diff options
| -rw-r--r-- | Doc/lib/libfuncs.tex | 2 | ||||
| -rw-r--r-- | Doc/lib/libsets.tex | 7 | ||||
| -rw-r--r-- | Doc/tut/tut.tex | 6 | ||||
| -rw-r--r-- | Doc/whatsnew/whatsnew24.tex | 21 |
4 files changed, 24 insertions, 12 deletions
diff --git a/Doc/lib/libfuncs.tex b/Doc/lib/libfuncs.tex index 5aa0c18..61880ae 100644 --- a/Doc/lib/libfuncs.tex +++ b/Doc/lib/libfuncs.tex @@ -1063,7 +1063,7 @@ It's a function \versionchanged[Formerly, \function{zip()} required at least one argument and \code{zip()} raised a \exception{TypeError} instead of returning - \code{[]}]{2.4} + an empty list.]{2.4} \end{funcdesc} diff --git a/Doc/lib/libsets.tex b/Doc/lib/libsets.tex index 5f98967..6d49b16 100644 --- a/Doc/lib/libsets.tex +++ b/Doc/lib/libsets.tex @@ -91,7 +91,7 @@ the following operations: {new set with a shallow copy of \var{s}} \end{tableiii} -Note, this non-operator versions of \method{union()}, +Note, the non-operator versions of \method{union()}, \method{intersection()}, \method{difference()}, and \method{symmetric_difference()} will accept any iterable as an argument. In contrast, their operator based counterparts require their arguments to @@ -158,10 +158,7 @@ but not found in \class{ImmutableSet}: {remove all elements from set \var{s}} \end{tableiii} -\versionchanged[Earlier versions had an \method{update()} method; use - \method{union_update()} instead]{2.3.1} - -Note, this non-operator versions of \method{union_update()}, +Note, the non-operator versions of \method{union_update()}, \method{intersection_update()}, \method{difference_update()}, and \method{symmetric_difference_update()} will accept any iterable as an argument. diff --git a/Doc/tut/tut.tex b/Doc/tut/tut.tex index ce941f3..56dd395 100644 --- a/Doc/tut/tut.tex +++ b/Doc/tut/tut.tex @@ -2161,11 +2161,11 @@ pattern, list comprehensions can compactly specify the key-value list. \section{Looping Techniques \label{loopidioms}} When looping through dictionaries, the key and corresponding value can -be retrieved at the same time using the \method{items()} method. +be retrieved at the same time using the \method{iteritems()} method. \begin{verbatim} >>> knights = {'gallahad': 'the pure', 'robin': 'the brave'} ->>> for k, v in knights.items(): +>>> for k, v in knights.iteritems(): ... print k, v ... gallahad the pure @@ -3957,7 +3957,7 @@ list, and the function object is called with this new argument list. \section{Random Remarks \label{remarks}} -[These should perhaps be placed more carefully...] +% [These should perhaps be placed more carefully...] Data attributes override method attributes with the same name; to diff --git a/Doc/whatsnew/whatsnew24.tex b/Doc/whatsnew/whatsnew24.tex index 0f5e546..2e573b5 100644 --- a/Doc/whatsnew/whatsnew24.tex +++ b/Doc/whatsnew/whatsnew24.tex @@ -12,7 +12,7 @@ \tableofcontents This article explains the new features in Python 2.4. No release date -for Python 2.4 has been set; expect that this will happen in 2004. +for Python 2.4 has been set; expect that this will happen mid-2004. While Python 2.3 was primarily a library development release, Python 2.4 may extend the core language and interpreter in @@ -42,6 +42,7 @@ False set(['a', 'r', 'b', 'c', 'd']) >>> ''.join(a) # convert back into a string 'arbcd' + >>> b = set('alacazam') # form a second set >>> a - b # letters in a but not in b set(['r', 'd', 'b']) @@ -51,6 +52,7 @@ set(['a', 'c', 'r', 'd', 'b', 'm', 'z', 'l']) set(['a', 'c']) >>> a ^ b # letters in a or b but not both set(['r', 'd', 'b', 'm', 'z', 'l']) + >>> a.add('z') # add a new element >>> a.update('wxy') # add multiple new elements >>> a @@ -115,6 +117,11 @@ Here are all of the changes that Python 2.4 makes to the core Python language. \begin{itemize} + +\item The string methods, \method{ljust()}, \method{rjust()}, and +\method{center()} now take a optional argument for specifying a +fill character other than a space. + \item The \method{sort()} method of lists gained three keyword arguments, \var{cmp}, \var{key}, and \var{reverse}. These arguments make some common usages of \method{sort()} simpler. All are optional. @@ -185,10 +192,12 @@ use in expressions. The differences are: [11, 12, 13, 14, 15, 16, 17, 18, 19] >>> L = [9,7,8,3,2,4,1,6,5] # original is left unchanged [9,7,8,3,2,4,1,6,5] + >>> list.sorted('Monte Python') # any iterable may be an input [' ', 'M', 'P', 'e', 'h', 'n', 'n', 'o', 'o', 't', 't', 'y'] + +>>> # List the contents of a dict sorted by key values >>> colormap = dict(red=1, blue=2, green=3, black=4, yellow=5) ->>> # Lists the contents of the dict sorted by key values >>> for k, v in list.sorted(colormap.iteritems()): ... print k, v ... @@ -202,7 +211,7 @@ yellow 5 \item The \function{zip()} built-in function and \function{itertools.izip()} - now return an empty list instead of raising a \exception{TypeError} + now returns an empty list instead of raising a \exception{TypeError} exception if called with no arguments. This makes the functions more suitable for use with variable length argument lists: @@ -297,6 +306,12 @@ Changes to Python's build process and to the C API include: objN)}, constructs tuples from a variable length argument list of Python objects. + \item A new function, \function{PyDict_Contains(d, k)}, implements + fast dictionary lookups without masking exceptions raised during + the loop-up process (compare with \function{PySequence_Contains()} + which is slower or \function{PyMapping_HasKey()} which clears all + exceptions). + \end{itemize} |