无法得出最终结果，以及代码转换python问题 #51
Description
您好！
我是一名学生，我运行了您的gAnswer代码，结果只能得到5个Sparql语句，无法得到最终答案，错误结果如下，请问是哪出错了呢？还有，我的导师最近让我将您的gAnswer的java代码用python复现一下，可是我看您的代码调用了许多java的jar包，请问您对如何使用python实现有什么建议吗？感谢！
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
at java.base/sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1982)
at java.base/sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1977)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:554)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1976)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1544)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1528)
at jgsc.GstoreConnector.sendGet(GstoreConnector.java:67)
at jgsc.GstoreConnector.query(GstoreConnector.java:264)
at qa.GAnswer.getAnswerFromGStore2(GAnswer.java:157)
at qa.GAnswer.main(GAnswer.java:250)
Caused by: java.io.FileNotFoundException: http://dbpedia20.gstore-pku.com:80/%3Foperation%3Dquery%26username%3Droot%26password%3D123456%26db_name%3Ddbpedia16%26format%3Dtxt%26sparql%3Dselect+DISTINCT+%3Fwife++where+%7B+%3CBarack_Obama%3E%09%3Cspouse%3E%09%3Fwife.+%7D+LIMIT+100
at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1928)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1528)
at java.base/sun.net.www.protocol.http.HttpURLConnection.getHeaderFields(HttpURLConnection.java:3152)
at jgsc.GstoreConnector.sendGet(GstoreConnector.java:64)
... 3 more