Add some news for 2.1b2. I'd still like someone else to add news
about these packages: - distutils - xml
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Misc/NEWS
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Misc/NEWS
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What's New in Python 2.1 beta 2?
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================================
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(Unlisted are many fixed bugs, more documentation, etc.)
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Core language, builtins, and interpreter
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- The nested scopes work (enabled by "from __future__ import
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nested_scopes") is completed; in particular, the future now extends
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into code executed through exec, eval() and execfile(), and into the
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interactive interpreter.
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- When calling a base class method (e.g. BaseClass.__init__(self)),
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this is now allowed even if self is not strictly spoken a class
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instance (e.g. when using metaclasses or the Don Beaudry hook).
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- Slice objects are now comparable but not hashable; this prevents
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dict[:] from being accepted but meaningless.
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- Complex division is now calculated using less braindead algorithms.
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This doesn't change semantics except it's more likely to give useful
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results in extreme cases. Complex repr() now uses full precision
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like float repr().
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- sgmllib.py now calls handle_decl() for simple <!...> declarations.
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Standard library
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- A new module Tix was added, which wraps the Tix extension library for Tk.
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With that module, it is not necessary to statically link Tix with _tkinter,
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since Tix will be loaded with Tcl's "package require" command.
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- unittest.py, a unit testing framework by Steve Purcell (PyUNIT,
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inspired by JUnit), is now part of the standard library. You now
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have a choice of two testing frameworks: unittest requires you to
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write testcases as separate code, doctest gathers them from
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docstrings. Both approaches have their advantages and
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disadvantages.
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- A new module Tix was added, which wraps the Tix extension library
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for Tk. With that module, it is not necessary to statically link
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Tix with _tkinter, since Tix will be loaded with Tcl's "package
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require" command. See Demo/tix/.
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- tzparse.py is now obsolete.
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- In gzip.py, the seek() and tell() methods are removed -- they were
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non-functional anyway, and it's better if callers can test for their
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existence with hasattr().
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Python/C API
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- PyDict_Next(): it is now safe to call PyDict_SetItem() with a key
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that's already in the dictionary during a PyDict_Next() iteration.
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This used to fail occasionally when a dictionary resize operation
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could be triggered that would rehash all the keys. All other
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modifications to the dictionary are still off-limits during a
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PyDict_Next() iteration!
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- New extended APIs related to passing compiler variables around.
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- New abstract APIs PyObject_IsInstance(), PyObject_IsSubclass()
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implement isinstance() and issubclass().
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- Py_BuildValue() now has a "D" conversion to create a Python complex
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number from a Py_complex C value.
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What's New in Python 2.1 beta 1?
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================================
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