Difference between revisions of "Python Examples"

From Info216
Line 28: Line 28:
  
 
</syntaxhighlight>
 
</syntaxhighlight>
 +
 +
 +
 +
===Coding Tasks Lab 1===
 +
<syntaxhighlight>
 +
 +
from rdflib.collection import Collection
 +
 +
 +
# Somtimes we want to add many objects for the same predicate at once.
 +
# In these cases we can use Collection() to save some time.
 +
 +
b = BNode()
 +
g.add((ex.Emma, ex.visit, b))
 +
Collection(g, b,
 +
    [ex.Portugal, ex.Italy, ex.France, ex.Germany, ex.Denmark, ex.Sweden])
 +
 +
# OR
 +
 +
g.add((ex.Emma, ex.visit, ex.EmmaVisits))
 +
Collection(g, ex.EmmaVisits,
 +
    [ex.Portugal, ex.Italy, ex.France, ex.Germany, ex.Denmark, ex.Sweden])
 +
 +
</syntaxhighlight>
 +
  
 
<div class="credits" style="text-align: right; direction: ltr; margin-left: 1em;">''INFO216, UiB, 2017-2020. All code examples are [https://creativecommons.org/choose/zero/ CC0].'' </div>
 
<div class="credits" style="text-align: right; direction: ltr; margin-left: 1em;">''INFO216, UiB, 2017-2020. All code examples are [https://creativecommons.org/choose/zero/ CC0].'' </div>

Revision as of 12:22, 24 January 2020

This page will be updated with Python examples related to the lectures and labs. We will add more examples after each lab has ended. The first examples will use Python's RDFlib. We will introduce other relevant libraries later.


Lecture 1: Python, RDFlib, and PyCharm

Coding Tasks Lab 1

from rdflib import Graph, Namespace, URIRef, BNode, Literal
from rdflib.namespace import RDF, FOAF, XSD

g = Graph()
ex = Namespace("http://example.org/")

g.add((ex.Cade, ex.married, ex.Mary))
g.add((ex.France, ex.capital, ex.Paris))
g.add((ex.Cade, ex.age, Literal("27", datatype=XSD.integer)))
g.add((ex.Mary, ex.age, Literal("26", datatype=XSD.integer)))
g.add((ex.Mary, ex.interest, ex.Hiking))
g.add((ex.Mary, ex.interest, ex.Chocolate))
g.add((ex.Mary, ex.interest, ex.Biology))
g.add((ex.Mary, RDF.type, ex.Student))
g.add((ex.Paris, RDF.type, ex.City))
g.add((ex.Paris, ex.locatedIn, ex.France))
g.add((ex.Cade, ex.characteristic, ex.Kind))
g.add((ex.Mary, ex.characteristic, ex.Kind))
g.add((ex.Mary, RDF.type, FOAF.Person))
g.add((ex.Cade, RDF.type, FOAF.Person))


Coding Tasks Lab 1

from rdflib.collection import Collection


# Somtimes we want to add many objects for the same predicate at once. 
# In these cases we can use Collection() to save some time.

b = BNode()
g.add((ex.Emma, ex.visit, b))
Collection(g, b,
    [ex.Portugal, ex.Italy, ex.France, ex.Germany, ex.Denmark, ex.Sweden])

# OR

g.add((ex.Emma, ex.visit, ex.EmmaVisits))
Collection(g, ex.EmmaVisits,
    [ex.Portugal, ex.Italy, ex.France, ex.Germany, ex.Denmark, ex.Sweden])


INFO216, UiB, 2017-2020. All code examples are CC0.