Tools and libraries
Tutorials and Manual pages
- Quick start tutorials
- Visualization
- Clustering
- Classifier
- Regression
- Neural networks
- JSON
Python
Resize images or create thumbnail images
from PIL import Image
import matplotlib.pyplot as plot
imgfile = Image.open("flower.jpg")
#resize image to 200px x 200 px using ANTIALIAS interpolation
imgfile = imgfile.resize([200, 200], Image.ANTIALIAS)
plot.imshow(imgfile)
plot.show()
Create thumbnail images
from PIL import Image
import matplotlib.pyplot as plot
imgfile = Image.open("flower.jpg")
imgfile.thumbnail([200, 200], Image.ANTIALIAS)
plot.imshow(imgfile)
plot.show()
Create JSON data
import json
colors = [[120, 30, 120], [150, 30, 10]]
user = "user 1"
data = dict()
data['user'] = user
data['colors'] = colors
print(json.dumps(data))
Write JSON data to file
import json
colors = [[120, 30, 120], [150, 30, 10]]
user = "user 1"
data = dict()
data['user'] = user
data['colors'] = colors
with open("user.json", "w") as file:
json.dump(data, file)
file.close()
Read JSON data from file
import json
data = ""
with open("user.json", "r") as file:
data = json.load(file)
print(data)
SPARQL queries
Get names of 100 programming languages.
SELECT ?languageLabel (YEAR(?inception) as ?year)
WHERE
{
#instances of programming language
?language wdt:P31 wd:Q9143;
wdt:P571 ?inception;
rdfs:label ?languageLabel.
FILTER(lang(?languageLabel) = "en")
}
ORDER BY ?year
LIMIT 100
Get names of 100 programming languages and their paradigms.
SELECT ?languageLabel ?paradigmLabel (YEAR(?inception) as ?year)
WHERE
{
#instances of programming language
?language wdt:P31 wd:Q9143;
wdt:P571 ?inception; #inception
wdt:P3966 ?paradigm; #programming language paradigm
rdfs:label ?languageLabel. #label
?paradigm rdfs:label ?paradigmLabel #label
FILTER(lang(?languageLabel) = "en" && lang(?paradigmLabel) = "en") #English
}
ORDER BY ?year ?paradigmLabel
LIMIT 100
Get available information of population of different countries at different periods of time.
SELECT DISTINCT ?countryLabel (YEAR(?date) as ?year) ?population
WHERE {
?country wdt:P31 wd:Q6256; #Country
p:P1082 ?populationStatement;
rdfs:label ?countryLabel. #Label
?populationStatement ps:P1082 ?population; #population
pq:P585 ?date. #period in time
FILTER(lang(?countryLabel)="en") #Label in English
}
ORDER by ?countryLabel ?year
LIMIT 1000
Get population of France at different periods of time.
SELECT (YEAR(?date) as ?year)?population
WHERE
{
VALUES ?country {wd:Q142}
?country p:P1082 ?populationStatement.
?populationStatement ps:P1082 ?population;
pq:P585 ?date.
}
ORDER by ?year
Get number of programming languages released every year.
SELECT ?year (COUNT(?programmingLanguage) as ?count)
WHERE
{
?programmingLanguage wdt:P31/wdt:P279* wd:Q9143;
wdt:P571 ?date.
BIND(YEAR(?date) as ?year)
}
GROUP BY ?year
ORDER by ?year
Get number of programming languages released every year belonging to different paradigms.
SELECT ?year ?paradigmLabel (COUNT(?programmingLanguage) as ?count)
WHERE
{
?programmingLanguage wdt:P31/wdt:P279* wd:Q9143;
wdt:P3966 ?paradigm;
wdt:P571 ?date.
?paradigm rdfs:label ?paradigmLabel FILTER(lang(?paradigmLabel)="en").
BIND(YEAR(?date) as ?year)
}
GROUP BY ?year ?paradigmLabel
ORDER by ?year ?paradigmLabel
Get number of softwares released every year.
SELECT ?year (COUNT(?software) as ?count)
WHERE
{
?software wdt:P31/wdt:P279* wd:Q7397;
wdt:P571 ?date.
BIND(YEAR(?date) as ?year)
}
GROUP BY ?year
ORDER by ?year
Standards and tools
