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  • Metaclasses in Python 1.5

    ...callable.'' (Types are not classes, by the way. See questions 4.2, 4.19 and in particular 6.22 in the Python FAQ for more on this topic.) The base class is B; this one's easy. Since B is a class, its type is ``class''; so the type of the base class is the type ``class''. This is also known as types.ClassType, assuming the standard module types has been imported. Now is the type ``class'' callable? No, because types (in core Python) are never callable. Classes are ca...

  • Glue It All Together With Python

    ...callable from Java it is callable from JPython.)

  • Python Success Stories

    ...callable from Python code. The GUI components of the CD/DVD partitioner were built using Tkinter, which provides a simple but very reliable GUI development toolkit. cx_Freeze was used to package up the Python control software into an executable. At the hardware level, a JUKI-740E (K6 400MHz CPU and 64M RAM) CPU card is used for the main computer. The OS is Linux kernel 2.4.18 and the system software includes BusyBox, minimized X11 window server, touch panel daemon, and network driver. All of the...

  • Python Success Stories

    ...callable from IronPython. There is still a lot of work to do before this project will be useful, but obviously such a technology would be of interest to all users of IronPython. Enough progress has been made thus far to demonstrate the feasibility of the approach: The bzip C extension module can currently be called from IronPython, and others will follow as we implement more of the Python C extension API. Negative Perceptions of Open-Source Sometimes we need to remind ourselves that people out...

  • Python Humor

    ...callable is sent in as either lo, hi or stride, that > callable is called with either (lo,hi,stride), (hi,lo,stride) or > (stride,lo,hi) depending on which position in the index is > currently in use. It's up to the callee to figure out which it > is. > > The real question is how metaclasses can help here... [Andrew Kuchling] > Why make things so complicated? Just define a markup language > for specifying which items to remove. Then you'd only need a > single list....

  • What's New In Python 3.0

    ...callable" instead of the expected dbm.error. Bug #3884: Make the turtle module toplevel again. Issue #3547: Fixed ctypes structures bitfields of varying integer sizes. Extension Modules Issue #3659: Subclasses of str didn't work as SQL parameters. Build Issue #4120: Exclude manifest from extension modules in VS2008. Issue #4091: Install pythonxy.dll in system32 again. Issue #4018: Disable "for me" installations on Vista. Issue #4204: Fixed module build errors on FreeBSD 4....

  • Notes

    ...callable types. The types classobj (formerly class), code, function, instance, and instancemethod (formerly instance-method), which have no built-in names but are accessible through the types module, are now also callable. The type dict-proxy is renamed to dictproxy. Cycles going through the __class__ link of a new-style instance are now detected by the garbage collector. Classes using __slots__ are now properly garbage collected. [SF bug 519621] Tightened the __slots__ rules: a slot name must...

  • Notes

    ...callable used when new message classes must be instantiated by the next() method. random.py is now self-contained, and offers all the functionality of the now-deprecated whrandom.py. See the docs for details. random.py also supports new functions getstate() and setstate(), for saving and restoring the internal state of the generator; and jumpahead(n), for quickly forcing the internal state to be the same as if n calls to random() had been made. The latter is particularly useful for multi- thr...

  • Python 2.4.1 - Release Notes

    ...callable types. The types classobj (formerly class), code, function, instance, and instancemethod (formerly instance-method), which have no built-in names but are accessible through the types module, are now also callable. The type dict-proxy is renamed to dictproxy. Cycles going through the __class__ link of a new-style instance are now detected by the garbage collector. Classes using __slots__ are now properly garbage collected. [SF bug 519621] Tightened the __slots__ rules: a slot name must...

  • Unifying types and classes in Python 2.2

    ...callable. This was called the Don Beaudry hook - may it rest in peace.) Otherwise, if there's a global variable named __metaclass__, it is used. Otherwise, the classic metaclass (types.ClassType) is used. The most common outcomes here are that M is either types.ClassType (creating a classic class), or 'type' (creating a new-style class). Other common outcomes are a custom extension type (like Jim Fulton's ExtensionClass), or a subtype of 'type' (when we're using new-style met...

  • Unifying types and classes in Python 2.2

    ...callable. This was called the Don Beaudry hook - may it rest in peace.) Otherwise, if there's a global variable named __metaclass__, it is used. Otherwise, the classic metaclass (types.ClassType) is used. The most common outcomes here are that M is either types.ClassType (creating a classic class), or 'type' (creating a new-style class). Other common outcomes are a custom extension type (like Jim Fulton's ExtensionClass), or a subtype of 'type' (when we're using new-style met...

  • Unifying types and classes in Python 2.2

    ...callable. This was called the Don Beaudry hook - may it rest in peace.) Otherwise, if there's a global variable named __metaclass__, it is used. Otherwise, the classic metaclass (types.ClassType) is used. The most common outcomes here are that M is either types.ClassType (creating a classic class), or 'type' (creating a new-style class). Other common outcomes are a custom extension type (like Jim Fulton's ExtensionClass), or a subtype of 'type' (when we're using new-style met...

  • Unifying types and classes in Python 2.2

    ...callable. This was called the Don Beaudry hook - may it rest in peace.) Otherwise, if there's a global variable named __metaclass__, it is used. Otherwise, the classic metaclass (types.ClassType) is used. The most common outcomes here are that M is either types.ClassType (creating a classic class), or 'type' (creating a new-style class). Other common outcomes are a custom extension type (like Jim Fulton's ExtensionClass), or a subtype of 'type' (when we're using new-style met...

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