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author | Andrew M. Kuchling <amk@amk.ca> | 2004-08-31 11:26:23 (GMT) |
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committer | Andrew M. Kuchling <amk@amk.ca> | 2004-08-31 11:26:23 (GMT) |
commit | 3294e9d2e73b19a28a450ca7a7f47ece30272a46 (patch) | |
tree | 70582fffb0bdbc941a7001b1d900b0f80ae1ebf9 /Doc/whatsnew | |
parent | 17952b78e10818fb567c1163a67017c0e313c78b (diff) | |
download | cpython-3294e9d2e73b19a28a450ca7a7f47ece30272a46.zip cpython-3294e9d2e73b19a28a450ca7a7f47ece30272a46.tar.gz cpython-3294e9d2e73b19a28a450ca7a7f47ece30272a46.tar.bz2 |
Update versions and dates; add PEP 328
Diffstat (limited to 'Doc/whatsnew')
-rw-r--r-- | Doc/whatsnew/whatsnew24.tex | 46 |
1 files changed, 41 insertions, 5 deletions
diff --git a/Doc/whatsnew/whatsnew24.tex b/Doc/whatsnew/whatsnew24.tex index 9649d5b..a383f6d 100644 --- a/Doc/whatsnew/whatsnew24.tex +++ b/Doc/whatsnew/whatsnew24.tex @@ -21,15 +21,15 @@ \maketitle \tableofcontents -This article explains the new features in Python 2.4 alpha2, scheduled -for release in late July 2004. The final version of Python 2.4 is -expected to be released around September 2004. +This article explains the new features in Python 2.4 alpha3, scheduled +for release in early September. The final version of Python 2.4 is +expected to be released around December 2004. Python 2.4 is a medium-sized release. It doesn't introduce as many changes as the radical Python 2.2, but introduces more features than the conservative 2.3 release did. The most significant new language -feature (as of this writing) is the addition of generator expressions; -most other changes are to the standard library. +features (as of this writing) are function decorators and generator +expressions; most other changes are to the standard library. This article doesn't attempt to provide a complete specification of every single new feature, but instead provides a convenient overview. @@ -659,6 +659,42 @@ Rexx language.} %====================================================================== +\section{PEP 328: Multi-line Imports} + +One language change is a small syntactic tweak aimed at making it +easier to import many names from a module. In a +\code{from \var{module} import \var{names}} statement, +\var{names} is a sequence of names separated by commas. If the sequence is +very long, you can either write multiple imports from the same module, +or you can use backslashes to escape the line endings: + +\begin{verbatim} +from SimpleXMLRPCServer import SimpleXMLRPCServer,\ + SimpleXMLRPCRequestHandler,\ + CGIXMLRPCRequestHandler,\ + resolve_dotted_attribute +\end{verbatim} + +The syntactic change simply allows putting the names within +parentheses. Python ignores newlines within a parenthesized +expression, so the backslashes are no longer needed: + +\begin{verbatim} +from SimpleXMLRPCServer import (SimpleXMLRPCServer, + SimpleXMLRPCRequestHandler, + CGIXMLRPCRequestHandler, + resolve_dotted_attribute) +\end{verbatim} + +The PEP also proposes that all \keyword{import} statements be +absolute imports, with a leading \samp{.} character to indicate a +relative import. This part of the PEP is not yet implemented. + +\begin{seealso} +\seepep{328}{Imports: Multi-Line and Absolute/Relative}{Written by Aahz. Multi-line imports were implemented by Dima Dorfman.} + + +%====================================================================== \section{PEP 331: Locale-Independent Float/String Conversions} The \module{locale} modules lets Python software select various |