Jython :哪些模块可用于PythonInterpreter，以及如何添加更多模块

Question

我正在使用Jython2.5.3 PythonInterpreter类来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，我会得到一个异常。我必须在CLASSPATH中添加一些jython库jars吗？

说明问题的窄缩代码：

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);
    }
}

仅在CLASSPATH中使用jython-2.5.3.jar运行上述操作失败，跟踪如下：

 [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)

Answer 1

您似乎使用的Jython文件不包括捆绑的Python文件( /Lib文件夹中的标准库)。我相信如果你用独立的罐子来代替它，应该会管用的。看见

• http://fwierzbicki.blogspot.se/2012/08/jython-253-final-released.html
• http://wiki.python.org/jython/InstallationInstructions