diff options
Diffstat (limited to 'Doc/whatsnew/3.2.rst')
| -rw-r--r-- | Doc/whatsnew/3.2.rst | 47 |
1 files changed, 20 insertions, 27 deletions
diff --git a/Doc/whatsnew/3.2.rst b/Doc/whatsnew/3.2.rst index 2f42424..f101b90 100644 --- a/Doc/whatsnew/3.2.rst +++ b/Doc/whatsnew/3.2.rst @@ -88,7 +88,7 @@ overcome the limitations of :mod:`optparse` which did not provide support for positional arguments (not just options), subcommands, required options and other common patterns of specifying and validating options. -This module already has widespread success in the community as a +This module has already had widespread success in the community as a third-party module. Being more fully featured than its predecessor, the :mod:`argparse` module is now the preferred module for command-line processing. The older module is still being kept available because of the substantial amount @@ -100,18 +100,18 @@ or more positional arguments is present, and making a required option:: import argparse parser = argparse.ArgumentParser( - description='Manage servers', # main description for help - epilog='Tested on Solaris and Linux') # displayed after help + description = 'Manage servers', # main description for help + epilog = 'Tested on Solaris and Linux') # displayed after help parser.add_argument('action', # argument name - choices=['deploy', 'start', 'stop'], # three allowed values - help='action on each target') # help msg + choices = ['deploy', 'start', 'stop'], # three allowed values + help = 'action on each target') # help msg parser.add_argument('targets', - metavar='HOSTNAME', # var name used in help msg - nargs='+', # require one or more targets - help='url for target machines') # help msg explanation + metavar = 'HOSTNAME', # var name used in help msg + nargs = '+', # require one or more targets + help = 'url for target machines') # help msg explanation parser.add_argument('-u', '--user', # -u or --user option - required=True, # make it a required argument - help='login as user') + required = True, # make it a required argument + help = 'login as user') Example of calling the parser on a command string:: @@ -329,7 +329,7 @@ aspects that are visible to the programmer: * The :mod:`py_compile` and :mod:`compileall` modules have been updated to reflect the new naming convention and target directory. The command-line invocation of *compileall* has new command-line options: ``-i`` for - specifying a list of files and directories to compile, and ``-b`` which causes + specifying a list of files and directories to compile and ``-b`` which causes bytecode files to be written to their legacy location rather than *__pycache__*. @@ -391,7 +391,7 @@ the bodies of requests and responses. The *native strings* are always of type :class:`str` but are restricted to code points between *U+0000* through *U+00FF* which are translatable to bytes using *Latin-1* encoding. These strings are used for the keys and values in the -``environ`` dictionary and for response headers and statuses in the +environment dictionary and for response headers and statuses in the :func:`start_response` function. They must follow :rfc:`2616` with respect to encoding. That is, they must either be *ISO-8859-1* characters or use :rfc:`2047` MIME encoding. @@ -1414,7 +1414,7 @@ ast --- The :mod:`ast` module has a wonderful a general-purpose tool for safely -evaluating strings containing Python expressions using the Python literal +evaluating expression strings using the Python literal syntax. The :func:`ast.literal_eval` function serves as a secure alternative to the builtin :func:`eval` function which is easily abused. Python 3.2 adds :class:`bytes` and :class:`set` literals to the list of supported types: @@ -1881,8 +1881,7 @@ object. The former returns a string and the latter prints it:: dbm --- -All database modules now support :meth:`get` and :meth:`setdefault` are now -available in all database modules +All database modules now support the :meth:`get` and :meth:`setdefault` methods. (Suggested by Ray Allen in :issue:`9523`.) @@ -2094,14 +2093,8 @@ reading directly from dictionaries and strings. (All changes contributed by Łukasz Langa.) -difflib -------- - -:class:`difflib.SequenceMatcher` has a new parameter in its constructor, -*autojunk*, that allows the user to turn off the automatic junk heuristic the -class uses in its algorithm. Additionally, two new attributes were exposed -to users - *bjunk* and *bpopular*, allowing better understanding of the -heuristics used by the class. +.. XXX show a difflib example +.. XXX add entry for logging changes other than the dict config pep urllib.parse ------------ @@ -2460,13 +2453,13 @@ Changes to Python's build process and to the C API include: function declaration, which was kept for backwards compatibility reasons, is now removed -- the macro was introduced in 1997 (:issue:`8276`). -* The is a new function :c:func:`PyLong_AsLongLongAndOverflow` which +* There is a new function :c:func:`PyLong_AsLongLongAndOverflow` which is analogous to :c:func:`PyLong_AsLongAndOverflow`. They both serve to convert Python :class:`int` into a native fixed-width type while providing detection of cases where the conversion won't fit (:issue:`7767`). -* The :c:func:`PyUnicode_CompareWithASCIIString` now returns *not equal* - if the Python string is *NUL* terminated. +* The :c:func:`PyUnicode_CompareWithASCIIString` function now returns *not + equal* if the Python string is *NUL* terminated. * There is a new function :c:func:`PyErr_NewExceptionWithDoc` that is like :c:func:`PyErr_NewException` but allows a docstring to be specified. @@ -2621,6 +2614,6 @@ require changes to your code: and :c:func:`PyEval_RestoreThread()`) should be used instead. * Due to security risks, :func:`asyncore.handle_accept` has been deprecated, and - a new function, :func:`asyncore.handle_accepted` was added to replace it. + a new function, :func:`asyncore.handle_accepted`, was added to replace it. (Contributed by Giampaolo Rodola in :issue:`6706`.) |