问题描述
我正在使用 Jython 2.5.3 PythonInterpreter
类评估一些简单的脚本,但是当我需要导入任何非核心模块时,会遇到异常.我是否必须在CLASSPATH中添加一些jython库jar?
I am using the Jython 2.5.3 PythonInterpreter
class to evaluate some simple scripts but when I need to import any non-core modules I get an exception. Do I have to add some jython library jars in the CLASSPATH?
展示问题的缩小代码:
import org.python.core.*;
import org.python.util.PythonInterpreter;
public class JythonTest {
public static void main(String args[]) throws Exception {
String scriptA = "import json"; // "import datetime" fails as well
PythonInterpreter pi = new PythonInterpreter();
PyCode code = pi.compile(scriptA);
PyObject result = pi.eval(code);
}
}
仅使用CLASSPATH中的 jython-2.5.3.jar 运行上述操作,并失败,并显示以下跟踪信息:
Running the above with only jython-2.5.3.jar in the CLASSPATH fails with the following trace:
[java] ImportError: No module named json
[java]
[java] at org.python.core.Py.ImportError(Py.java:304)
[java] at org.python.core.imp.import_first(imp.java:755)
[java] at org.python.core.imp.import_module_level(imp.java:837)
[java] at org.python.core.imp.importName(imp.java:917)
[java] at org.python.core.ImportFunction.__call__(__builtin__.java:1220)
[java] at org.python.core.PyObject.__call__(PyObject.java:357)
[java] at org.python.core.__builtin__.__import__(__builtin__.java:1173)
[java] at org.python.core.imp.importOne(imp.java:936)
[java] at org.python.pycode._pyx0.f$0(<script>:2)
[java] at org.python.pycode._pyx0.call_function(<script>)
[java] at org.python.core.PyTableCode.call(PyTableCode.java:165)
[java] at org.python.core.PyCode.call(PyCode.java:18)
[java] at org.python.core.Py.runCode(Py.java:1275)
[java] at org.python.core.__builtin__.eval(__builtin__.java:484)
[java] at org.python.core.__builtin__.eval(__builtin__.java:488)
[java] at org.python.util.PythonInterpreter.eval(PythonInterpreter.java:198)
[java] at JythonTest.main(JythonTest.java:10)
推荐答案
您似乎正在使用Jython jar文件,该文件不包含捆绑的Python文件(/Lib
文件夹中的标准库).我相信,如果您使用独立的jar代替,它应该可以工作.参见
You seem to be using the Jython jar file that doesn't include the bundled Python files (the standard library in the /Lib
folder). I believe it should work if you use the standalone jar instead. See
- http://fwierzbicki.blogspot.se/2012/08/jython-253-final-released.html
- http://wiki.python.org/jython/InstallationInstructions
- http://fwierzbicki.blogspot.se/2012/08/jython-253-final-released.html
- http://wiki.python.org/jython/InstallationInstructions
这篇关于Jython :: PythonInterpreter可以使用哪些模块,以及如何添加更多模块的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!