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partial list of changes between 2.0b1 and 2.0b2
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‎Misc/NEWS‎

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What's New in Python 2.0b1?
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What's New in Python 2.0b2?
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===========================
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Below is a list of all relevant changes since release 1.6. Older
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======================================================================
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What's new in 2.0 beta 2 (since beta 1)?
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========================================
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Core language, builtins, and interpreter
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- Add support for unbounded ints in %d,i,y,x,X,o formats for string
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inter
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- Add -h and -V flags to print the usage message and Python version
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number and exit immediately.polation.
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Standard library and extensions
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- array: reverse method of array now works. buffer_info now does
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argument checking; it still takes no arguments.
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- asyncore/asynchat: included most recent version from Sam Rushing
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- cgi: accept & or ; as separate characters when parsing form data
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- CGIHTTPServer: now works on Windows (and perhaps even Mac).
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- ConfigParser: When reading the file, options spelled in upper case
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letters are now accessible.
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- copy: Copy Unicode objects atomically.
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- cPickle: fails gracefully when copy_reg can't be imported
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- cStringIO: implemented readlines method.
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- dbm: Add set and setdefault methods to dbm object. Add constant
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library to module that names the library used. Better doc strings
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and argument checking. Uses configure to determine which ndbm.h
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file to include; Berkeley DB's nbdm is now an option.
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- distutils: Update to version 0.9.3.
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- dl: Add several dl.RTLD_ constants.
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- fpectl: Now supported on FreeBSD.
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- gc: Add DEBUG_SAVEALL option. When enabled all garbage objects
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found by the collector will be saved in gc.garbage. This is useful
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for debugging a program that creates reference cycles.
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- httplib: Three changes. Restore support for set_debuglevel feature
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of HTTP class. Do not close socket on zero-length response. Do not
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crash when server sends invalid content-length header.
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- mailbox: XXX conformance to maildir specification ???
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- operator: Add contains, invert, __invert__ as aliases for
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__contains__, inv, and __inv__ respectively.
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- os: Add support for popen2 and popen3 on all platforms where fork
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exists.
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- os: (Windows only) Add startfile function athat exposes part of
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Win32 ShellExecute functionality.
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- os.path: (NT, DOS) Treat trailing colon correctly in os.path.join.
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os.path.join("a:", "b") yields "a:b".
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- pickle: Now raises ValueError when an invalid pickle that contains
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a non-string repr where a string repr was expected. This behavior
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matches cPickle.
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- posixfile: XXX remove __del__ method ???
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- py_compile: support \r in source file
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- readline: Does not immediately exit when ^C is hit when readline and
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threads are configured. Adds defintion of rl_library_version.
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- rfc822: Domain literals returned by AddrlistClass method
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getdomainliteral are now properly wrapped in brackets.
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- site: sys.setdefaultencoding() should only be called in case the
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standard default encoding ("ascii") is changed. This safes quite a
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few cycles during startup since the first call to
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setdefaultencoding() will initialize the codec registry and the
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encodings package.
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- socket: Support for size hint in readlines method of object returned
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by makefile.
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- sre: Added experimental expand method to match objects. Does not
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user buffer interface on Unicode strings. Does not hang if group id
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is followed by whitespace.
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- StringIO: size hint in readlines is now supported as documented.
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- struct: Check ranges for bytes and shorts.
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- urllib: Improved handling of win32 proxy settings. Fixed quote and
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quote_plus functions so that the always encode a comma ','.
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- Tkinter: Image objects are now guaranteed to have unique ids. Set
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event.delta to zero if Tk version doesn't support mousewheel.
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Removed some debugging prints.
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- UserList: now implements __contains__.
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- webbrower: On Windows, use os.startfile instead of os.popen, which
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works around a bug in certain versions of Norton AntiVirus that
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leads directly to a Blue Screen.
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- xml: New version detection code allows PyXML to override standard
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XML package if PyXML version is greater than 0.6.1.
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- xml.dom: XXX
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- xml.sax: XXX
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- XXX pyexpat: XXX
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C API
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- Add three new convenience functions for module initialization --
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PyModule_AddObject(), PyModule_AddIntConstant(), and
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PyModule_AddStringConstant().
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- Cleaned up definition of NULL in C source code; all defintions were
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removed and add #error to Python.h if NULL isn't defined after
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#include of stdio.h.
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- Py_PROTO macros that were removed in 2.0b1 have been restored for
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backwards compatibility (at the source level) with old extensions.
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- XXX PyOS_sighandler_t, PyOS_getsig, PyOS_setsig
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- Add PyString_AsStringAndSize call that provides access to the
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internal data buffer and size of a string object -- or the default
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encoded version of a Unicode object.
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Internals
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- On Unix, fix code for finding Python installation directory so that
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it works when argv[0] is a relative path.
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- Added a true unicode_internal_encode function and fixed the
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unicode_internal_decode function to support Unicode objects directly
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rather than by generating a copy of the object.
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- XXX Unicode database compression
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Build and platform-specific issues
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- Better support of GNU Pth via --with-pth configure option.
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- Fix linker problems on Reliant UNIX
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- Changes for the benefit of SunOS 4.1.4 (really!). mmapmodule.c:
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Don't define MS_SYNC to be zero when it is undefined. Added missing
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prototypes in posixmodule.c.
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- Improved support for HP-UX build
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What's new in 2.0 beta 1?
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=========================
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Source Incompatibilities
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------------------------
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