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author | Benjamin Peterson <benjamin@python.org> | 2008-07-31 16:23:04 (GMT) |
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committer | Benjamin Peterson <benjamin@python.org> | 2008-07-31 16:23:04 (GMT) |
commit | d63137159b0e0cdbaec5d4cb98b3de5940173ee3 (patch) | |
tree | af0338eee39149f2fd7cdff45a71aaa7ba79eaf5 /Doc | |
parent | 76b09ca89a1e712a7b3732e3640df54bb29eff35 (diff) | |
download | cpython-d63137159b0e0cdbaec5d4cb98b3de5940173ee3.zip cpython-d63137159b0e0cdbaec5d4cb98b3de5940173ee3.tar.gz cpython-d63137159b0e0cdbaec5d4cb98b3de5940173ee3.tar.bz2 |
Merged revisions 65209-65216,65225-65226,65233,65239,65246-65247,65255-65256 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r65209 | raymond.hettinger | 2008-07-23 19:08:18 -0500 (Wed, 23 Jul 2008) | 1 line
Finish-up the partial conversion from int to Py_ssize_t for deque indices and length.
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r65210 | raymond.hettinger | 2008-07-23 19:53:49 -0500 (Wed, 23 Jul 2008) | 1 line
Parse to the correct datatype.
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r65211 | benjamin.peterson | 2008-07-23 21:27:46 -0500 (Wed, 23 Jul 2008) | 1 line
fix spacing
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r65212 | benjamin.peterson | 2008-07-23 21:31:28 -0500 (Wed, 23 Jul 2008) | 1 line
fix markup
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r65213 | benjamin.peterson | 2008-07-23 21:45:37 -0500 (Wed, 23 Jul 2008) | 1 line
add some documentation for 2to3
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r65214 | raymond.hettinger | 2008-07-24 00:38:48 -0500 (Thu, 24 Jul 2008) | 1 line
Finish conversion from int to Py_ssize_t.
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r65215 | raymond.hettinger | 2008-07-24 02:04:55 -0500 (Thu, 24 Jul 2008) | 1 line
Convert from long to Py_ssize_t.
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r65216 | georg.brandl | 2008-07-24 02:09:21 -0500 (Thu, 24 Jul 2008) | 2 lines
Fix indentation.
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r65225 | benjamin.peterson | 2008-07-25 11:55:37 -0500 (Fri, 25 Jul 2008) | 1 line
teach .bzrignore about doc tools
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r65226 | benjamin.peterson | 2008-07-25 12:02:11 -0500 (Fri, 25 Jul 2008) | 1 line
document default value for fillvalue
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r65233 | raymond.hettinger | 2008-07-25 13:43:33 -0500 (Fri, 25 Jul 2008) | 1 line
Issue 1592: Better error reporting for operations on closed shelves.
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r65239 | benjamin.peterson | 2008-07-25 16:59:53 -0500 (Fri, 25 Jul 2008) | 1 line
fix indentation
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r65246 | andrew.kuchling | 2008-07-26 08:08:19 -0500 (Sat, 26 Jul 2008) | 1 line
This sentence continues to bug me; rewrite it for the second time
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r65247 | andrew.kuchling | 2008-07-26 08:09:06 -0500 (Sat, 26 Jul 2008) | 1 line
Remove extra words
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r65255 | skip.montanaro | 2008-07-26 19:49:02 -0500 (Sat, 26 Jul 2008) | 3 lines
Close issue 3437 - missing state change when Allow lines are processed.
Adds test cases which use Allow: as well.
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r65256 | skip.montanaro | 2008-07-26 19:50:41 -0500 (Sat, 26 Jul 2008) | 2 lines
note robotparser bug fix.
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Diffstat (limited to 'Doc')
-rw-r--r-- | Doc/glossary.rst | 9 | ||||
-rw-r--r-- | Doc/library/2to3.rst | 75 | ||||
-rw-r--r-- | Doc/library/development.rst | 4 | ||||
-rw-r--r-- | Doc/library/email.message.rst | 2 | ||||
-rw-r--r-- | Doc/library/itertools.rst | 7 | ||||
-rw-r--r-- | Doc/whatsnew/2.6.rst | 2 |
6 files changed, 93 insertions, 6 deletions
diff --git a/Doc/glossary.rst b/Doc/glossary.rst index ab11a83..41bf081 100644 --- a/Doc/glossary.rst +++ b/Doc/glossary.rst @@ -16,6 +16,15 @@ Glossary The typical Python prompt of the interactive shell when entering code for an indented code block. + 2to3 + A tool that tries to convert Python 2.x code to Python 3.x code by + handling most of the incompatibilites that can be detected by parsing the + source and traversing the parse tree. + + 2to3 is available in the standard library as :mod:`lib2to3`; a standalone + entry point is provided as :file:`Tools/scripts/2to3`. See + :ref:`2to3-reference`. + abstract base class Abstract Base Classes (abbreviated ABCs) complement :term:`duck-typing` by providing a way to define interfaces when other techniques like :func:`hasattr` diff --git a/Doc/library/2to3.rst b/Doc/library/2to3.rst new file mode 100644 index 0000000..4d64af8 --- /dev/null +++ b/Doc/library/2to3.rst @@ -0,0 +1,75 @@ +.. _2to3-reference: + +2to3 - Automated Python 2 to 3 code translation +=============================================== + +.. sectionauthor:: Benjamin Peterson + +2to3 is a Python program that reads your Python 2.x source code and applies a +series of *fixers* to transform it into valid Python 3.x code. + + +Using 2to3 +---------- + +2to3 can be run with a list of files to transform or a directory to recursively +traverse looking for files with the ``.py`` extension. + +Here is a sample Python 2.x source file, :file:`example.py`:: + + def greet(name): + print "Hello, {0}!".format(name) + print "What's your name?" + name = raw_input() + greet(name) + +It can be converted to Python 3.x code via 2to3 on the command line:: + + $ 2to3 example.py + +A diff against the original source file will be printed. 2to3 can also write +the needed modifications right back to the source file. (A backup of the +original file will also be made.) This is done with the :option:`-w` flag:: + + $ 2to3 -w example.py + +:file:`example.py` will now look like this:: + + def greet(name): + print("Hello, {0}!".format(name)) + print("What's your name?") + name = input() + greet(name) + +Comments and and exact indentation will be preserved throughout the translation +process. + +By default, 2to3 will run a set of predefined fixers. The :option:`-l` flag +lists all avaible fixers. An explicit set of fixers to run can be given by use +of the :option:`-f` flag. The following example runs only the ``imports`` and +``has_key`` fixers:: + + $ 2to3 -f imports -f has_key example.py + +Some fixers are *explicit*, meaning they aren't run be default and must be +listed on the command line. Here, in addition to the default fixers, the +``idioms`` fixer is run:: + + $ 2to3 -f all -f idioms example.py + +Notice how ``all`` enables all default fixers. + +Sometimes 2to3 will find will find a place in your source code that needs to be +changed, but 2to3 cannot fix automatically. In this case, 2to3 will print a +warning beneath the diff for a file. + + +:mod:`lib2to3` - 2to3's library +------------------------------- + +.. module:: lib2to3 + :synopsis: the 2to3 library +.. moduleauthor:: Guido van Rossum +.. moduleauthor:: Collin Winter + +.. XXX What is the public interface anyway? diff --git a/Doc/library/development.rst b/Doc/library/development.rst index be8c33d..8cd3d0c 100644 --- a/Doc/library/development.rst +++ b/Doc/library/development.rst @@ -9,7 +9,8 @@ The modules described in this chapter help you write software. For example, the :mod:`pydoc` module takes a module and generates documentation based on the module's contents. The :mod:`doctest` and :mod:`unittest` modules contains frameworks for writing unit tests that automatically exercise code and verify -that the expected output is produced. +that the expected output is produced. :program:`2to3` can translate Python 2.x +source code into valid Python 3.x code. The list of modules described in this chapter is: @@ -19,4 +20,5 @@ The list of modules described in this chapter is: pydoc.rst doctest.rst unittest.rst + 2to3.rst test.rst diff --git a/Doc/library/email.message.rst b/Doc/library/email.message.rst index f51230c..bb9c7c7 100644 --- a/Doc/library/email.message.rst +++ b/Doc/library/email.message.rst @@ -90,7 +90,7 @@ Here are the methods of the :class:`Message` class: .. method:: get_payload([i[, decode]]) - Return a reference the current payload, which will be a list of + Return the current payload, which will be a list of :class:`Message` objects when :meth:`is_multipart` is ``True``, or a string when :meth:`is_multipart` is ``False``. If the payload is a list and you mutate the list object, you modify the message's payload in place. diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst index 3320d99..2d7e756 100644 --- a/Doc/library/itertools.rst +++ b/Doc/library/itertools.rst @@ -295,9 +295,10 @@ loops that truncate the stream. except IndexError: pass - If one of the iterables is potentially infinite, then the :func:`zip_longest` - function should be wrapped with something that limits the number of calls (for - example :func:`islice` or :func:`takewhile`). + If one of the iterables is potentially infinite, then the + :func:`izip_longest` function should be wrapped with something that limits + the number of calls (for example :func:`islice` or :func:`takewhile`). If + not specified, *fillvalue* defaults to ``None``. .. function:: permutations(iterable[, r]) diff --git a/Doc/whatsnew/2.6.rst b/Doc/whatsnew/2.6.rst index 203091f..a8d89cb 100644 --- a/Doc/whatsnew/2.6.rst +++ b/Doc/whatsnew/2.6.rst @@ -1144,7 +1144,7 @@ The :meth:`register` method is useful when you've written a new ABC that can describe an existing type or class, or if you want to declare that some third-party class implements an ABC. For example, if you defined a :class:`PrintableType` ABC, -it's legal to do: +it's legal to do:: # Register Python's types PrintableType.register(int) |