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| -rw-r--r-- | Doc/whatsnew/whatsnew24.tex | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/Doc/whatsnew/whatsnew24.tex b/Doc/whatsnew/whatsnew24.tex index f1fa374..d1b2c4c 100644 --- a/Doc/whatsnew/whatsnew24.tex +++ b/Doc/whatsnew/whatsnew24.tex @@ -941,6 +941,10 @@ the name \samp{None} is now a syntax error. the generated bytecode for list comprehensions and speeds them up by about a third. (Contributed by Raymond Hettinger.) +\item The peephole bytecode optimizer has been improved to +produce shorter, faster bytecode; remarkably the resulting bytecode is +more readable. (Enhanced by Raymond Hettinger.) + \item String concatenations in statements of the form \code{s = s + "abc"} and \code{s += "abc"} are now performed more efficiently in certain circumstances. This optimization won't be present in other @@ -1056,6 +1060,12 @@ any problems as a \member{defect} attribute of the message. find the N largest or smallest values in a dataset without the expense of a full sort. (Contributed by Raymond Hettinger.) +\item The \module{httplib} module now contains constants for HTTP +status codes defined in various HTTP-related RFC documents. Constants +have names such as \constant{OK}, \constant{CREATED}, +\constant{CONTINUE}, and \constant{MOVED_PERMANENTLY}; use pydoc to +get a full list. (Contributed by Andrew Eland.) + \item The \module{imaplib} module now supports IMAP's THREAD command (contributed by Yves Dionne) and new \method{deleteacl()} and \method{myrights()} methods (contributed by Arnaud Mazin). @@ -1167,6 +1177,11 @@ which rotated logs once the file exceeded a certain size. Both classes derive from a new \class{BaseRotatingHandler} class that can be used to implement other rotating handlers. +\item The \module{marshal} module now shares interned strings on unpacking a +data structure. This may shrink the size of certain pickle strings, +but the primary effect is to make \file{.pyc} files significantly smaller. +(Contributed by Martin von Loewis.) + \item The \module{nntplib} module's \class{NNTP} class gained \method{description()} and \method{descriptions()} methods to retrieve newsgroup descriptions for a single group or for a range of groups. @@ -1347,6 +1362,10 @@ Changes to Python's build process and to the C API include: implements fast dictionary lookups without masking exceptions raised during the look-up process. (Contributed by Raymond Hettinger.) + \item The \csimplemacro{Py_IS_NAN(\var{X})} macro returns 1 if + its float or double argument \var{X} is a NaN. + (Contributed by Tim Peters.) + \item A new function, \cfunction{PyArg_VaParseTupleAndKeywords()}, is the same as \cfunction{PyArg_ParseTupleAndKeywords()} but takes a \ctype{va_list} instead of a number of arguments. |