Differences between revisions 3 and 15 (spanning 12 versions)
Revision 3 as of 2007-09-23 21:02:53
Size: 1405
Editor: PhilipJenvey
Comment: updates
Revision 15 as of 2008-02-17 21:21:15
Size: 4793
Editor: PhilipJenvey
Comment: small updates
Deletions are marked like this. Additions are marked like this.
Line 1: Line 1:
The things/steps needed to get Pylons running on Jython: #format rst
Line 3: Line 3:
* The ability to install Pylons and all its dependencies: Pylons (0.9.6.1) on Jython Requirements/TODO
============================================
Line 5: Line 6:
  - distutils and setuptools (See SetuptoolsOnJython) Installing Pylons and its dependencies
--------------------------------------
Line 7: Line 9:
Ensure all dependencies' tests pass:   * distutils and setuptools **(Mostly finished, See** `SetuptoolsOnJython`_ **)**
Line 9: Line 11:
* Paste, PasteDeploy and PasteScript   * Ensure all dependencies' tests pass
Line 11: Line 13:
* Mako nose
----
Line 13: Line 16:
* Beaker Pylons projects require nose, but most packages (including Pylons) use nose as their own test runners.
Line 15: Line 18:
* nose
  - nose requires the optparse (easy) and compiler modules (sort of easy -- compiler requires the parser module, which won't be easy to get on Jython). nose only needs the compiler module to use compiler.consts.CO_GENERATOR; maybe jython could provide a broken compiler module that doesn't import parser.
requires:
Line 18: Line 20:
* Routes   * optparse module **(added in r4018)**
Line 20: Line 22:
  - (I actually got all of routes' tests to pass on Jython well over a year ago -pjenvey)   * a fix for the cell variable (variables used in closures) bug here: http://pylonshq.com/pasties/667 **(fixed in r4038)**
Line 22: Line 24:
* WebHelpers   * fix for new.instancemethod not allowing a PyType as its class argument **(fixed in r4051)**
Line 24: Line 26:
* FormEncode   * fix for inspect.argspec not working (also needed for Pylons, among other things) **(fixed in r4053)**
Line 26: Line 28:
* simplejson   * imp.find_module returned entries in regard to bytecode files instead of .py files when they were available **(fixed in r4080)**
Line 28: Line 30:
* decorator   * fix type names and class __module__ in doctests **(fixed in r4107, 4111)**
Line 30: Line 32:
  - Note: decorators aren't currently supported in Jython, however the decorator module doesn't actually use decorators (works on CPython 2.3)   * methods weren't always inheriting their inner functions' __name__ and __doc__ **(fixed in r4109)**
Line 32: Line 34:
Later down the road:   * compiler package (and compiler requires the parser module which Jython lacks). nose only needs the compiler module to use compiler.consts.CO_GENERATOR; until there's a parser jython will provide a broken compiler module that doesn't import parser **(added in r4114)**
Line 34: Line 36:
* SQLAlchemy. The [http://www.sqlalchemy.org/trac/ticket/672 Dialect Refactor II] ticket will need to be implemented to properly support using SQLAlchemy via Jython's DBAPI jdbc driver, [http://jython.org/Project/userguide.html#database-connectivity-in-jython zxJDBC]. Frank Wierzbicki has done some preliminary work on using SQLAlchemy with Jython, info [http://groups.google.com/group/sqlalchemy/browse_frm/thread/d60db24fe1683a41/09320033f406d78b?hl=en&lnk=gst here] Routes
------
All tests, except some which require paste.fixture (Paste is troublesome to import at this point), pass


Paste, PasteDeploy and PasteScript
----------------------------------
requires:

  * modulefinder module (imported in paste/__init__.py). Jython currently lacks it, and modulefinder relies on reading code objects via marshal.load

  * subprocess module: if it doesn't exist (Python 2.3) it uses a version copied over from CPython 2.4 (paste.util.subprocess24). paste.util.subprocess24 dies on attempting to import fcntl, so Jython needs to provide subprocess

  * webbrowser module: paste.fixture imports it. Jython doesn't include it. It's a pretty simple module -- though it doesn't seem to work right on Jython when launching a console browser (like lynx or links). I think it's an os.system problem

  * exposes a bug in strings to ints.

  Offending code is:

  int("00c04fd430c8", 16)
  
  Exception:

  File "/Users/pjenvey/src/java/jython-trunk/dist/Lib/site-packages/PasteScript-1.6.2dev_r7203-py2.3.egg/paste/script/util/uuid.py", line 49, in __init__

  ValueError: invalid literal for __int__: 00c04fd430c8

Mako
----
requires:

  * compiler module: to parse Python code into AST. The compiler module is mostly pure Python code, but its guts are really the native parser module (which Jython lacks)

Beaker
------
requires:

  * Paste (for paste.fixture)
  * base64.b64encode: might die on an attempting to import b64encode in beaker.crypto.PBKDF2 (at least it does when the tests are run)

WebHelpers
----------
requires:

  * routes
  * simplejson

FormEncode
----------
requires:

  * gettext (which requires the locale module, which Jython lacks) **(both were added in r4077, 4084)**

simplejson
----------

  * `SetuptoolsOnJython`_ (actually distutils) currently has trouble installing simplejson, because it attempts to compile its optional C extensions (that help performance). It expects to catch a distutils.errors.CCompilerError if the compilation fails, but Jython dies much earlier:

  File "/Users/pjenvey/src/java/jython-trunk/dist/Lib/distutils/command/build_ext.py", line 598, in get_ext_filename

  TypeError: cannot concatenate 'str' and 'NoneType' objects

decorator
---------

  * Note: decorators aren't currently supported in Jython, however the decorator module doesn't actually use decorators (works on CPython 2.3)
  * requires function.func_defaults to be writable and it currently isn't on Jython

Later down the road
===================

SQLAlchemy
----------

  * The `Dialect Refactor II <http://www.sqlalchemy.org/trac/ticket/672>`_ ticket will need to be implemented to properly support using SQLAlchemy via Jython's DBAPI jdbc driver, `zxJDBC <http://jython.org/Project/userguide.html#database-connectivity-in-jython>`_.
  
  * Frank Wierzbicki has done some preliminary work on using SQLAlchemy with Jython, info `here <http://groups.google.com/group/sqlalchemy/browse_frm/thread/d60db24fe1683a41/09320033f406d78b?hl=en&lnk=gst>`_, and is scheduled to give a talk at PyCon 2008: "Database development with Jython, SQLAlchemy, and Hibernate"

Turbogears 2
------------

  * Jim Baker has already started playing with Genshi on the `Jython modern branch <http://fisheye3.cenqua.com/browse/jython/branches/modern>`_

Pylons (0.9.6.1) on Jython Requirements/TODO

Installing Pylons and its dependencies

  • distutils and setuptools (Mostly finished, See SetuptoolsOnJython )
  • Ensure all dependencies' tests pass

nose

Pylons projects require nose, but most packages (including Pylons) use nose as their own test runners.

requires:

  • optparse module (added in r4018)
  • a fix for the cell variable (variables used in closures) bug here: http://pylonshq.com/pasties/667 (fixed in r4038)
  • fix for new.instancemethod not allowing a PyType as its class argument (fixed in r4051)
  • fix for inspect.argspec not working (also needed for Pylons, among other things) (fixed in r4053)
  • imp.find_module returned entries in regard to bytecode files instead of .py files when they were available (fixed in r4080)
  • fix type names and class __module__ in doctests (fixed in r4107, 4111)
  • methods weren't always inheriting their inner functions' __name__ and __doc__ (fixed in r4109)
  • compiler package (and compiler requires the parser module which Jython lacks). nose only needs the compiler module to use compiler.consts.CO_GENERATOR; until there's a parser jython will provide a broken compiler module that doesn't import parser (added in r4114)

Routes

All tests, except some which require paste.fixture (Paste is troublesome to import at this point), pass

Paste, PasteDeploy and PasteScript

requires:

  • modulefinder module (imported in paste/__init__.py). Jython currently lacks it, and modulefinder relies on reading code objects via marshal.load
  • subprocess module: if it doesn't exist (Python 2.3) it uses a version copied over from CPython 2.4 (paste.util.subprocess24). paste.util.subprocess24 dies on attempting to import fcntl, so Jython needs to provide subprocess
  • webbrowser module: paste.fixture imports it. Jython doesn't include it. It's a pretty simple module -- though it doesn't seem to work right on Jython when launching a console browser (like lynx or links). I think it's an os.system problem
  • exposes a bug in strings to ints.

Offending code is:

int("00c04fd430c8", 16)

Exception:

File "/Users/pjenvey/src/java/jython-trunk/dist/Lib/site-packages/PasteScript-1.6.2dev_r7203-py2.3.egg/paste/script/util/uuid.py", line 49, in __init__

ValueError: invalid literal for __int__: 00c04fd430c8

Mako

requires:

  • compiler module: to parse Python code into AST. The compiler module is mostly pure Python code, but its guts are really the native parser module (which Jython lacks)

Beaker

requires:

  • Paste (for paste.fixture)
  • base64.b64encode: might die on an attempting to import b64encode in beaker.crypto.PBKDF2 (at least it does when the tests are run)

WebHelpers

requires:

  • routes
  • simplejson

FormEncode

requires:

  • gettext (which requires the locale module, which Jython lacks) (both were added in r4077, 4084)

simplejson

  • SetuptoolsOnJython (actually distutils) currently has trouble installing simplejson, because it attempts to compile its optional C extensions (that help performance). It expects to catch a distutils.errors.CCompilerError if the compilation fails, but Jython dies much earlier:

File "/Users/pjenvey/src/java/jython-trunk/dist/Lib/distutils/command/build_ext.py", line 598, in get_ext_filename

TypeError: cannot concatenate 'str' and 'NoneType' objects

decorator

  • Note: decorators aren't currently supported in Jython, however the decorator module doesn't actually use decorators (works on CPython 2.3)
  • requires function.func_defaults to be writable and it currently isn't on Jython

Later down the road

SQLAlchemy

  • The Dialect Refactor II ticket will need to be implemented to properly support using SQLAlchemy via Jython's DBAPI jdbc driver, zxJDBC.
  • Frank Wierzbicki has done some preliminary work on using SQLAlchemy with Jython, info here, and is scheduled to give a talk at PyCon 2008: "Database development with Jython, SQLAlchemy, and Hibernate"

Turbogears 2

PylonsOnJython (last edited 2009-09-14 22:04:24 by PhilipJenvey)