【已解决】找到Jython编译py文件所生成的二进制的class文件

【背景】

【记录】有空去试试Jython

中的问题:

抱歉打扰一下,请问如果我用jython解析完python后,生成的字节码到了什么地方呢?呃我参照了Using jython的文档没有找到解决办法,在盘中搜索我原.py文件的文件名也没有找到,使用google也没有找到解决办法。。。。我需要用这个文件放到另一台只有JVM的机子上使用。诚盼解答,谢谢

即:

想办法,找到jython对于py所生成的二进制class文件。

 

【解决过程】

1.参考:

Jython generate class files

去先看看,jython支持哪些参数:

D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>jython --help
usage: jython [option] ... [-c cmd | -m mod | file | -] [arg] ...
Options and arguments:
-c cmd   : program passed in as string (terminates option list)
-Dprop=v : Set the property `prop' to value `v'
-C codec : Use a different codec when reading from the console.
-h       : print this help message and exit (also --help)
-i       : inspect interactively after running script
           and force prompts, even if stdin does not appear to be a terminal
-jar jar : program read from __run__.py in jar file
-m mod   : run library module as a script (terminates option list)
-Q arg   : division options: -Qold (default), -Qwarn, -Qwarnall, -Qnew
-S       : don't imply 'import site' on initialization
-u       : unbuffered binary stdout and stderr
-v       : verbose (trace import statements)
-V       : print the Python version number and exit (also --version)
-W arg   : warning control (arg is action:message:category:module:lineno)
file     : program read from script file
-        : program read from stdin (default; interactive mode if a tty)
arg ...  : arguments passed to program in sys.argv[1:]
Other environment variables:
JYTHONPATH: ';'-separated list of directories prefixed to the default module
            search path.  The result is sys.path.

试试的结果:

D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>jython -m compileall demoRunPythonUnderWindows.py
Listing demoRunPythonUnderWindows.py ...
Can't list demoRunPythonUnderWindows.py

很明显还是没有生成class文件。

2.参考:

Compiling Python Source to Real Java Classes

去试试jthonc:

D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>jythonc --help
'jythonc' is not recognized as an internal or external command,
operable program or batch file.

D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>jythonc
'jythonc' is not recognized as an internal or external command,
operable program or batch file.

很明显,找不到对应工具。

所以参考原帖去添加环境变量:

不过看到:

The previous section describes how Python classes can be created that subclass from Java classes.

以为其说是的上一章介绍了,如何生成class文件呢。

结果后来从:

Overview of Jython Documentation

->

Subclassing Java Classes in Jython

发现不是的,其只是jython和python互相调用。

3.再去添加环境变量,但是却遇到:

【已解决】虽已安装了jython后但找不到jythonc.py

4.最后,是用如下代码:

#!/usr/bin/python
# -*- coding: utf-8 -*-
"""
Function:
【已解决】找到Jython编译py文件所生成的二进制的class文件
http://www.crifan.com/try_find_where_the_jython_generated_binary_class_files_for_py_file

Author:     Crifan Li
Version:    2013-11-07
Contact:    http://www.crifan.com/about/me
"""

import os;
import compileall;
curDir = os.getcwd();
compileall.compile_dir(curDir); # compile py file in current dir

#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>ls
#compilePyToClass.py           demoRunPythonUnderWindows.py
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>python compilePyToClass.py
#Listing D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python ...
#Compiling D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python\compilePyToClass.py ...
#Compiling D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python\demoRunPythonUnderWindows.py ...
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>ls
#compilePyToClass.py            compilePyToClass.pyc           demoRunPythonUnderWindows.py   demoRunPythonUnderWindows.pyc
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>rm *.pyc
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>jython compilePyToClass.py
#Listing D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python ...
#Compiling D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python\compilePyToClass.py ...
#Compiling D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python\demoRunPythonUnderWindows.py ...
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>ls
#compilePyToClass$py.class           compilePyToClass.py                 demoRunPythonUnderWindows$py.class  demoRunPythonUnderWindows.py
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>rm *.class
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>compilePyToClass.py
#Listing D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python ...
#Compiling D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python\compilePyToClass.py ...
#Compiling D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python\demoRunPythonUnderWindows.py ...
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>ls
#compilePyToClass.py            compilePyToClass.pyc           demoRunPythonUnderWindows.py   demoRunPythonUnderWindows.pyc
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>rm *.pyc
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>

如图:

use compileall generate class from py

实现了:

编译当前路径下面的py文件

  • 如果用的是python,则生成的是.pyc文件
    • 不指定解析器,则调用默认的python
  • 如果的使用的是jython,则生成的是.class文件

 

【总结】

想要通过py文件获得对应的.class文件,则:

1.不能用jythonc了,因为已经被官网取消了。

2.可以使用compileall的方式。

代码为:

#!/usr/bin/python
# -*- coding: utf-8 -*-
"""
Function:
【已解决】找到Jython编译py文件所生成的二进制的class文件
http://www.crifan.com/try_find_where_the_jython_generated_binary_class_files_for_py_file

Author:     Crifan Li
Version:    2013-11-07
Contact:    http://www.crifan.com/about/me
"""

import os;
import compileall;
curDir = os.getcwd();
compileall.compile_dir(curDir); # compile py file in current dir

#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>ls
#compilePyToClass.py           demoRunPythonUnderWindows.py
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>python compilePyToClass.py
#Listing D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python ...
#Compiling D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python\compilePyToClass.py ...
#Compiling D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python\demoRunPythonUnderWindows.py ...
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>ls
#compilePyToClass.py            compilePyToClass.pyc           demoRunPythonUnderWindows.py   demoRunPythonUnderWindows.pyc
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>rm *.pyc
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>jython compilePyToClass.py
#Listing D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python ...
#Compiling D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python\compilePyToClass.py ...
#Compiling D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python\demoRunPythonUnderWindows.py ...
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>ls
#compilePyToClass$py.class           compilePyToClass.py                 demoRunPythonUnderWindows$py.class  demoRunPythonUnderWindows.py
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>rm *.class
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>compilePyToClass.py
#Listing D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python ...
#Compiling D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python\compilePyToClass.py ...
#Compiling D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python\demoRunPythonUnderWindows.py ...
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>ls
#compilePyToClass.py            compilePyToClass.pyc           demoRunPythonUnderWindows.py   demoRunPythonUnderWindows.pyc
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>rm *.pyc
#
#D:\tmp\tmp_dev_root\python\tutorial_summary\how_to_dev_python>

使用方式为:

把上面代码保存为compilePyToClass.py

然后放到你想要编译为.class的py所在路径。

然后运行:

jython compilePyToClass.py

即可将对应的,当前路径下的.py文件,生成对应的.class文件。

注:

1.生成的.class文件的文件名是

原文件名$py.class

的形式。



One Thought on “【已解决】找到Jython编译py文件所生成的二进制的class文件

  1. 你好,我想请教一下找到这个.class文件后,我怎样使用这个.class文件在java代码调用之前.py里的方法。

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