Mailman 3 December 2010 - Python-announce-list

ANN: PyGUI 2.3.3
by Greg Ewing 18 Dec '10

18 Dec '10

PyGUI 2.3.3 is available: http://www.cosc.canterbury.ac.nz/greg.ewing/python_gui/ Minor update to fix a problem with the previous release on some versions of MacOSX. What is PyGUI? -------------- PyGUI is a cross-platform GUI toolkit designed to be lightweight and have a highly Pythonic API. -- Gregory Ewing greg.ewing(a)canterbury.ac.nz http://www.cosc.canterbury.ac.nz/greg.ewing/

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PySide: Python for Qt version 1.0.0~beta2 "Mineshaft gap" released
by Matti Airas 17 Dec '10

17 Dec '10

The PySide team is happy to announce the second beta release of PySide: Python for Qt. New versions of some of the PySide toolchain components (API Extractor and Shiboken) have been released as well. This is a source code release only; we hope our community packagers will be providing provide binary packages shortly. To acquire the source code packages, refer to our download wiki page [1] or pull the relevant tagged versions from our git repositories [2]. Major changes since 1.0.0~beta1 =============================== PySide now supports exposing list-like properties to QML using QDeclarativeListProperty. Documentation is still rather sparse, but refer to the example to see a how it works [3]. Other than the QML work, we have been working on fixing outstanding bugs. Since beta1, a total of 16 high-priority bugs have been fixed. See the list of fixed bugs at the end of this message. Note for Windows users ====================== While preparing the release, we noticed at the last minute a regression that only occurs on Windows (bug 554) [4]. Due to insufficient time for fixing the bug, we decided to move forward with the release nevertheless. We will provide a separate patch for fixing the Windows regression within the next few days. Path towards 1.0 release ======================== There are still plenty of outstanding bugs in our Bugzilla [5]. To improve our quality in a controlled fashion, we plan to do probably a couple more beta releases after the current one. Due to the holiday season, the next release will be three weeks from now, but after that we'll return to two-week release cadence until 1.0. About PySide ============ PySide is the Nokia-sponsored Python Qt bindings project, providing access to not only the complete Qt 4.7 framework but also Qt Mobility, as well as to generator tools for rapidly generating bindings for any Qt-based libraries. The PySide project is developed in the open, with all facilities you'd expect from any modern OSS project such as all code in a git repository [2], an open Bugzilla [5] for reporting bugs, and an open design process [6]. We welcome any contribution without requring a transfer of copyright. List of bugs fixed ================== 383 qelapsedtimer_wrapper.cpp: No such file or directory 415 phonon bindings does not build 468 Segfaults, segfaults and more segfaults 489 PySide.QtGui.QImage with string buffer argument 491 pyside doesn't respect BUILD_TESTS 500 If an instance of QPrintDialog is created a deadlock happens on shutdown. 505 CppObject was destroyed before __del__ be called 508 qmltopy1 crashes when setContextProperty is called twice without keeping a reference 512 QGridLayout::getItemPosition() is not available 513 Hardcoded bool return type for operator overloads 517 Documentation for QtDeclarative is not linked in contents.html, modules.html 518 The file "genindex.html" is not found (linked from contents.html) 524 Debugging errors during work of createpackage.js on windows is hard 527 Two different PySide Wikis 542 New style signals/slots + curried functions: unexpected argument during call 543 Regression: Signals with default values broken References ========== [1] http://developer.qt.nokia.com/wiki/PySideDownloads [2] http://qt.gitorious.org/pyside [3] http://qt.gitorious.org/pyside/pyside-examples/trees/master/examples/declar… [4] http://bugs.openbossa.org/show_bug.cgi?id=554 [5] http://bugs.openbossa.org/ [6] http://www.pyside.org/docs/pseps/psep-0001.html <P><A HREF="http://www.pyside.org">PySide: Python for Qt 1.0.0~beta2</A> - PySide provides complete LGPL-licensed Python Qt bindings, including the generator toolchain. (17-Dec-10)

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Luminescence v. 0.3 released
by Pedro Matiello 17 Dec '10

17 Dec '10

Luminescence release 0.3 http://code.google.com/p/luminescence/ ------------------------------------------------------------------------ Luminescence is an application for generating HTML presentations from Markdown sources. It allows one to create simple presentations quickly. An small example of what it can do is here: http://dl.dropbox.com/u/1823095/luminescence/tutorial.html New in this release: support for UTF-8 files and fade-in/out effects. Installing: easy_install luminescence

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ANN: Shed Skin 0.7
by Mark Dufour 16 Dec '10

16 Dec '10

Hi all, I have just released Shed Skin 0.7, an optimizing (restricted-)Python-to-C++ compiler. It comes with lots of minor fixes and some optimizations, a new Windows package (which includes GCC 4.5), and two nice new examples, for a total of 52 examples at around 14,000 lines (sloccount). Please see my blog for the full announcement: http://shed-skin.blogspot.com Or go straight to the homepage: http://shedskin.googlecode.com Please have a look at the tutorial, try it out, and report issues at the homepage. Thanks, Mark Dufour -- http://www.youtube.com/watch?v=E6LsfnBmdnk

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ANN: PyGUI 2.3.2
by Greg Ewing 16 Dec '10

16 Dec '10

PyGUI 2.3.2 is available: http://www.cosc.canterbury.ac.nz/greg.ewing/python_gui/ This version fixes a problem in Cocoa whereby the coordinate system for drawing in a Pixmap was upside down, and corrects a slight mistake in the Canvas documentation. What is PyGUI? -------------- PyGUI is a cross-platform GUI toolkit designed to be lightweight and have a highly Pythonic API. -- Gregory Ewing greg.ewing(a)canterbury.ac.nz http://www.cosc.canterbury.ac.nz/greg.ewing/

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[ANN] guiqwt v2.0.8
by Pierre.RAYBAUT＠CEA.FR 15 Dec '10

15 Dec '10

Hi all, I am pleased to announce that `guiqwt` v2.0.8 has been released. Note that the project has recently been moved to GoogleCode: http://guiqwt.googlecode.com This version of `guiqwt` includes a brand new documentation with examples, API reference, etc.: http://packages.python.org/guiqwt/ Based on PyQwt (plotting widgets for PyQt4 graphical user interfaces) and on the scientific modules NumPy and SciPy, guiqwt is a Python library providing efficient 2D data-plotting features (curve/image visualization and related tools) for interactive computing and signal/image processing application development. When compared to the excellent module `matplotlib`, the main advantage of `guiqwt` is performance: see http://packages.python.org/guiqwt/overview.html#performances. But `guiqwt` is more than a plotting library; it also provides: * Helper functions for data processing: see the example http://packages.python.org/guiqwt/examples.html#curve-fitting * Framework for signal/image processing application development: see http://packages.python.org/guiqwt/examples.html * And many other features like making executable Windows programs easily (py2exe helpers): see http://packages.python.org/guiqwt/disthelpers.html guiqwt plotting features are the following: guiqwt.pyplot: equivalent to matplotlib's pyplot module (pylab) supported plot items: * curves, error bar curves and 1-D histograms * images (RGB images are not supported), images with non-linear x/y scales, images with specified pixel size (e.g. loaded from DICOM files), 2-D histograms, pseudo-color images (pcolor) * labels, curve plot legends * shapes: polygon, polylines, rectangle, circle, ellipse and segment * annotated shapes (shapes with labels showing position and dimensions): rectangle with center position and size, circle with center position and diameter, ellipse with center position and diameters (these items are very useful to measure things directly on displayed images) curves, images and shapes: * multiple object selection for moving objects or editing their properties through automatically generated dialog boxes (guidata) * item list panel: move objects from foreground to background, show/hide objects, remove objects, ... * customizable aspect ratio * a lot of ready-to-use tools: plot canvas export to image file, image snapshot, image rectangular filter, etc. curves: * interval selection tools with labels showing results of computing on selected area * curve fitting tool with automatic fit, manual fit with sliders, ... images: * contrast adjustment panel: select the LUT by moving a range selection object on the image levels histogram, eliminate outliers, ... * X-axis and Y-axis cross-sections: support for multiple images, average cross-section tool on a rectangular area, ... * apply any affine transform to displayed images in real-time (rotation, magnification, translation, horizontal/vertical flip, ...) application development helpers: * ready-to-use curve and image plot widgets and dialog boxes * load/save graphical objects (curves, images, shapes) * a lot of test scripts which demonstrate guiqwt features guiqwt has been successfully tested on GNU/Linux and Windows platforms. Python package index page: http://pypi.python.org/pypi/guiqwt/ Documentation, screenshots: http://packages.python.org/guiqwt/ Downloads (source + Python(x,y) plugin): http://guiqwt.googlecode.com Cheers, Pierre --- Dr. Pierre Raybaut CEA - Commissariat à l'Energie Atomique et aux Energies Alternatives

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[ANN] guidata v1.2.5
by Pierre.RAYBAUT＠CEA.FR 15 Dec '10

15 Dec '10

Hi all, I am pleased to announce that `guidata` v1.2.5 has been released. Note that the project has recently been moved to GoogleCode: http://guidata.googlecode.com This version of `guidata` includes a brand new documentation with examples, API reference, etc.: http://packages.python.org/guidata/ Based on the Qt Python binding module PyQt4, guidata is a Python library generating graphical user interfaces for easy dataset editing and display. It also provides helpers and application development tools for PyQt4. guidata also provides the following features: * guidata.qthelpers: PyQt4 helpers * guidata.disthelpers: py2exe helpers * guidata.userconfig: .ini configuration management helpers (based on Python standard module ConfigParser) * guidata.configtools: library/application data management * guidata.gettext_helpers: translation helpers (based on the GNU tool gettext) * guidata.guitest: automatic GUI-based test launcher * guidata.utils: miscelleneous utilities guidata has been successfully tested on GNU/Linux and Windows platforms. Python package index page: http://pypi.python.org/pypi/guidata/ Documentation, screenshots: http://packages.python.org/guidata/ Downloads (source + Python(x,y) plugin): http://guidata.googlecode.com Cheers, Pierre --- Dr. Pierre Raybaut CEA - Commissariat à l'Energie Atomique et aux Energies Alternatives

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New OpenOpt/FuncDesigner release 0.32
by dmitrey 15 Dec '10

15 Dec '10

Hi all, I'm glad to inform you about new quarterly OpenOpt/FuncDesigner release (0.32): OpenOpt: * New class: LCP (and related solver) * New QP solver: qlcp * New NLP solver: sqlcp * New large-scale NSP (nonsmooth) solver gsubg. Currently it still requires lots of improvements (especially for constraints - their handling is very premature yet and often fails), but since the solver sometimes already works better than ipopt, algencan and other competitors it was tried with, I decided to include the one into the release. * Now SOCP can handle Ax <= b constraints (and bugfix for handling lb <= x <= ub has been committed) * Some other fixes and improvements FuncDesigner: * Add new function removeAttachedConstraints * Add new oofuns min and max (their capabilities are quite restricted yet) * Systems of nonlinear equations: possibility to assign personal tolerance for an equation * Some fixes and improvements For more details see our forum entry http://forum.openopt.org/viewtopic.php?id=325 Regards, D.

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Luminescence v. 0.2 released
by Pedro Matiello 14 Dec '10

14 Dec '10

Luminescence release 0.2 http://code.google.com/p/luminescence/ ------------------------------------------------------------------------ Luminescence is an application for generating HTML presentations from Markdown sources. It allows one to create simple presentations quickly. An small example of what it can do is here: http://dl.dropbox.com/u/1823095/luminescence/tutorial.html Installing: easy_install luminescence

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ANN: Cython 0.14 released
by Robert Bradshaw 14 Dec '10

14 Dec '10

The Cython project is happy to announce the release of Cython 0.14. This release fixes several bugs in the previous 0.13 release, improved debugging and build support, and heavily improves Python compatibility in terms of supported features. It can be downloaded from http://cython.org/ or http://pypi.python.org/pypi/Cython/0.14 Release notes: http://wiki.cython.org/ReleaseNotes-0.14 == New Features == * Python classes can now be nested and receive a proper closure at definition time. * Redefinition is supported for Python functions, even within the same scope. * Lambda expressions are supported in class bodies and at the module level. * Metaclasses are supported for Python classes, both in Python 2 and Python 3 syntax. The Python 3 syntax (using a keyword argument in the type declaration) is preferred and optimised at compile time. * "final" extension classes prevent inheritance in Python space. This feature is available through the new "cython.final" decorator. In the future, these classes may receive further optimisations. * "internal" extension classes do not show up in the module dictionary. This feature is available through the new "cython.internal" decorator. * Extension type inheritance from builtin types, such as "cdef class MyUnicode(unicode)", now works without further external type redeclarations (which are also strongly discouraged now and continue to issue a warning). * GDB support. http://docs.cython.org/src/userguide/debugging.html * A new build system with support for inline distutils directives, correct dependency tracking, and parallel compilation. http://wiki.cython.org/enhancements/distutils_preprocessing * Support for dynamic compilation at runtime via the new cython.inline function and cython.compile decorator. http://wiki.cython.org/enhancements/inline == General improvements and bug fixes == * In parallel assignments, the right side was evaluated in reverse order in 0.13. This could result in errors if it had side effects (e.g. function calls). * In some cases, methods of builtin types would raise a SystemError instead of an AttributeError when called on None. * Constant tuples are now cached over the lifetime of an extension module, just like CPython does. Constant argument tuples of Python function calls are also cached. * Closures have tightened to include exactly the names used in the inner functions and classes. Previously, they held the complete locals of the defining function. * "nogil" blocks are supported when compiling pure Python code by writing "with cython.nogil". * The builtin "next()" function in Python 2.6 and later is now implemented internally and therefore available in all Python versions. This makes it the preferred and portable way of manually advancing an iterator. * In addition to the previously supported inlined generator expressions in 0.13, "sorted(genexpr)" can now be used as well. Typing issues were fixed in "sum(genexpr)" that could lead to invalid C code being generated. Other known issues with inlined generator expressions were also fixed that make upgrading to 0.14 a strong recommendation for code that uses them. Note that general generators and generator expressions continue to be not supported. * Iterating over arbitrary pointer types is now supported, as is an optimized version of the in operator, e.g. x in ptr[a:b]. * Inplace arithmetic operators now respect the cdivision directive and are supported for complex types. == Incompatible changes == * Typing a variable as type "complex" previously gave it the Python object type. It now uses the appropriate C/C++ {{{double complex}}} type. A side-effect is that assignments and typed function parameters now accept anything that Python can coerce to a complex, including integers and floats, and not only complex instances. * Large integer literals pass through the compiler in a safer way. To prevent truncation in C code, non 32-bit literals are turned into Python objects if not used in a C context. This context can either be given by a clear C literal suffix such as "UL" or "LL" (or "L" in Python 3 code), or it can be an assignment to a typed variable or a typed function argument, in which case it is up to the user to take care of a sufficiently large value space of the target. * Python functions are declared in the order they appear in the file, rather than all being created at module creation time. This is consistent with Python and needed to support, for example, conditional or repeated declarations of functions. In the face of circular imports this may cause code to break, so a new {{{--disable-function-redefinition}}} flag was added to revert to the old behavior. This flag will be removed in a future release, so should only be used as a stopgap until old code can be fixed. == Contributors == Many people contributed to this release, including: * Haoyu Bai * Stefan Behnel * Robert Bradshaw * Ondrej Certik * Lisandro Dalcin * Mark Florisson * Eric Huss * Vitja Makarov * Corbin Simpson * Kurt Smith

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