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Diffstat (limited to 'Doc/whatsnew/whatsnew24.tex')
| -rw-r--r-- | Doc/whatsnew/whatsnew24.tex | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/Doc/whatsnew/whatsnew24.tex b/Doc/whatsnew/whatsnew24.tex index 4947290..71389a3 100644 --- a/Doc/whatsnew/whatsnew24.tex +++ b/Doc/whatsnew/whatsnew24.tex @@ -109,8 +109,8 @@ iterators. If you want to reverse an iterator, first convert it to a list with \function{list()}. \begin{verbatim} ->>> data = open('/etc/passwd', 'r') ->>> for line in reversed(list(data)): +>>> input= open('/etc/passwd', 'r') +>>> for line in reversed(list(input)): ... print line ... root:*:0:0:System Administrator:/var/root:/bin/tcsh @@ -137,8 +137,7 @@ fill character other than a space. \item Strings also gained an \method{rsplit()} method that works like the \method{split()} method but splits from the end of -the string. Possible applications include splitting a filename -from a path or a domain name from URL. +the string. \begin{verbatim} >>> 'a b c'.split(None, 1) @@ -236,7 +235,7 @@ yellow 5 \item The \function{zip()} built-in function and \function{itertools.izip()} now return an empty list instead of raising a \exception{TypeError} - exception if called with no arguments. This makes the function more + exception if called with no arguments. This makes them more suitable for use with variable length argument lists: \begin{verbatim} @@ -354,9 +353,9 @@ default is 2. Note that \function{tee()} has to keep copies of the values returned by the iterator; in the worst case, it may need to keep all of them. -This should therefore be used carefully if there the leading iterator +This should therefore be used carefully if the leading iterator can run far ahead of the trailing iterator in a long stream of inputs. -If the separation is large, then it becomes preferrable to use +If the separation is large, then it becomes preferable to use \function{list()} instead. When the iterators track closely with one another, \function{tee()} is ideal. Possible applications include bookmarking, windowing, or lookahead iterators. @@ -385,8 +384,7 @@ For example: \item The \module{random} module has a new method called \method{getrandbits(N)} which returns an N-bit long integer. This method supports the existing \method{randrange()} method, making it possible to efficiently generate - arbitrarily large random numbers (suitable for prime number generation in - RSA applications for example). + arbitrarily large random numbers. \item The regular expression language accepted by the \module{re} module was extended with simple conditional expressions, written as |