mirror of https://github.com/python/cpython
153 lines
4.3 KiB
TeX
153 lines
4.3 KiB
TeX
\documentclass{howto}
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\usepackage{distutils}
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% $Id$
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\title{What's New in Python 2.5}
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\release{0.0}
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\author{A.M. Kuchling}
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\authoraddress{\email{amk@amk.ca}}
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\begin{document}
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\maketitle
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\tableofcontents
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This article explains the new features in Python 2.5. No release date
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for Python 2.5 has been set; it will probably be released in late 2005.
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% Compare with previous release in 2 - 3 sentences here.
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This article doesn't attempt to provide a complete specification of
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the new features, but instead provides a convenient overview. For
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full details, you should refer to the documentation for Python 2.5.
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% add hyperlink when the documentation becomes available online.
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If you want to understand the complete implementation and design
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rationale, refer to the PEP for a particular new feature.
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%======================================================================
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% Large, PEP-level features and changes should be described here.
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%======================================================================
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\section{Other Language Changes}
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Here are all of the changes that Python 2.5 makes to the core Python
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language.
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\begin{itemize}
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\item The \function{min()} and \function{max()} built-in functions
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gained a \code{key} keyword argument analogous to the \code{key}
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argument for \function{sort()}. This argument supplies a function
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that takes a single argument and is called for every value in the list;
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\function{min()}/\function{max()} will return the element with the
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smallest/largest return value from this function.
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For example, to find the longest string in a list, you can do:
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\begin{verbatim}
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L = ['medium', 'longest', 'short']
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# Prints 'longest'
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print max(L, key=len)
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# Prints 'short', because lexicographically 'short' has the largest value
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print max(L)
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\end{verbatim}
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(Contributed by Steven Bethard and Raymond Hettinger.)
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\end{itemize}
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%======================================================================
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\subsection{Optimizations}
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\begin{itemize}
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\item Optimizations should be described here.
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\end{itemize}
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The net result of the 2.5 optimizations is that Python 2.5 runs the
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pystone benchmark around XX\% faster than Python 2.4.
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%======================================================================
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\section{New, Improved, and Deprecated Modules}
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As usual, Python's standard library received a number of enhancements and
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bug fixes. Here's a partial list of the most notable changes, sorted
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alphabetically by module name. Consult the
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\file{Misc/NEWS} file in the source tree for a more
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complete list of changes, or look through the CVS logs for all the
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details.
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\begin{itemize}
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\item Descriptions go here.
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\end{itemize}
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%======================================================================
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% whole new modules get described in \subsections here
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% ======================================================================
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\section{Build and C API Changes}
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Changes to Python's build process and to the C API include:
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\begin{itemize}
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\item The \cfunction{PyRange_New()} function was removed. It was never documented,
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never used in the core code, and had dangerously lax error checking.
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\end{itemize}
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%======================================================================
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\subsection{Port-Specific Changes}
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Platform-specific changes go here.
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%======================================================================
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\section{Other Changes and Fixes \label{section-other}}
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As usual, there were a bunch of other improvements and bugfixes
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scattered throughout the source tree. A search through the CVS change
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logs finds there were XXX patches applied and YYY bugs fixed between
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Python 2.4 and 2.5. Both figures are likely to be underestimates.
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Some of the more notable changes are:
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\begin{itemize}
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\item Details go here.
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\end{itemize}
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%======================================================================
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\section{Porting to Python 2.5}
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This section lists previously described changes that may require
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changes to your code:
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\begin{itemize}
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\item Everything is all in the details!
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\end{itemize}
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%======================================================================
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\section{Acknowledgements \label{acks}}
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The author would like to thank the following people for offering
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suggestions, corrections and assistance with various drafts of this
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article: .
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\end{document}
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