>>> import java
>>>


Small nit: Jython does implement a number of implementation-specific modules in its version of the standard library; jarray comes to mind, which is mostly but not completely superseded by the standard array module.
However, the java package namespace is not part of the standard library, it's part of the standard Java ecosystem and it's due to a builtin import hook:

Jython 2.7b3+ (default:6cee6fef06f0, Jun 9 2014, 22:29:14)
[Java HotSpot(TM) 64-Bit Server VM (Oracle Corporation)] on java1.7.0_60
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', '/home/jbaker/jythondev/jython27/dist/Lib', '__classpath__', '__pyclasspath__/', '/home/jbaker/.local/lib/jython2.7/site-packages', '/home/jbaker/jythondev/jython27/dist/Lib/site-packages']

The entry __classpath__ means search CLASSPATH for Java packages; this includes the Java runtime, rt.jar, from which you get package namespaces as java.*, javax.*, sun.*, etc.

Another behavior that you get for free in Jython is being able to also import the org.python.* namespace, which is Jython's own runtime. Some of the implementations of standard library modules, such as threading, take advantage of this support.

- Jim

">

(original) (raw)

On Mon, Jun 9, 2014 at 9:03 PM, Steven D'Aprano <steve@pearwood.info> wrote:
...
There's nothing stopping alternative implementations having their own

implementation-specific standard library modules.



steve@orac:/home/s$ jython

Jython 2.5.1+ (Release_2_5_1, Aug 4 2010, 07🔞19)

[OpenJDK Server VM (Sun Microsystems Inc.)] on java1.6.0_27

Type "help", "copyright", "credits" or "license" for more information.

>>> import java

>>>



Small nit: Jython does implement a number of implementation-specific modules in its version of the standard library; jarray comes to mind, which is mostly but not completely superseded by the standard array module.

However, the java package namespace is not part of the standard library, it's part of the standard Java ecosystem and it's due to a builtin import hook:

Jython 2.7b3+ (default:6cee6fef06f0, Jun 9 2014, 22:29:14)
\[Java HotSpot(TM) 64-Bit Server VM (Oracle Corporation)\] on java1.7.0\_60
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
\['', '/home/jbaker/jythondev/jython27/dist/Lib', '\_\_classpath\_\_', '\_\_pyclasspath\_\_/', '/home/jbaker/.local/lib/jython2.7/site-packages', '/home/jbaker/jythondev/jython27/dist/Lib/site-packages'\]

The entry \_\_classpath\_\_ means search CLASSPATH for Java packages; this includes the Java runtime, rt.jar, from which you get package namespaces as java.\*, javax.\*, sun.\*, etc.

Another behavior that you get for free in Jython is being able to also import the org.python.\* namespace, which is Jython's own runtime. Some of the implementations of standard library modules, such as threading, take advantage of this support.

- Jim