How to use the collection()-function with saxonche

Question

I am trying to use the collection() -function using the new saxonche -Python-Module ( https://pypi.org/project/saxonche/ ).

I would expect, that it returns all XML-documents inside the current directory. Instead it just returns None .

My code looks like:

from saxonche import PySaxonProcessor
from os import getcwd

with PySaxonProcessor(license=False) as proc:
    print(proc.version)
    xq = proc.new_xquery_processor()
    xq.set_query_base_uri(getcwd())
    xq.set_query_content("collection('.')/node()")
    r = xq.run_query_to_value()
    print(r)

Any suggestions?

Answer 1

I get the suggested collection('?select=*.xml') to work if I use eg

from pathlib import Path

and then set

xq.set_query_base_uri(Path('.', 'foo.xml').absolute().as_uri())

Answer 2

For the method set_query_base_uri the documentation (ie https://www.saxonica.com/saxon-c/doc12/html/saxonc.html#PyXQueryProcessor-set_query_base_uri ) states:

set_query_base_uri(self, base_uri)

Set the static base URI for the query.

Args: base_uri (str): The static base URI; or None to indicate that no base URI is available

Therefore we need to supply URI as a string. See another solution below which is based on the first one:

  from saxonche import PySaxonProcessor
  from os import getcwd

  with PySaxonProcessor(license=False) as proc:
    print(proc.version)
    xq = proc.new_xquery_processor()
    xq.set_query_base_uri('file://'+getcwd()+'/')
    xq.set_query_content("collection('?select=*.xml')")
    r = xq.run_query_to_value()
    print(r)