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Unidata / siphon

Siphon - A collection of Python utilities for retrieving atmospheric and oceanic data from remote sources, focusing on being able to retrieve data from Unidata data technologies, such as the THREDDS data server.

Home Page:https://unidata.github.io/siphon

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supress warnings.warn for catalog.py

raybellwaves opened this issue · comments

commented

I like the feature of parsing the URL and adding the catalog.xml.

It looks at though the warning messaged is displayed on the screen. I guess the string statement is suppose to not be printed.

from siphon.catalog import TDSCatalog
cat = TDSCatalog('https://thredds.ucar.edu/')
/home/ray/local/bin/anaconda3/envs/dev/lib/python3.8/site-packages/siphon/catalog.py:267: UserWarning: URL https://thredds.ucar.edu/thredds/catalog.html returned HTML. Changing to: https://thredds.ucar.edu/thredds/catalog.xml
  warnings.warn('URL {} returned HTML. Changing to: {}'.format(self.catalog_url,

i.e. the warnings.warn('URL {} returned HTML. Changing to: {}'.format(self.catalog_url,

commented

So that warning printing to screen is intentional. What it's saying that when you called:

cat = TDSCatalog('https://thredds.ucar.edu/')

the URL https://thredds.ucar.edu/thredds/catalog.html returned HTML, whereas TDSCatalog really wants a URL that returns XML. Now, it helpfully tries to open https://thredds.ucar.edu/thredds/catalog.xml and that works. What you really should do to silence the warning is change your code to:

cat = TDSCatalog('https://thredds.ucar.edu/thredds/catalog.xml')

The reason we leave the warning is to encourage users to fix their code to the latter.