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  • Comparing Python to Other Languages

    ...objects a and b to find out their type, which is not known at compile time. It then invokes the appropriate addition operation, which may be an overloaded user-defined method. Java, on the other hand, can perform an efficient integer or floating point addition, but requires variable declarations for a and b, and does not allow overloading of the + operator for instances of user-defined classes. For these reasons, Python is much better suited as a "glue" language, while Java is better ch...

  • Unifying types and classes in Python 2.2

    ...object. The subclass __new__ can do two things to affect the resulting object: pass different arguments to the base class __new__, and modify the resulting object after it's been created (for example to initialize essential instance variables). __new__ must return an object. There's nothing that requires that it return a new object that is an instance of its class argument, although that is the convention. If you return an existing object, the constructor call will still call its __i...

  • Unifying types and classes in Python 2.2

    ...object. The subclass __new__ can do two things to affect the resulting object: pass different arguments to the base class __new__, and modify the resulting object after it's been created (for example to initialize essential instance variables). __new__ must return an object. There's nothing that requires that it return a new object that is an instance of its class argument, although that is the convention. If you return an existing object, the constructor call will still call its __i...

  • Unifying types and classes in Python 2.2

    ...object. The subclass __new__ can do two things to affect the resulting object: pass different arguments to the base class __new__, and modify the resulting object after it's been created (for example to initialize essential instance variables). __new__ must return an object. There's nothing that requires that it return a new object that is an instance of its class argument, although that is the convention. If you return an existing object, the constructor call will still call its __i...

  • Unifying types and classes in Python 2.2

    ...object. The subclass __new__ can do two things to affect the resulting object: pass different arguments to the base class __new__, and modify the resulting object after it's been created (for example to initialize essential instance variables). __new__ must return an object. There's nothing that requires that it return a new object that is an instance of its class argument, although that is the convention. If you return an existing object of your class or a subclass, the constructor ...

  • What's new in Python 1.5 and beyond

    ...object and type(x) is y. repr() and str() of class and instance objects now reflect the package/module in which the class is defined. Module "ni" has been removed. (If you really need it, it's been renamed to "ni1". Let me know if this causes any problems for you. Package authors are encouraged to write __init__.py files that support both ni and 1.5 package support, so the same version can be used with Python 1.4 as well as 1.5.) The thread module is now automatically inclu...

  • Release – Python 3.3.5rc1

    Version: None

    Released: Feb. 23, 2014

    Python 3.3.5 includes fixes for these important issues: a 3.3.4 regression in zipimport (see http://bugs.python.org/issue20621) a 3.3.4 regression executing scripts with a coding declared and Windows newlines (see http://bugs.python.org/issue20731) potential DOS using compression codecs in bytes.decode() (see http://bugs.python.org/issue19619 and http://bugs.python.org/issue20404) and also fixes quite a few other …

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  • Release – Python 3.3.5rc2

    Version: None

    Released: March 2, 2014

    Python 3.3.5 includes fixes for these important issues: a 3.3.4 regression in zipimport (see http://bugs.python.org/issue20621) a 3.3.4 regression executing scripts with a coding declared and Windows newlines (see http://bugs.python.org/issue20731) potential DOS using compression codecs in bytes.decode() (see http://bugs.python.org/issue19619 and http://bugs.python.org/issue20404) and also fixes quite a few other …

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  • Release – Python 3.3.5

    Version: None

    Released: March 9, 2014

    Python 3.3.5 includes fixes for these important issues: a 3.3.4 regression in zipimport (see http://bugs.python.org/issue20621) a 3.3.4 regression executing scripts with a coding declared and Windows newlines (see http://bugs.python.org/issue20731) potential DOS using compression codecs in bytes.decode() (see http://bugs.python.org/issue19619 and http://bugs.python.org/issue20404) and also fixes quite a few other …

    View Release Notes

  • Release – Python 3.3.5rc1

    Version: None

    Released: Feb. 23, 2014

    Python 3.3.5 includes fixes for these important issues: a 3.3.4 regression in zipimport (see http://bugs.python.org/issue20621) a 3.3.4 regression executing scripts with a coding declared and Windows newlines (see http://bugs.python.org/issue20731) potential DOS using compression codecs in bytes.decode() (see http://bugs.python.org/issue19619 and http://bugs.python.org/issue20404) and also fixes quite a few other …

  • Python 3.3.5 release

    ...object-oriented code PEP 362, the function-signature object The new "faulthandler" module that helps diagnosing crashes The new "unittest.mock" module The new "ipaddress" module The "sys.implementation" attribute A policy framework for the email package, with a provisional (see PEP 411) policy that adds much improved unicode support for email header parsing A "collections.ChainMap" class for linking mappings to a single unit Wrappers for many mor...

  • Notes

    ...objects, instead of strings. Objects which have Python equivalents are converted to Python objects, other objects are wrapped. This can be configured through the wantobjects method, or Tkinter.wantobjects. The PyBSDDB wrapper around the Sleepycat Berkeley DB library has been added as the package bsddb. The traditional bsddb module is still available in source code, but not built automatically anymore, and is now named bsddb185. This supports Berkeley DB versions from 3.0 to 4.1. For help con...

  • Foreword for "Programming Python" (2nd ed.)

    ...object than standard output. Personally, it's the Python 2.0 feature I use most frequently, but most people who opened their mouth about found it an abomination. The discussion thread on the newsgroup berating this simple language extension was one of the longest ever -- apart from the never-ending Python vs. Perl thread. Which brings me to the next topic. (No, not Python vs. Perl. There are better places to pick a fight than a foreword.) I mean the speed of Python's evolution, a ...

  • Python Success Stories

    ...object-oriented interpreted programming language, dubbed Bridge Scripting Language (BSL), as a substitute for the original sequencing language. I wanted to preserve and expand the ability to easily make changes to business logic without having to recompile code - a feature that is very useful when supporting a manufacturing environment. The original common business practice code of the system, as well as the specific business practice code for the first few TAPs, was written in BSL. It was durin...

  • Python 2.4.1 - Release Notes

    ...Object_GC_New or PyObject_GC_NewVar to allocate objects and PyObject_GC_Del to deallocate them rename PyObject_GC_Init to PyObject_GC_Track and PyObject_GC_Fini to PyObject_GC_UnTrack remove PyGC_HEAD_SIZE from object size calculations remove calls to PyObject_AS_GC and PyObject_FROM_GC Two new functions: PyString_FromFormat() and PyString_FromFormatV(). These can be used safely to construct string objects from a sprintf-style format string (similar to the format string supported by PyErr_For...

  • What's new in Python 2.3

    ...objects. Also new in 2.3b1, support for inet_pton() and inet_ntop(). ssl - the Windows installer now incorporates SSL support. (New in 2.3a2: timeouts set on the underlying socket are now handled correctly.) Tkinter - now returns Tcl objects instead of strings. Support for Tcl/Tk 8.0 and 8.1 is dropped; support for threaded Tcl/Tk is added, as is support for various Tk 8.4 features. The Windows installer now ships with Tcl/Tk 8.4.3. In 2.3b1, variable wrappers now also pass objects directly...

  • Python Success Stories

    ...object-oriented basis for building my Node class, and pygame provided the primitives for displaying images, creating cursors, and collecting input. One of the biggest challenges was deciding among ways to organize the description of the world. On the one hand, I could have created a descriptive language for the structure of the world, and written an interpreter to read the description and build the in-memory structures on which the game would run. This would have been a fairly large effort, and ...

  • Notes

    ...objects, the ljust(), center(), and rjust() methods now accept an optional argument specifying a fill character other than a space. When method objects have an attribute that can be satisfied either by the function object or by the method object, the function object's attribute usually wins. Christian Tismer pointed out that that this is really a mistake, because this only happens for special methods (like __reduce__) where the method object's version is really more appropriate than the functio...

  • Python Success Stories

    ...objects, presented for debugging, and reasoned about to assess data validity, to name a few. We needed a way to describe this schema once and then reliably produce executable code from it. The Hard Way with C++ Our first implementation of this schema involved a fractured collection of representations. The XML protocol module had tables describing the serialization and deserialization of XML streams. The storage modules had other tables describing the mapping from disk to memory structures. T...

  • Computer Programming for Everybody

    ...objectionable. (Not all of the table is disputed, but it seems wiser not to engage in direct language comparisons without a lot more documentation.) Innovative Claims In the seventies, Xerox PARC asked itself: "Can we have a computer on every desk?" By the middle of the nineties, this question was answered affirmatively. But all those computers haven't necessarily empowered their users. Today's computers are often inflexible: the average computer user can often only change a lim...

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