我有一个小型 wsgi 应用程序,运行本地 Cherry 服务器,我使用 RDFlib 将人类语言查询转换为 SPARQL 查询,以查询加载到 fuseki 的 ttl 文件。它有效,但速度非常慢!这个脚本的上一版本直接接受 SPARQL 查询,所以我没有使用 RDFlib,而且运行速度非常快!我使用 RDFlib 的方式有什么问题导致它这么慢吗?
from abc import ABCMeta, abstractmethod, abstractproperty
from collections import OrderedDict
from threading import Thread
from time import sleep
from cherrypy import engine
from cherrypy.wsgiserver import CherryPyWSGIServer
from werkzeug.wsgi import DispatcherMiddleware
from werkzeug.debug import DebuggedApplication
from werkzeug.wsgi import SharedDataMiddleware
from werkzeug.wrappers import Response, Request
from requests import get, post, RequestException
from jinja2 import Environment, FileSystemLoader
import os
from SPARQLWrapper import SPARQLWrapper, JSON
import rdflib
__author__ = 'authorname'
templates_dir = os.path.abspath('templates')
static_dir = os.path.abspath('static')
class RdfDemoApp(object):
def __init__(self, sparql_endpoint_address):
self._sparql_endpoint_address = sparql_endpoint_address
self._jinja_env = Environment(loader=FileSystemLoader(templates_dir), autoescape=True)
def render_template(self, template, **params):
t = self._jinja_env.get_template(template)
return t.render(params)
def _app(self, environ, start_response):
request = Request(environ)
if 'query' in request.args.keys():
query_string = "'"+request.args['query']+"'"
print query_string
results = g.query("""PREFIX pers: <http://blabla.com/Register/schemas/persons/>
SELECT ?person ?sibling ?sibforname
WHERE {
?person pers:name ?name .
?name pers:forename """+query_string+""" .
?person pers:siblingOf ?sibling .
?sibling pers:name ?sibname .
?sibname pers:forename ?sibforname .
?sibname pers:type "std" } """)#, format = "JSON")
for row in results:
print row
header = []
i=0
for item in results:
while i in range(len(item)):
for x in item:
header.append(x)
i+=1
quer = query_string
response = Response(self.render_template('results_rdf.html', results=results, header = header, query = quer, static_dir = static_dir ), mimetype='text/html')
else:
response = Response(self.render_template('form_rdf.html'), mimetype='text/html')
return response(environ, start_response)
def __call__(self, environ, start_response):
app = SharedDataMiddleware(DebuggedApplication(self._app, evalex=True), {
'/static': static_dir
})
return app(environ, start_response)
if __name__ == '__main__':
g=rdflib.Graph()
g.parse("/Users/username/Documents/pers_file_new.ttl", format='n3')
wsgi_app = RdfDemoApp("http://localhost:3030/ds/query")
try:
server = CherryPyWSGIServer(('127.0.0.1',10001), wsgi_app)
server.start()
except KeyboardInterrupt:
server.stop()
print "Logged out"