Jythonc :如何使用？

Question

我是jython的新手。这是我尝试使用javac将我的python脚本编译成类文件的失败。

    rohit@rohit-laptop:~/backyard$ echo "print 'hi'" > test.py
    rohit@rohit-laptop:~/backyard$ jython test.py 
    hi
    rohit@rohit-laptop:~/backyard$ jythonc test.py 
    Warning: jythonc is unmaintained and will not be included in Jython-2.3.  See http://jython.org/Project/jythonc.html for alternatives to jythonc.  Add '-i' to your invocation of jythonc to turn off this warning
    processing test

    Required packages:

    Creating adapters:

    Creating .java files:
      test module

    Compiling .java to .class...
    Compiling with args: ['/usr/bin/javac', '-classpath', '/usr/share/java/jython.jar:/usr/share/java/servlet-api-2.4.jar:/usr/share/java/libreadline-java.jar:./jpywork::/usr/share/jython/Tools/jythonc:/usr/share/jython/Lib:/usr/lib/site-python:__classpath__', './jpywork/test.java']
    0  
    rohit@rohit-laptop:~/backyard$ 
    rohit@rohit-laptop:~/backyard$ cd jpywork/
    rohit@rohit-laptop:~/backyard/jpywork$ ls
    test.class  test.java  test$_PyInner.class
    rohit@rohit-laptop:~/backyard/jpywork$ java test 
    Exception in thread "main" java.lang.NoClassDefFoundError: org/python/core/PyObject
    Caused by: java.lang.ClassNotFoundException: org.python.core.PyObject
        at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
    Could not find the main class: test. Program will exit.
    rohit@rohit-laptop:~/backyard/jpywork$

请建议正确的方法。

Answer 1

Jython会在第一次执行时自动编译成.class文件，但是如果你想编译它，你可以使用标准库，在Jython lib文件夹中找到py_compile.py或compileall.py。

Answer 2

$ java test # is not the exact command to execute the class file 

这个类文件需要jython.jar文件才能执行，您必须在运行时给出jython.jar路径。

#java -cp /home/litindia/jython-2.0.1/jython.jar:. test

-cp是强制的，/home/litindia/jython-2.0.1/jython.jar是我的路径，而jython.jar在我的系统中，你的路径可能会不同。所以请给出合适的路径。

在path之后，:.是强制的。则文件名为必填项。