Example queries return None

[latmarat]

Hello, I have a question about qmpy_rester usage. I tried a few example queries from the Readme file but, whatever I try, I keep getting None as a result. Do you know what could be the issue?
Thanks!

[mohanliu]

Yes. The reason is that our RESTful API for OQMD is still in the stage of internal test. We will release a new OQMD with RESTful API and some other features very soon. After that, you will be able to query data using this python wrapper. I will follow up with you once everything is ready.

[latmarat]

Thank you, looking forward to the new release!

[mohanliu]

The new OQMD is released! This API wrapper should be good now. Try it out and close the issue if everything looks fine.

[CompRhys]

From the query function:

def query_oqmd(i=0, offset=100):
    with qr.QMPYRester() as q:
        kwargs = {'limit':offset,'offset': i*offset, 'elements':'O'}
        # data = q.get_oqmd_phases(verbose=False, **kwargs)
        data = q.get_optimade_structures(verbose=False, **kwargs)
    return data["data"]

I have gotten the error:

File "/home/reag2/PhD/datasets/OQMD/script.py", line 13, in query_oqmd
    return data["data"]
TypeError: 'NoneType' object is not subscriptable

Is this a related issue?

[CompRhys]

From the query function:

def query_oqmd(i=0, offset=100):
    with qr.QMPYRester() as q:
        kwargs = {'limit':offset,'offset': i*offset, 'elements':'O'}
        # data = q.get_oqmd_phases(verbose=False, **kwargs)
        data = q.get_optimade_structures(verbose=False, **kwargs)
    return data["data"]

I have gotten the error:

File "/home/reag2/PhD/datasets/OQMD/script.py", line 13, in query_oqmd
    return data["data"]
TypeError: 'NoneType' object is not subscriptable

Is this a related issue?

This actually appears to be due to a gateway timeout. @mohanliu what are the access rules on making requests to the server? I had queried less than 3000 structures when it locked me out.

[tachyontraveler]

I increased the queue timeout on our web server now. I ran your script in my local system and it was able to download data from a query when I set the limit to be 3000. Lmk if this problem still persists.