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notmatthancock avatar notmatthancock commented on June 14, 2024 1

Also, to get counts from a query, you can just issue a count on the query, e.g.:

print pl.query(pl.Annotation).join(pl.Scan)\
        .filter(pl.Scan.patient_id == 'LIDC-IDRI-0011').count()
# 23

Alternatively, you can accomplish this same result by:

scan = pl.query(pl.Scan).filter(pl.Scan.patient_id == 'LIDC-IDRI-0011').first()
print len(scan.annotations)
# 23

from pylidc.

notmatthancock avatar notmatthancock commented on June 14, 2024

Scans and Annotation objects are stored in different tables, and so to do this type of query, you need a join clause. See here.

from pylidc.

fedorov avatar fedorov commented on June 14, 2024

Thank you! Sorry for the confusion.

from pylidc.

notmatthancock avatar notmatthancock commented on June 14, 2024

No problem. FYI, pylidc is implemented with sqlalchemy, which is where the filter, count, join, etc ... functions come from. sqlalchemy has nice documentation if you want to dive deeper into more complex query capabilities.

from pylidc.

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