cannot parse ISO-19115 XML records: 'list' object has no attribute 'title'

[johnolulu]

I recently upgraded my pycsw from 1.10.1 to 2.6.1. After upgrading, however, I am no longer able to load my ISO-19115 XML files into the pycsw database. I am running the pycsw-admin.py command as before:

/usr/share/pycsw/bin/pycsw-admin.py -c load_records -p /var/www/html/metadata/iso/ -f /usr/share/pycsw/default.cfg

But this now files fail to ingest all 968 of my ISO-19115 XML files with the same error:

Could not parse "/var/www/html/metadata/iso/ww3_samoa.xml" as an XML record
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/pycsw-2.6.1-py3.6.egg/pycsw/core/admin.py", line 348, in load_records
    record = metadata.parse_record(context, exml, repo)
  File "/usr/local/lib/python3.6/site-packages/pycsw-2.6.1-py3.6.egg/pycsw/core/metadata.py", line 117, in parse_record
    return _parse_metadata(context, repos, record)
  File "/usr/local/lib/python3.6/site-packages/pycsw-2.6.1-py3.6.egg/pycsw/core/metadata.py", line 142, in _parse_metadata
    return [_parse_iso(context, repos, exml)]
  File "/usr/local/lib/python3.6/site-packages/pycsw-2.6.1-py3.6.egg/pycsw/core/metadata.py", line 1250, in _parse_iso
    _set(context, recobj, 'pycsw:Title', md.identification.title)
**AttributeError: 'list' object has no attribute 'title'**

Here is the URL to our Web-accessible folder (WAF) of ISO-19115 XML files:

https://www.pacioos.hawaii.edu/metadata/iso/

And here is the URL to the specific ww3_samoa.xml given in the example above (although all of our files fail with the same error):

https://www.pacioos.hawaii.edu/metadata/iso/ww3_samoa.xml

Are you able to tell what is causing this error? These same files have all worked successfully for many years using pycsw 1.10.1 Many thanks for your help!

[pvgenuchten]

hi @johnolulu , not sure about that version, but in recent versions md.identification is a list object, so it would require md.identification[0].title, maybe you can pin your owslib to a lower version

see geopython/OWSLib@d4e26ea

[johnolulu]

Many thanks for the tip, @pvgenuchten! I can confirm that this was the issue.

So, apparently the latest pycsw release (pycsw-2.6.1) is not compatible with the latest OWSLib release (owslib-0.31.0). I needed to downgrade the Python owslib module to owslib-0.28.1 in order for pycsw-2.6.1 to work. As mentioned in the link you provided, the md.identificationinfo container element is no longer recognized in owslib-0.29+, and is instead replaced by md.identification itself, which must then be treated as a list.

It might help others bumping into this same problem to document this as a requirement for pycsw, until it can hopefully be updated to work with the newer OWSLib.