在 Python 中循环查询 SPARQL

Question

I have a task for looping a query SPARQL for each term. But i have no idea to process in a code, especially Python. I use the RDFlib for Python and my codes show below:

for joined in removed:
print (joined)

output:

sistem
pakar
diagnosis
penyakit
tht
balita
metode
certainty
factor

those terms have through text pre-processing. And after that i want to query those terms but in looping way. the query format:

qres = g.query(
"""SELECT ?z 
    WHERE {?x rdfs:label ?z .               
          FILTER CONTAINS (LCASE(str(?z)), LCASE ('THE_TERM')) .    
    }
    LIMIT 100""")

i am new to Python, so is there any way to process query for each term consecutively? or should i use switch and case function? please advise me, thank you.

Answer 1

There is no switch in Python!

See the documentation for rdflib regarding looping through query results here: https://rdflib.readthedocs.io/en/stable/intro_to_sparql.html

In short:

g = Graph()
# do something to load the graph with data

q = g.query("""SOME SPARQL QUERY""")
for r in g.query():
    print(r)
    # or
    print(r['x'])  # if you returned a variable ?x in your SPARQL query