Python : SpaqrlWrapper, Timeout?

Question

I am new to python as well as new to the world of querying the semantic web. I am using SPARQLWrapper library to query dbpedia, I searched the library documentation but failed to find 'timeout' for a query fired to dbpedia from sparqlWrapper.

Anyone has any idea about the same.

score 2 · Answer 1 · answered Dec 03 '19 at 10:40

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As of 2018, you can use SPARQLWrapper.setTimeout() to set the timeout for SPARQLWrapper requests.

answered Dec 03 '19 at 10:40

Karoo

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score 1 · Answer 2 · answered Jun 28 '20 at 16:26

As Karoo mentioned you can use SPARQLWrapper.setTimeout(timeout=(int)). If you want a timeout as a float, go to the Wrapper.py module and change self.timeout = int(timeout) to self.timeout = float(timeout) in the def setTimeout(self, timeout): function.

cubexy · Answer 3 · 2022-05-19T08:09:22.493

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I don't know if this is specifically an answer for your question, but I searched for it for ages and heres my solution for anyone else having trouble with Virtuoso specific timeouts on SPARQLWrapper:

Your can use this line of code to set a server-side timeout for your queries (not clientside like .setTimeout):

[your SPARQLWrapper entity].addExtraURITag("timeout","[your timeout in ms]")

In my case it looks like this:

s.addExtraURITag("timeout","10000")

This should give you 10 seconds of time before your query stops searching and returns results instead of just giving you a Timeout error.

Hope I could help anyone.

edited May 19 '22 at 08:09

answered Jan 16 '21 at 01:14

cubexy

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Thanks for this but even after setting the timeout to 0 i.e. to run completely, sometimes I get a partial response, any ideas why? [dbpedia-partial-result](https://www.dbpedia.org/resources/sparql/#:~:text=Partial%20Results%20for%20Timed%2DOut%20Queries%20(Anytime%20Queries)) [timeout 0 settings](http://docs.openlinksw.com/virtuoso/anytimequeries/#:~:text=Setting%20the%20timeout%20to%200%20returns%20to%20the%20default%20state%20of%20having%20no%20limit%20on%20query%20run%20time%20and%20always%20returning%20complete%20results.) – Shubham Srivastava Jun 16 '22 at 06:34
@ShubhamSrivastava Sounds like there is a default timeout that is used! – cubexy Aug 30 '22 at 09:05
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good guess. It looks like this specific to DBpedia, they have a MaxQueryExecutionTime of 120sec, so even if we set it to 0 in code, they are maintaining a default settings. – Shubham Srivastava Aug 30 '22 at 11:06

score 0 · Accepted Answer · answered Dec 06 '13 at 08:12

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DBPedia uses Virtuoso server for it's endpoint and timeout is a virtuoso-specific option. SparqlWrapper doesn't currently support it.

Next version will feature better modularity and proper vendor-specific extensions might be implemented after that, but I guess you don't have time to wait.

Currently, the only way to add such parameter is to manually hardcode it into your local version of library

answered Dec 06 '13 at 08:12

JimiDini

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True, I guess the only option now is to manually code the timeout. BTW thanks for writing back, I felt that wasn't able to locate the timeout in the library and was searching for it all the while. This marks end to my search ;) – Ankit Solanki Dec 06 '13 at 15:09

Python : SpaqrlWrapper, Timeout?

4 Answers4