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Text File | 1995-12-17 | 6.0 KB | 154 lines | [TEXT/R*ch] |
- =====================================
- ==> Release 1.3 (13 October 1995) <==
- =====================================
-
- Major change
- ============
-
- Two words: Keyword Arguments. See the first section of Chapter 12 of
- the Tutorial.
-
- (The rest of this file is textually the same as the remaining sections
- of that chapter.)
-
-
- Changes to the WWW and Internet tools
- =====================================
-
- The "htmllib" module has been rewritten in an incompatible fashion.
- The new version is considerably more complete (HTML 2.0 except forms,
- but including all ISO-8859-1 entity definitions), and easy to use.
- Small changes to "sgmllib" have also been made, to better match the
- tokenization of HTML as recognized by other web tools.
-
- A new module "formatter" has been added, for use with the new
- "htmllib" module.
-
- The "urllib"and "httplib" modules have been changed somewhat to allow
- overriding unknown URL types and to support authentication. They now
- use "mimetools.Message" instead of "rfc822.Message" to parse headers.
- The "endrequest()" method has been removed from the HTTP class since
- it breaks the interaction with some servers.
-
- The "rfc822.Message" class has been changed to allow a flag to be
- passed in that says that the file is unseekable.
-
- The "ftplib" module has been fixed to be (hopefully) more robust on
- Linux.
-
- Several new operations that are optionally supported by servers have
- been added to "nntplib": "xover", "xgtitle", "xpath" and "date".
-
- Other Language Changes
- ======================
-
- The "raise" statement now takes an optional argument which specifies
- the traceback to be used when printing the exception's stack trace.
- This must be a traceback object, such as found in "sys.exc_traceback".
- When omitted or given as "None", the old behavior (to generate a stack
- trace entry for the current stack frame) is used.
-
- The tokenizer is now more tolerant of alien whitespace. Control-L in
- the leading whitespace of a line resets the column number to zero,
- while Control-R just before the end of the line is ignored.
-
- Changes to Built-in Operations
- ==============================
-
- For file objects, "f.read(0)" and "f.readline(0)" now return an empty
- string rather than reading an unlimited number of bytes. For the
- latter, omit the argument altogether or pass a negative value.
-
- A new system variable, "sys.platform", has been added. It specifies
- the current platform, e.g. "sunos5" or "linux1".
-
- The built-in functions "input()" and "raw_input()" now use the GNU
- readline library when it has been configured (formerly, only
- interactive input to the interpreter itself was read using GNU
- readline). The GNU readline library provides elaborate line editing
- and history. The Python debugger ("pdb") is the first beneficiary of
- this change.
-
- Two new built-in functions, "globals()" and "locals()", provide access
- to dictionaries containming current global and local variables,
- respectively. (These augment rather than replace "vars()", which
- returns the current local variables when called without an argument,
- and a module's global variables when called with an argument of type
- module.)
-
- The built-in function "compile()" now takes a third possible value for
- the kind of code to be compiled: specifying "'single'" generates code
- for a single interactive statement, which prints the output of
- expression statements that evaluate to something else than "None".
-
- Library Changes
- ===============
-
- There are new module "ni" and "ihooks" that support importing modules
- with hierarchical names such as "A.B.C". This is enabled by writing
- "import ni; ni.ni()" at the very top of the main program. These
- modules are amply documented in the Python source.
-
- The module "rexec" has been rewritten (incompatibly) to define a class
- and to use "ihooks".
-
- The "string.split()" and "string.splitfields()" functions are now the
- same function (the presence or absence of the second argument
- determines which operation is invoked); similar for "string.join()"
- and "string.joinfields()".
-
- The "Tkinter" module and its helper "Dialog" have been revamped to use
- keyword arguments. Tk 4.0 is now the standard. A new module
- "FileDialog" has been added which implements standard file selection
- dialogs.
-
- The optional built-in modules "dbm" and "gdbm" are more coordinated
- --- their "open()" functions now take the same values for their "flag"
- argument, and the "flag" and "mode" argument have default values (to
- open the database for reading only, and to create the database with
- mode "0666" minuse the umask, respectively). The memory leaks have
- finally been fixed.
-
- A new dbm-like module, "bsddb", has been added, which uses the BSD DB
- package's hash method.
-
- A portable (though slow) dbm-clone, implemented in Python, has been
- added for systems where none of the above is provided. It is aptly
- dubbed "dumbdbm".
-
- The module "anydbm" provides a unified interface to "bsddb", "gdbm",
- "dbm", and "dumbdbm", choosing the first one available.
-
- A new extension module, "binascii", provides a variety of operations
- for conversion of text-encoded binary data.
-
- There are three new or rewritten companion modules implemented in
- Python that can encode and decode the most common such formats: "uu"
- (uuencode), "base64" and "binhex".
-
- A module to handle the MIME encoding quoted-printable has also been
- added: "quopri".
-
- The parser module (which provides an interface to the Python parser's
- abstract syntax trees) has been rewritten (incompatibly) by Fred
- Drake. It now lets you change the parse tree and compile the result!
-
- The \code{syslog} module has been upgraded and documented.
-
- Other Changes
- =============
-
- The dynamic module loader recognizes the fact that different filenames
- point to the same shared library and loads the library only once, so
- you can have a single shared library that defines multiple modules.
- (SunOS / SVR4 style shared libraries only.)
-
- Jim Fulton's ``abstract object interface'' has been incorporated into
- the run-time API. For more detailes, read the files
- "Include/abstract.h" and "Objects/abstract.c".
-
- The Macintosh version is much more robust now.
-
- Numerous things I have forgotten or that are so obscure no-one will
- notice them anyway :-)
-