It creates a modified copy of an object by calling the object's
__replace__() method.
It is a generalization of dataclasses.replace(), named tuple's _replace()
method and replace() methods in various classes, and supports all these
stdlib classes.
copy.copy() and copy.deepcopy() now always raise a TypeError if
__reduce__() returns a tuple with length 6 instead of silently ignore
the 6th item or produce incorrect result.
Previously, the result could have been an instance of a subclass of int.
Also revert bpo-26202 and make attributes start, stop and step of the range
object having exact type int.
Add private function _PyNumber_Index() which preserves the old behavior
of PyNumber_Index() for performance to use it in the conversion functions
like PyLong_AsLong().
Copying property objects results in a TypeError. Steps to reproduce:
```
>>> import copy
>>> obj = property()
>>> copy.copy(obj)
````
This affects both shallow and deep copying.
My idea for a fix is to add property objects to the list of "atomic" objects in the copy module.
These already include types like functions and type objects.
I also added property objects to the unit tests test_copy_atomic and test_deepcopy_atomic. This is my first PR, and it's highly likely I've made some mistake, so please be kind :)
https://bugs.python.org/issue38293
* When doing getattr lookups with a default of "None", it now
uses an "is" comparison against None which is more correct
* Removed outdated code
Patch by Brandon Rhodes.
Merged revisions 63357 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
........
r63357 | alexandre.vassalotti | 2008-05-16 02:58:49 -0400 (Fri, 16 May 2008) | 2 lines
Changed references to the reprlib module to use its new name.
........
Updated documentation.
Merged revisions 63042 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
........
r63042 | alexandre.vassalotti | 2008-05-11 04:25:28 -0400 (Sun, 11 May 2008) | 5 lines
Added module stub for copy_reg renaming in 3.0.
Renamed copy_reg to copyreg in the standard library, to avoid
spurious warnings and ease later merging to py3k branch. Public
documentation remains intact.
........
svn+ssh://pythondev@svn.python.org/python/trunk
........
r61834 | raymond.hettinger | 2008-03-24 07:07:49 +0100 (Mon, 24 Mar 2008) | 1 line
Tighten documentation for Random.triangular.
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r61841 | raymond.hettinger | 2008-03-24 09:17:39 +0100 (Mon, 24 Mar 2008) | 1 line
Issue 2460: Make Ellipsis objects copyable.
........
r61842 | georg.brandl | 2008-03-24 10:34:34 +0100 (Mon, 24 Mar 2008) | 2 lines
#1700821: add a note to audioop docs about signedness of sample formats.
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r61851 | christian.heimes | 2008-03-24 20:57:42 +0100 (Mon, 24 Mar 2008) | 1 line
Added quick hack for bzr
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r61852 | christian.heimes | 2008-03-24 20:58:17 +0100 (Mon, 24 Mar 2008) | 1 line
Added quick hack for bzr
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r61853 | amaury.forgeotdarc | 2008-03-24 22:04:10 +0100 (Mon, 24 Mar 2008) | 4 lines
Issue2469: Correct a typo I introduced at r61793: compilation error with UCS4 builds.
All buildbots compile with UCS2...
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r61863 | neal.norwitz | 2008-03-25 05:17:38 +0100 (Tue, 25 Mar 2008) | 2 lines
Fix a bunch of UnboundLocalErrors when the tests fail.
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r61864 | neal.norwitz | 2008-03-25 05:18:18 +0100 (Tue, 25 Mar 2008) | 2 lines
Try to fix a bunch of compiler warnings on Win64.
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r61869 | neal.norwitz | 2008-03-25 07:35:10 +0100 (Tue, 25 Mar 2008) | 3 lines
Don't try to close a non-open file.
Don't let file removal cause the test to fail.
........
r61870 | neal.norwitz | 2008-03-25 08:00:39 +0100 (Tue, 25 Mar 2008) | 7 lines
Try to get this test to be more stable:
* disable gc during the test run because we are spawning objects and there
was an exception when calling Popen.__del__
* Always set an alarm handler so the process doesn't exit if the test fails
(should probably add assertions on the value of hndl_called in more places)
* Using a negative time causes Linux to treat it as zero, so disable that test.
........
r61874 | gregory.p.smith | 2008-03-25 08:31:28 +0100 (Tue, 25 Mar 2008) | 2 lines
Use a 32-bit unsigned int here, a long is not needed.
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r61889 | georg.brandl | 2008-03-25 12:59:51 +0100 (Tue, 25 Mar 2008) | 2 lines
Move declarations to block start.
........
No detailed change log; just check out the change log for the py3k-pep3137
branch. The most obvious changes:
- str8 renamed to bytes (PyString at the C level);
- bytes renamed to buffer (PyBytes at the C level);
- PyString and PyUnicode are no longer compatible.
I.e. we now have an immutable bytes type and a mutable bytes type.
The behavior of PyString was modified quite a bit, to make it more
bytes-like. Some changes are still on the to-do list.
svn+ssh://pythondev@svn.python.org/python/branches/p3yk
........
r55797 | neal.norwitz | 2007-06-07 00:00:57 -0700 (Thu, 07 Jun 2007) | 3 lines
Get rid of some remnants of classic classes. types.ClassType == type.
Also get rid of almost all uses of the types module and use the builtin name.
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r55798 | neal.norwitz | 2007-06-07 00:12:36 -0700 (Thu, 07 Jun 2007) | 1 line
Remove a use of types, verify commit hook works
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r55809 | guido.van.rossum | 2007-06-07 11:11:29 -0700 (Thu, 07 Jun 2007) | 2 lines
Fix syntax error introduced by Neal in last checkin.
........
svn+ssh://pythondev@svn.python.org/python/branches/p3yk
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r55077 | guido.van.rossum | 2007-05-02 11:54:37 -0700 (Wed, 02 May 2007) | 2 lines
Use the new print syntax, at least.
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r55142 | fred.drake | 2007-05-04 21:27:30 -0700 (Fri, 04 May 2007) | 1 line
remove old cruftiness
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r55143 | fred.drake | 2007-05-04 21:52:16 -0700 (Fri, 04 May 2007) | 1 line
make this work with the new Python
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r55162 | neal.norwitz | 2007-05-06 22:29:18 -0700 (Sun, 06 May 2007) | 1 line
Get asdl code gen working with Python 2.3. Should continue to work with 3.0
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r55164 | neal.norwitz | 2007-05-07 00:00:38 -0700 (Mon, 07 May 2007) | 1 line
Verify checkins to p3yk (sic) branch go to 3000 list.
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r55166 | neal.norwitz | 2007-05-07 00:12:35 -0700 (Mon, 07 May 2007) | 1 line
Fix this test so it runs again by importing warnings_test properly.
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r55167 | neal.norwitz | 2007-05-07 01:03:22 -0700 (Mon, 07 May 2007) | 8 lines
So long xrange. range() now supports values that are outside
-sys.maxint to sys.maxint. floats raise a TypeError.
This has been sitting for a long time. It probably has some problems and
needs cleanup. Objects/rangeobject.c now uses 4-space indents since
it is almost completely new.
........
r55171 | guido.van.rossum | 2007-05-07 10:21:26 -0700 (Mon, 07 May 2007) | 4 lines
Fix two tests that were previously depending on significant spaces
at the end of a line (and before that on Python 2.x print behavior
that has no exact equivalent in 3.0).
........
and .keys(), .items(), .values() return dict views.
The dict views aren't fully functional yet; in particular, they can't
be compared to sets yet. but they are useful as "iterator wells".
There are still 27 failing unit tests; I expect that many of these
have fairly trivial fixes, but there are so many, I could use help.
There's one major and one minor category still unfixed:
doctests are the major category (and I hope to be able to augment the
refactoring tool to refactor bona fide doctests soon);
other code generating print statements in strings is the minor category.
(Oh, and I don't know if the compiler package works.)
- The copy module now "copies" function objects (as atomic objects).
- dict.__getitem__ now looks for a __missing__ hook before raising
KeyError.
- Added a new type, defaultdict, to the collections module.
This uses the new __missing__ hook behavior added to dict (see above).
atomically, but deepcopy() didn't support this at all.
I don't see any reason for this, so I'm adding ClassType
to the set of types that are deep-copied atomically.
