by b4lls4ck on 11/27/2024 in #questions

Index Creation Help

Hi, I have tried to create indexes but I am running into issues. I am using the Docker image to jave a JanusGraph instance on my machine and I am using the gremlin console within the Docker container to create a composite index as follows: 1. I go into the Docker container via the

docker exec -it janausgraph-container bash

docker exec -it janausgraph-container bash

command 2. Once in the Docker container I run

./bin/gremlin.sh

./bin/gremlin.sh

to start up the gremlin console 3. I run

:remote connect tinkerpop.server conf/remote.yaml

:remote connect tinkerpop.server conf/remote.yaml

and then

:remote console

:remote console

which then outputs

==>All scripts will now be sent to Gremlin Server = [localhost/127.0.0.1:8182] - type ':remote console' to return to local mode

==>All scripts will now be sent to Gremlin Server = [localhost/127.0.0.1:8182] - type ':remote console' to return to local mode

4. I then run

mgmt = graph.openManagement()

mgmt = graph.openManagement()

which outputs

==>org.janusgraph.graphdb.database.management.ManagementSystem@16015e12

==>org.janusgraph.graphdb.database.management.ManagementSystem@16015e12

5. I then run

nameProperty = mgmt.makePropertyKey("name").dataType(String.class).make()

nameProperty = mgmt.makePropertyKey("name").dataType(String.class).make()

Which unfortunately appears to give me an error saying in the stack trace:

groovy.lang.MissingPropertyException: No such property: mgmt for class: Script5

groovy.lang.MissingPropertyException: No such property: mgmt for class: Script5

I am very confused as to why this is happening and would appreciate any assistance/troubleshooting

4 replies

JJanusGraph

•Created by b4lls4ck on 8/23/2024 in #questions

Speeding up Queries Made to JanusGraph

Hi @cdegroc Thank you so much for your response, may you please explain how someone can go about creating a Composite index? What is the difference between Graph Index, Vertex Centric Index, and Composite Index? I took a look at the link you sent, should the commands be run in a groovy console?

31 replies

JJanusGraph

•Created by b4lls4ck on 8/23/2024 in #questions

Speeding up Queries Made to JanusGraph

Hi everyone , thank you for responding, may someone please explain how to create an index in Python? This is assuming that creating an index will speed up performance of queries

31 replies

ATApache TinkerPop

•Created by b4lls4ck on 8/1/2024 in #questions

How to find the edges of a node that have a weight of x or greater?

Thank you, this helped me fix my problem 🙂

8 replies

ATApache TinkerPop

•Created by b4lls4ck on 8/1/2024 in #questions

How to find the edges of a node that have a weight of x or greater?

Also btw, I am assuming the way I am setting weights for the edges is correct:

person_A_node = g.V().has("person", "name", "A").to_list()[0] # this node represents person A

person_B_node = g.V().has("person", "name", "B").to_list()[0] # this node represents person B

person_C_node = g.V().has("person", "name", "C").to_list()[0] # this node represents person C

g.V(person_A_node).add_e("is friends with").to(person_B_node).property("weight", 0.9).iterate()
g.V(person_A_node).add_e("is friends with").to(person_C_node).property("weight", 0.7).iterate()

person_A_node = g.V().has("person", "name", "A").to_list()[0] # this node represents person A

person_B_node = g.V().has("person", "name", "B").to_list()[0] # this node represents person B

person_C_node = g.V().has("person", "name", "C").to_list()[0] # this node represents person C

g.V(person_A_node).add_e("is friends with").to(person_B_node).property("weight", 0.9).iterate()
g.V(person_A_node).add_e("is friends with").to(person_C_node).property("weight", 0.7).iterate()

8 replies

ATApache TinkerPop

•Created by b4lls4ck on 8/1/2024 in #questions

How to find the edges of a node that have a weight of x or greater?

Oh yeah, I also tried that, and for some reason, it didn't work. My query was as follows:

from gremlin_python.process.traversal import P
a_friends = g.V().has("person", "name", "A").out("is friends with").has("weight", P.gt(0.75)).inV().to_list()

from gremlin_python.process.traversal import P
a_friends = g.V().has("person", "name", "A").out("is friends with").has("weight", P.gt(0.75)).inV().to_list()

And it returned an empty list even though I have that person C has a weight of 0.9 with person A

8 replies

JJanusGraph

•Created by b4lls4ck on 7/18/2024 in #questions

Is there a suitable JanusGraph visualizer where you can see your created graphs?

I am leaning more towards a free visualization software

8 replies

JJanusGraph

•Created by b4lls4ck on 7/18/2024 in #questions

Is there a suitable JanusGraph visualizer where you can see your created graphs?

Okay thank you! I'll take a look at these and see what they got, will come back with any questions I may have about them

8 replies

JJanusGraph

•Created by b4lls4ck on 7/18/2024 in #questions

Is there a suitable JanusGraph visualizer where you can see your created graphs?

Thank you for sharing this, I am assuming after looking at pricing that it will cost $50/month to have it set up with JanusGraph?

8 replies

ATApache TinkerPop

•Created by b4lls4ck on 7/9/2024 in #questions

I am unsure on how to use Python to add graphs to JanusGraph

Wow That fixed it! thank you so much! I really appreciate your help and your super detailed explanations, thank you!!!!! Will post any other questions I have on a new thread if I have

56 replies

ATApache TinkerPop

•Created by b4lls4ck on 7/9/2024 in #questions

I am unsure on how to use Python to add graphs to JanusGraph

it's quite a lot to send here , but the output of my docker logs are equivalent to what gets printed when starting the Janus Graph container itself, My Python script has been modified to look like this:

from gremlin_python.driver.driver_remote_connection import DriverRemoteConnection
from gremlin_python.process.anonymous_traversal import traversal
from janusgraph_python.driver.serializer import JanusGraphSONSerializersV3d0

g = traversal().with_remote(DriverRemoteConnection('ws://localhost:8182/gremlin','g',message_serializer=JanusGraphSONSerializersV3d0()))

v1 = g.add_v("person").property("name", "John").next()
print(v1)
v2 = g.add_v("person").property("name", "Mary").next()
print(v2)
e = g.V(v1).add_e("knows").to(v2).iterate()
print(g.V().has("person", "name", "John").out("knows").values("name").to_list())

from gremlin_python.driver.driver_remote_connection import DriverRemoteConnection
from gremlin_python.process.anonymous_traversal import traversal
from janusgraph_python.driver.serializer import JanusGraphSONSerializersV3d0

g = traversal().with_remote(DriverRemoteConnection('ws://localhost:8182/gremlin','g',message_serializer=JanusGraphSONSerializersV3d0()))

v1 = g.add_v("person").property("name", "John").next()
print(v1)
v2 = g.add_v("person").property("name", "Mary").next()
print(v2)
e = g.V(v1).add_e("knows").to(v2).iterate()
print(g.V().has("person", "name", "John").out("knows").values("name").to_list())

What is outputted is the following, still getting similar error , but I am now able to successfully add vertices using the add_v method, create an edge between the two vertices using add_e method, and print out the name of the person that John knows (Mary):

v[4184]
v[8296]
['Mary']
Error on reading from the event loop self pipe
loop: <ProactorEventLoop running=True closed=False debug=False>
Traceback (most recent call last):
  File "C:\Python312\Lib\asyncio\proactor_events.py", line802, in _loop_self_reading
.
.
.
OSError: [WinError 87] The parameter is incorrect
Error on reading from the event loop self pipe
loop: <ProactorEventLoop running=True closed=False debug=False>

v[4184]
v[8296]
['Mary']
Error on reading from the event loop self pipe
loop: <ProactorEventLoop running=True closed=False debug=False>
Traceback (most recent call last):
  File "C:\Python312\Lib\asyncio\proactor_events.py", line802, in _loop_self_reading
.
.
.
OSError: [WinError 87] The parameter is incorrect
Error on reading from the event loop self pipe
loop: <ProactorEventLoop running=True closed=False debug=False>

It's just I still get the OSError WinError 87 ,

56 replies

ATApache TinkerPop

•Created by b4lls4ck on 7/9/2024 in #questions

I am unsure on how to use Python to add graphs to JanusGraph

Hi @Florian Hockmann Thank you for letting me know that Janus doesn't have official Windows support, I have used the Docker container, and in this message I am replying to, I go into detail about the error I would get when using the Docker container, are there any suggestions or ways I could address this issue?

56 replies

ATApache TinkerPop

•Created by b4lls4ck on 7/9/2024 in #questions

I am unsure on how to use Python to add graphs to JanusGraph

Now in JanusGraph 1.0.0. distribution, there is a gremlin-server.bat file which I can run as I am on Windows, upon running it, it says it has connected to port 8182. I run my Python script afterwards

g = traversal().with_remote(DriverRemoteConnection('ws://localhost:8182/gremlin','g'))
v1=g.add_v("person").property("name", "John").next()

g = traversal().with_remote(DriverRemoteConnection('ws://localhost:8182/gremlin','g'))
v1=g.add_v("person").property("name", "John").next()

and I get an error outputted by the Python script saying

gremlin_python.driver.protocol.GremlinServerError: 499: The traversal source [g] for alias [g] is not configured on the server. bin/gremlin-server.sh conf/gremlin-server/gremlin-server-configuration.yaml
.
.
.
OSError: [WinError 87] The parameter is incorrect

gremlin_python.driver.protocol.GremlinServerError: 499: The traversal source [g] for alias [g] is not configured on the server. bin/gremlin-server.sh conf/gremlin-server/gremlin-server-configuration.yaml
.
.
.
OSError: [WinError 87] The parameter is incorrect

Now I will try out the add on above involving serialization, but do you think this different error could be due to another reason?

56 replies

ATApache TinkerPop

•Created by b4lls4ck on 7/9/2024 in #questions

I am unsure on how to use Python to add graphs to JanusGraph

Yes exactly, I am running a Janus Server in that docker container

56 replies

ATApache TinkerPop

•Created by b4lls4ck on 7/9/2024 in #questions

I am unsure on how to use Python to add graphs to JanusGraph

Is there any way of starting a JanusGraph server in Windows? I cannot run the /bin/janusgraph-server.sh script as I am on Windows, and there is no /bin/janusgraph-server.bat file included in the JanusGraph distribution I downloaded (1.0.0). This is the very reason why I am using Docker instead

56 replies

ATApache TinkerPop

•Created by b4lls4ck on 7/9/2024 in #questions

I am unsure on how to use Python to add graphs to JanusGraph

Thanks for sharing the Python examples, they look very helpful

56 replies

ATApache TinkerPop

•Created by b4lls4ck on 7/9/2024 in #questions

I am unsure on how to use Python to add graphs to JanusGraph

I am using docker to run JanusGraph and I ran a command that is similar to the first command listed on this page: https://docs.janusgraph.org/getting-started/installation/ The exact command I run is:

docker run -it -p 8182:8182 --name janusgraph-default janusgraph/jannusgraph:latest

docker run -it -p 8182:8182 --name janusgraph-default janusgraph/jannusgraph:latest

which is similar to that first command on that page. I needed to modify it because i need to map port 8182 of the JanusGraph container to port 8182 of my machine (the host machine). Without the "-it -p 8182:8182" part I would get the following error when running the python script:

aiohttp.client_exceptions.ClientConnectorError: Cannot connect to host localhost:8182 ssl:default [The remote computer refused the network connection]
Unclosed client session
client_session: <aiohttp.client.ClientSession object at 0x000001FFAA7B2210>

aiohttp.client_exceptions.ClientConnectorError: Cannot connect to host localhost:8182 ssl:default [The remote computer refused the network connection]
Unclosed client session
client_session: <aiohttp.client.ClientSession object at 0x000001FFAA7B2210>

But since I am mapping the port of the container to the port of my machine, I am no longer getting that error, and am now facing this new error mentioned earlier So I would say that my python script is connecting to JanusGraph as opposed to the Gremlin Server

56 replies

ATApache TinkerPop

•Created by b4lls4ck on 7/9/2024 in #questions

I am unsure on how to use Python to add graphs to JanusGraph

I am not too sure on why this would be occurring , I have seen it a couple of times

56 replies

ATApache TinkerPop

•Created by b4lls4ck on 7/9/2024 in #questions

I am unsure on how to use Python to add graphs to JanusGraph

Which is what I had in my code, and it would yield the following error:

KeyError: <DataType.custom: 0>
Error on reading from the event loop self pipe
loop: <ProactorEventLoop running=True closed=False debug=False>
....
OSError: [WinError 87] The parameter is incorrect

KeyError: <DataType.custom: 0>
Error on reading from the event loop self pipe
loop: <ProactorEventLoop running=True closed=False debug=False>
....
OSError: [WinError 87] The parameter is incorrect

56 replies

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