[issue46081] Document the msg argument for assertRaises
New submission from Ram Rachum : The `msg` argument to the `assertRaises` function isn't documented. The documentation should say what this argument does. -- assignee: docs@python components: Documentation messages: 408587 nosy: cool-RR, docs@python priority: normal severity: normal status: open title: Document the msg argument for assertRaises versions: Python 3.10, Python 3.11, Python 3.6, Python 3.7, Python 3.8, Python 3.9 ___ Python tracker <https://bugs.python.org/issue46081> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue46081] Document the msg argument for assertRaises
Ram Rachum added the comment: Thanks, but people looking at a specific function might not guess that the documentation for one of its arguments is hiding somewhere on the long page. This is especially relevant with a confusing argument like `msg`, since it's tempting to think that this would be the message of the expected exception. -- ___ Python tracker <https://bugs.python.org/issue46081> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue46081] Document the msg argument for assertRaises
Ram Rachum added the comment: I'd include that same message you quoted, minus the list of functions, on each and every one of the functions that have this argument. -- ___ Python tracker <https://bugs.python.org/issue46081> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue46081] Document the msg argument for assertRaises
Ram Rachum added the comment: I disagree but I guess I'm in the minority here, so I'll close this issue. -- stage: -> resolved status: open -> closed ___ Python tracker <https://bugs.python.org/issue46081> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44733] Feature request: maxtasksperchild for ProcessPoolExecutor
Ram Rachum added the comment: Oh that sucks. Logan and Antoine worked on this feature for so long. Thanks for reporting Greg. -- ___ Python tracker <https://bugs.python.org/issue44733> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13163] `port` and `host` are confused in `_get_socket
New submission from Ram Rachum : Look here: http://hg.python.org/cpython/file/3313ce92cef7/Lib/smtplib.py#l279 `port` and `host` are confused. I saw this is fixed on 3.2; possibly it should be fixed in the next 2.7 micro release too. -- components: Library (Lib) messages: 145442 nosy: cool-RR priority: normal severity: normal status: open title: `port` and `host` are confused in `_get_socket versions: Python 2.7 ___ Python tracker <http://bugs.python.org/issue13163> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13163] `port` and `host` are confused in `_get_socket
Ram Rachum added the comment: The reason this bug bothered me is because I was debugging a Django app, and in the stacktrace's local variables I suddenly saw that `host` was `25`, which seemed like a bug to me and wasted me 5 minutes. So it's not a critical bug but it wasted my time. -- ___ Python tracker <http://bugs.python.org/issue13163> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13457] Display module name as string in `ImportError`
New submission from Ram Rachum :
Recently I was confronted with a mysterious error:
ImportError: No module named datetime
Firther investigation revealed that the cause was a pickling problem that ran
`__import__('datetime\r')`.
If `ImportError` would have shown the module name as a string, there would be
no ambiguity:
ImportError: No module named 'datetime\r'
--
components: Interpreter Core
messages: 148140
nosy: cool-RR
priority: normal
severity: normal
status: open
title: Display module name as string in `ImportError`
versions: Python 3.3
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[issue13457] Display module name as string in `ImportError`
Changes by Ram Rachum : -- type: -> behavior ___ Python tracker <http://bugs.python.org/issue13457> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13457] Display module name as string in `ImportError`
Changes by Ram Rachum : -- status: open -> closed ___ Python tracker <http://bugs.python.org/issue13457> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13600] rot_13 codec not working
New submission from Ram Rachum :
The `rot_13` codec is supposed to work like this, no?
>>> 'qwerty'.encode('utf-8')
b'qwerty'
>>> 'qwerty'.encode('rot_13')
Traceback (most recent call last):
File "", line 1, in
'qwerty'.encode('rot_13')
TypeError: encoder did not return a bytes object (type=str)
>>> b'qwerty'.decode('utf-8')
'qwerty'
>>> b'qwerty'.decode('rot_13')
Traceback (most recent call last):
File "", line 1, in
b'qwerty'.decode('rot_13')
File "C:\Python32\lib\encodings\rot_13.py", line 19, in decode
return (input.translate(rot13_map), len(input))
AttributeError: 'memoryview' object has no attribute 'translate'
--
components: Library (Lib)
messages: 149431
nosy: cool-RR
priority: normal
severity: normal
status: open
title: rot_13 codec not working
versions: Python 3.3
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[issue13600] rot_13 codec not working
Ram Rachum added the comment:
Then I suggest replacing this error message:
encoder did not return a bytes object (type=str)
and this one:
'memoryview' object has no attribute 'translate'
With something like:
Please use `codecs.lookup('rot-13').encode`
--
assignee: -> docs@python
components: +Documentation -Library (Lib)
nosy: +docs@python
resolution: invalid ->
status: closed -> open
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[issue11969] Can't launch multiproccessing.Process on methods
Ram Rachum added the comment: Why is this still marked as "test needed"? -- ___ Python tracker <http://bugs.python.org/issue11969> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11969] Can't launch multiproccessing.Process on methods
Ram Rachum added the comment: Diff attached, is it good? I'm not very experienced with diffs, I usually work with pull requests. -- keywords: +patch Added file: http://bugs.python.org/file22144/patch.diff ___ Python tracker <http://bugs.python.org/issue11969> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11969] Can't launch multiproccessing.Process on methods
Changes by Ram Rachum : Removed file: http://bugs.python.org/file22144/patch.diff ___ Python tracker <http://bugs.python.org/issue11969> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11969] Can't launch multiproccessing.Process on methods
Changes by Ram Rachum : Removed file: http://bugs.python.org/file22027/test.py ___ Python tracker <http://bugs.python.org/issue11969> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11969] Can't launch multiproccessing.Process on methods
Ram Rachum added the comment: Thanks for the `-u` tip and the correction to the code, Petri. I removed my previous files since yours is the definite one. And yeah, it's a Windows issue. -- ___ Python tracker <http://bugs.python.org/issue11969> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12449] Add accelerator "F" to button "Finish" in all MSI installers made by bdist_msi
New submission from Ram Rachum : I noticed that in MSI installers downloaded from PyPI don't have an accelerator on the Finish button. Please add an accelerator on it. (I think that "F" is the accepted one.) -- assignee: tarek components: Distutils messages: 139463 nosy: cool-RR, eric.araujo, tarek priority: normal severity: normal status: open title: Add accelerator "F" to button "Finish" in all MSI installers made by bdist_msi type: behavior versions: Python 3.3, Python 3.4 ___ Python tracker <http://bugs.python.org/issue12449> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12449] Add accelerator "F" to button "Finish" in all MSI installers made by bdist_msi
Ram Rachum added the comment: I can only do wxPython, I have no idea how Python's MSI installers work. I did a quick search for "Finish" in the codebase but could find any obvious place to add the accelerator. "As a new feature, this cannot go into distutils." Seriously? Why? -- ___ Python tracker <http://bugs.python.org/issue12449> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12522] Implement `os.startfile` under Linux and Mac
New submission from Ram Rachum : I want to use `os.startfile` to open a folder in Explorer/Nautilus/Finder. The documentation says that it's only implemented on Windows: http://docs.python.org/dev/library/os.html#os.startfile See discussion on Python-ideas here: https://groups.google.com/forum/?hl=en#!topic/python-ideas/LL0SavbKrEA Is there a good reason why `os.startfile` is implemented only on Windows? -- components: Library (Lib) messages: 140057 nosy: cool-RR priority: normal severity: normal status: open title: Implement `os.startfile` under Linux and Mac versions: Python 3.3 ___ Python tracker <http://bugs.python.org/issue12522> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3177] implement os.startfile on posix and MacOSX
Changes by Ram Rachum : -- nosy: +cool-RR ___ Python tracker <http://bugs.python.org/issue3177> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12543] `issubclass(collections.deque, collections.Sequence) == False`
New submission from Ram Rachum : Is there a good reason that `issubclass(collections.deque, collections.Sequence) == False`? What's not-sequence-y about `deque`? -- messages: 140206 nosy: cool-RR priority: normal severity: normal status: open title: `issubclass(collections.deque, collections.Sequence) == False` ___ Python tracker <http://bugs.python.org/issue12543> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3177] implement os.startfile on posix and MacOSX
Ram Rachum added the comment: Eric, I have no problem with this function being placed in `shutil` instead of `os`, as long as it's implemented and it's in the standard library, and people don't have to use subprocess to run open or xdg-open themselves as I currently do. So I have no problem with renaming this bug to "Add shutil.open". -- ___ Python tracker <http://bugs.python.org/issue3177> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12583] More detailed `ImportError` messages
New submission from Ram Rachum : I've been frustrated so many times by `ImportError: cannot import name foo`. Right now I'm debugging some problem on a PAAS server (with no SSH access), and the server returns a traceback of `cannot import name foo`, and I don't have any idea what it means. It could mean that the file isn't there. It could mean that there's a circular import problem. Sometimes it happens when you go over Windows XP's path length limit! Please provide a useful explanation, like this: ImportError: Cannot import `foo` because no file foo.py* or folder foo exists. ImportError: Cannot import foo module because no __init__.py* file exists in the foo folder. ImportError: Cannot import foo because of a circular import problem with bar. ImportError: Cannot import foo because the foo module file's path is bigger than Windows XP's path length limit. Etcetera for any other reason that might cause an `ImportError`. -- components: Interpreter Core messages: 140614 nosy: cool-RR priority: normal severity: normal status: open title: More detailed `ImportError` messages versions: Python 3.3 ___ Python tracker <http://bugs.python.org/issue12583> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12583] More detailed `ImportError` messages
Ram Rachum added the comment: As long as those attributes are reflected in the string in human language, why not. -- ___ Python tracker <http://bugs.python.org/issue12583> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12583] More detailed `ImportError` messages
Ram Rachum added the comment: What's the problem with detecting circular imports? Mind you that we only need a post-mortem analysis to check why the import failed; so after the import failed, we could check whether our import stack has a loop in it. I'm not familiar with the ImportWarning regarding `__init__.py`. Is this written about anywhere? -- ___ Python tracker <http://bugs.python.org/issue12583> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12583] More detailed ImportError messages
Ram Rachum added the comment: Brett: Why does it matter that it will be costly? It's a post-mortem activity anyway, usually done when something critical failed and the entire system isn't working. Why would functions need to be looked at? I mean, isn't a circular import when you try to import a module `foo` while in a lower stack level you haven't finished importing `foo` yet? Does it get trickier than that? -- ___ Python tracker <http://bugs.python.org/issue12583> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12583] More detailed ImportError messages
Ram Rachum added the comment: Brett, I checked out the two pieces of documentation you referred to, they have very little information about ImportWarning other than "Base class for warnings about probable mistakes in module imports." -- ___ Python tracker <http://bugs.python.org/issue12583> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12583] More detailed ImportError messages
Ram Rachum added the comment: David, I don't think you've read my message carefully enough. I'm well aware that there are other ways in Python to import than the `import` statement. I'm proposing that it doesn't matter. I asked, "isn't a circular import when you try to import a module `foo` while in a lower stack level you haven't finished importing `foo` yet?" If this is true, then you just need to have some kind of flag for each module saying "This module is currently being imported", which you set to `True` when you start importing and back to `False` when you finished importing. (It doesn't have to look exactly like this, it could be a context manager, or alternatively a centralized list of all module that are currently in the middle of an import.) Then when you have an `ImportError`, you check whether the module that the user tried to import has that flag raised, and if so notify him that it's probably a circular import problem. Will that work? -- ___ Python tracker <http://bugs.python.org/issue12583> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12583] More detailed ImportError messages
Ram Rachum added the comment: Thanks for explaining, I guess it's too complicated. -- ___ Python tracker <http://bugs.python.org/issue12583> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12653] Provide accelerators for all buttons in Windows installers
New submission from Ram Rachum : I was installing Python 3.2.1 on my laptop today, and was unable to efficiently use the keyboard in order to navigate the installation dialogs. Every button should have an accelerator, e.g. "Next" should be "&Next" so Alt-N will press it. (I don't know whether you use the ampersand notation or something else.) -- messages: 141340 nosy: cool-RR priority: normal severity: normal status: open title: Provide accelerators for all buttons in Windows installers versions: Python 3.3, Python 3.4 ___ Python tracker <http://bugs.python.org/issue12653> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12895] In MSI/EXE installer, allow installing Python modules in free path
New submission from Ram Rachum : Currently, when you use an MSI installer (and possibly also EXE) for a Python module, it automatically detects the location of your various system's Python installations. This is very convenient. However, this can be a problem sometimes, if your Python installation doesn't conform to what's required by the installer. For example, if you want to install the module in a virtualenv: http://serverfault.com/questions/305008/installing-compiled-python-modules-on-windows-on-a-virtual-env The installer doesn't give you any option to manually enter a path of a Python installation, so you just can't install! The installer's automatic Python-finding mechanism should degrade gracefully; it should offer to automatically find your Python installation, but it should allow you to bypass it and type it in yourself. -- assignee: tarek components: Distutils2 messages: 143503 nosy: alexis, cool-RR, eric.araujo, tarek priority: normal severity: normal status: open title: In MSI/EXE installer, allow installing Python modules in free path versions: Python 3.3 ___ Python tracker <http://bugs.python.org/issue12895> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12895] In MSI/EXE installer, allow installing Python modules in free path
Ram Rachum added the comment: Martin, what do you mean "administrative installation"? -- ___ Python tracker <http://bugs.python.org/issue12895> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9823] OrderedDict is comparable to dict
New submission from Ram Rachum :
OrderedDict is currently comparable to dict.
I think this is not logical, because a dict doesn't have order, and having an
identical order is a necessary condition for a match.
I think that comparing an OrderedDict with a dict makes as much sense as
comparing a tuple with a set, and that's currently not allowed. (Always returns
False)
Here's a disturbing code snippet executed in Python 3.2a1:
>>> from collections import OrderedDict
>>> d1 = OrderedDict(((1, 2), (3, 4)))
>>> d2 = OrderedDict(((3, 4), (1, 2)))
>>> d1 == d2
False
>>> d1 == {1: 2, 3: 4} == d2
True
--
components: Library (Lib)
messages: 116027
nosy: cool-RR
priority: normal
severity: normal
status: open
title: OrderedDict is comparable to dict
type: behavior
versions: Python 2.7, Python 3.2, Python 3.3
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[issue9823] OrderedDict is comparable to dict
Ram Rachum added the comment: Thanks Benjamin. Was there a discussion about this in the mailing list? If so can you give me a link to it? -- ___ Python tracker <http://bugs.python.org/issue9823> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9872] `a.b.my_function is not b.my_function` when `a` and `b` are both on `sys.path`
New submission from Ram Rachum : Let's say you have this structure: a\ __init__.py b\ __init__.py In `b.__init__` a function called `my_function` is defined. And assume that `a` and `b` are both on `sys.path`. Then this situation happens: >>> import a.b >>> import b >>> a.b.my_function is b.my_function False >>> a.b.my_function >>> b.my_function >>> a.b.my_function.__module__ 'a.b' >>> b.my_function.__module__ 'b' It seems that `a.b.my_function` and `b.my_function` are different objects. -- messages: 116536 nosy: cool-RR priority: normal severity: normal status: open title: `a.b.my_function is not b.my_function` when `a` and `b` are both on `sys.path` type: behavior versions: Python 2.6, Python 3.1, Python 3.2 ___ Python tracker <http://bugs.python.org/issue9872> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9872] `a.b.my_function is not b.my_function` when `a` and `b` are both on `sys.path`
Ram Rachum added the comment: Benjamin, This behavior is involved in a problem I have with Django. When using Django, you have apps that live inside a project: my_project\ __init__.py my_app\ __init__.py views.py So if you have a view function in `views.py`, it will have two separate identities, and that causes problems. Do you have an idea what I can do about it? -- ___ Python tracker <http://bugs.python.org/issue9872> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9898] cProfile.runctx doesn't allow sort argument
New submission from Ram Rachum : The `cProfile.runctx` function currently doesn't allow using the `sort` argument. For some reason the `sort` argument is allowed in `run` but not in `runctx`. Attached is a patch that allows using `sort` in `runctx`. -- components: Library (Lib) files: cProfile.patch keywords: patch messages: 116880 nosy: cool-RR priority: normal severity: normal status: open title: cProfile.runctx doesn't allow sort argument type: feature request versions: Python 2.7, Python 3.2, Python 3.3 Added file: http://bugs.python.org/file18932/cProfile.patch ___ Python tracker <http://bugs.python.org/issue9898> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9898] cProfile.runctx doesn't allow sort argument
Ram Rachum added the comment: Is this going into 3.2? -- ___ Python tracker <http://bugs.python.org/issue9898> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10011] `except` doesn't use `isinstance`
New submission from Ram Rachum : Is there a reason why `execpt` compares base classes instead of using `isinstance`? This prevents using `__instancecheck__` to override the instance check. -- components: Interpreter Core messages: 117844 nosy: cool-RR priority: normal severity: normal status: open title: `except` doesn't use `isinstance` versions: Python 2.5, Python 2.6, Python 2.7, Python 3.1, Python 3.2, Python 3.3 ___ Python tracker <http://bugs.python.org/issue10011> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10011] `except` doesn't use `isinstance`
Ram Rachum added the comment: I don't understand the infinite recursion argument. If there's such an infinite recursion, wouldn't it be due to a bug in the user's implementation of __instancecheck__? -- ___ Python tracker <http://bugs.python.org/issue10011> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10011] `except` doesn't use `isinstance`
Ram Rachum added the comment: Also, how important is the performance of exception checking *after* an exception was raised? I mean, wouldn't it matter only for programs that raise and catch hundreds of exceptions a second? -- ___ Python tracker <http://bugs.python.org/issue10011> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue8289] multiprocessing.Process.__init__ pickles all arguments
Changes by Ram Rachum : -- versions: +Python 3.3 -Python 3.2 ___ Python tracker <http://bugs.python.org/issue8289> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9276] pickle should support methods
Ram Rachum added the comment: I also miss being able to pickle unbound methods on Python 3. I don't think there's an interest in pickling the actual code objects. In my opinion, unbound methods should be pickled exactly like all the other Python definitions, such as bound methods, top-level functions, and classes: They should be pickled by name. IIUC, the challenge is how to figure out on which class an unbound method is defined. I'm using the term "unbound method" colloquially, I know it's implemented as a function. So perhaps Python needs to be changed to give unbound methods some attribute that will tell on which class they're defined? -- nosy: +cool-RR ___ Python tracker <http://bugs.python.org/issue9276> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9276] pickle should support methods
Changes by Ram Rachum : -- versions: +Python 3.3 -Python 3.2 ___ Python tracker <http://bugs.python.org/issue9276> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11299] Allow deepcopying and pickling paused generators
New submission from Ram Rachum : Please allow to deepcopy and to pickle paused generators, including all their state. This is implemented in Pypy: Python 2.5.2 (335e875cb0fe, Dec 28 2010, 20:31:56) [PyPy 1.4.1] on win32 Type "copyright", "credits" or "license()" for more information. DreamPie 1.1.1 >>> import pickle, copy >>> def next(thing): # For compatibility ... return thing.next() >>> def g(): ... for i in range(4): ... yield i >>> list(g()) [0, 1, 2, 3] >>> live_generator = g() >>> next(live_generator) 0 >>> next(live_generator) 1 Now `live_generator` holds a generator which is in the middle of its operation. It went through 0 and 1, and it still has 2 and 3 to yield. We deepcopy it: >>> live_generator_deepcopy = copy.deepcopy(live_generator) The deepcopied generator assumes the same state of the original one. Let's exhaust it: >>> list(live_generator_deepcopy) [2, 3] >>> list(live_generator_deepcopy) [] Pypy also lets us pickle and unpickle the live generator: >>> live_generator_pickled = pickle.dumps(live_generator) >>> live_generator_unpickled = pickle.loads(live_generator_pickled) >>> list(live_generator_unpickled) [2, 3] >>> list(live_generator_unpickled) [] And the original live generator was unchanged by all these operations: >>> list(live_generator) [2, 3] >>> list(live_generator) [] All the above was demonstrated in Pypy. In Python 3.2, trying to pickle a live generator raises this exception: >>> pickle.dumps(live_generator) Traceback (most recent call last): File "", line 1, in _pickle.PicklingError: Can't pickle : attribute lookup builtins.generator failed And trying to deepcopy one raises this exception: >>> copy.deepcopy(live_generator) Traceback (most recent call last): File "", line 1, in File "c:\Python32\lib\copy.py", line 174, in deepcopy y = _reconstruct(x, rv, 1, memo) File "c:\Python32\lib\copy.py", line 285, in _reconstruct y = callable(*args) File "c:\Python32\lib\copyreg.py", line 88, in __newobj__ return cls.__new__(cls, *args) TypeError: object.__new__(generator) is not safe, use generator.__new__() It would be nice if Python 3.2 could pickle and deepcopy live generators. -- components: Library (Lib) messages: 129213 nosy: cool-RR priority: normal severity: normal status: open title: Allow deepcopying and pickling paused generators type: feature request versions: Python 3.3 ___ Python tracker <http://bugs.python.org/issue11299> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11299] Allow deepcopying and pickling paused generators
Ram Rachum added the comment: P.S. I'm willing to write a test-case if it will help. -- ___ Python tracker <http://bugs.python.org/issue11299> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11299] Allow deepcopying and pickling paused generators
Ram Rachum added the comment: Tests attached. -- Added file: http://bugs.python.org/file20898/test_live_generator.py ___ Python tracker <http://bugs.python.org/issue11299> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11299] Allow deepcopying and pickling paused generators
Ram Rachum added the comment: Hi Alexandre, I read your blog post, but I don't understand-- Why does bytecode need to be pickled in order to pickle live generators? I understand that the local variables need to be pickled, (and let's assume they're all pickleable,) and that a pointer to the current instruction needs to be pickled, but why the bytecode? When you pickle a normal function or a class, no bytecode gets pickled, so why does it have to be pickled here? -- ___ Python tracker <http://bugs.python.org/issue11299> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11299] Allow deepcopying and pickling paused generators
Ram Rachum added the comment: *"generator objects do not have names we can refer to"* How about referring to the generator function that created them and to all the arguments? Regarding instruction pointer, I really don't know the internals of how this works. Can we make some arrangement so we can specify line number (and possibly column number too) as a cross-interpreter instruction pointer? -- ___ Python tracker <http://bugs.python.org/issue11299> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11356] Include module name on ImportError
Changes by Ram Rachum : -- nosy: +cool-RR ___ Python tracker <http://bugs.python.org/issue11356> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1559549] ImportError needs attributes for module and file name
Changes by Ram Rachum : -- nosy: +cool-RR ___ Python tracker <http://bugs.python.org/issue1559549> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9276] pickle should support methods
Ram Rachum added the comment: Okay, as an initial suggestion, how about we give every function a `.__parent_class__` attribute saying which class it is a method of? I feel this is a bit of a duct tape solution, but I don't see any other alternative. -- ___ Python tracker <http://bugs.python.org/issue9276> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9276] pickle should support methods
Ram Rachum added the comment: Raymond: I don't think this matters. We don't need a canonical `.__parent_class__`, we just need to know where that function is defined so we could find it when unpickling. In the example that you gave, `f` would have a `.__parent_class__` of `None`, and it would be pickleable because it would be found on the top-level of the module it's defined on. -- ___ Python tracker <http://bugs.python.org/issue9276> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9276] pickle should support methods
Ram Rachum added the comment: > This isn't worth introducing poorly thought out hacks. Being able to pickle unbound methods is important. In my project I have objects that refer to unbound methods. Now these objects are unpickleable. I can't save them to disk and I can't use the multiprocessing module on them. That's a big problem. -- ___ Python tracker <http://bugs.python.org/issue9276> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9276] pickle should support methods
Ram Rachum added the comment: > [...] try to whip up a patch and upload it if it ends up not too hackish. To have a non-hackish patch we need a non-hackish idea. The `.__parent_class__` idea looks hackish to me, but now that I think about it, how is it more hackish than a function's `.__module__` attribute? I mean, a function's `.__module__` attribute says on which module the function was originally defined, but the function could be accessible on any other module and any other namespace or class. Its `.__module__` would remain constant, because it's the one place where you are guaranteed to be able to find the function, assuming it's defined in the top-level. So the `.__module__` attribute is used in unpickling the function. How is the `.__parent_class__` suggestion more hackish than `.__module__`? -- ___ Python tracker <http://bugs.python.org/issue9276> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9276] pickle should support methods
Ram Rachum added the comment: Amaury: I don't think ForkingPickler works for unbound methods defined in user code, which are implemented as functions. I think it only works for method-descriptors and wrapper-descriptors. -- ___ Python tracker <http://bugs.python.org/issue9276> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9276] pickle should support methods
Ram Rachum added the comment: Amaury: Your example succeeds on Linux but fails on Windows: $ python3.2 main.py CALLED Traceback (most recent call last): File "C:\Python32\Lib\pickle.py", line 679, in save_global klass = getattr(mod, name) AttributeError: 'module' object has no attribute 'foo' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "main.py", line 7, in p.start(); p.join() File "C:\Python32\Lib\multiprocessing\process.py", line 130, in start self._popen = Popen(self) File "C:\Python32\Lib\multiprocessing\forking.py", line 267, in __init__ dump(process_obj, to_child, HIGHEST_PROTOCOL) File "C:\Python32\Lib\multiprocessing\forking.py", line 190, in dump ForkingPickler(file, protocol).dump(obj) File "C:\Python32\Lib\pickle.py", line 237, in dump self.save(obj) File "C:\Python32\Lib\pickle.py", line 344, in save self.save_reduce(obj=obj, *rv) File "C:\Python32\Lib\pickle.py", line 432, in save_reduce save(state) File "C:\Python32\Lib\pickle.py", line 299, in save f(self, obj) # Call unbound method with explicit self File "C:\Python32\Lib\pickle.py", line 623, in save_dict self._batch_setitems(obj.items()) File "C:\Python32\Lib\pickle.py", line 656, in _batch_setitems save(v) File "C:\Python32\Lib\pickle.py", line 299, in save f(self, obj) # Call unbound method with explicit self File "C:\Python32\Lib\pickle.py", line 683, in save_global (obj, module, name)) _pickle.PicklingError: Can't pickle : it's not found as mod.foo User@TURING ~/Desktop/temp $ Traceback (most recent call last): File "", line 1, in File "C:\Python32\Lib\multiprocessing\forking.py", line 370, in main self = load(from_parent) EOFError -- ___ Python tracker <http://bugs.python.org/issue9276> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue9276] pickle should support methods
Ram Rachum added the comment: I don't have the time and the ability to write the patch that implements this. I'll be happy to write tests if you think this will help. -- ___ Python tracker <http://bugs.python.org/issue9276> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11733] Implement a `Counter.elements_count` method
New submission from Ram Rachum : I suggest a `Counter.elements_count()` method should be added, that would give the same answer as `sum(counter.itervalues())`. -- components: Library (Lib) messages: 132708 nosy: cool-RR, rhettinger priority: normal severity: normal status: open type: feature request versions: Python 3.3 ___ Python tracker <http://bugs.python.org/issue11733> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11775] `bool(Counter({'a': 0'})) is True`
New submission from Ram Rachum :
bool(Counter({'a': 0'})) is True.
Is this wise? I want to be able to do:
if my_counter:
whatever
To check whether my counter has any elements. Currently this seems to be
impossible because of this bug.
Will we have to keep this weird behavior because of backwards compatibility? If
so, perhaps `.elements` could be turned into a smart object so we could at
least do `if my_counter.elements():` and get the expected result.
If you want a patch let me know and I'll write one.
--
components: Library (Lib)
messages: 133076
nosy: cool-RR
priority: normal
severity: normal
status: open
title: `bool(Counter({'a': 0'})) is True`
versions: Python 3.3, Python 3.4
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[issue11775] `bool(Counter({'a': 0})) is True`
Changes by Ram Rachum :
--
title: `bool(Counter({'a': 0'})) is True` -> `bool(Counter({'a': 0})) is True`
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[issue11775] `bool(Counter({'a': 0})) is True`
Ram Rachum added the comment: Before coding a test I want to know whether we can even make this change with regards to backwards compatibility. -- ___ Python tracker <http://bugs.python.org/issue11775> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11775] `bool(Counter({'a': 0})) is True`
Ram Rachum added the comment: Hmm... So how about making `elements` a smart object which will implement `__bool__`? Then we could give it a `__len__` too and be rid of issue11733. -- ___ Python tracker <http://bugs.python.org/issue11775> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11775] `bool(Counter({'a': 0})) is True`
Ram Rachum added the comment: How is it "not the Python way"? Why is it okay to make `dict.keys` into a smart object but it's not okay to make `Counter.elements` a smart object? These are not random ideas. I'm using `Counter` in a contract project and I find the need to make `if counter:` checks. I'll ask on Python-ideas to get people's opinions. -- ___ Python tracker <http://bugs.python.org/issue11775> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11908] Weird `slice.stop or sys.maxint`
New submission from Ram Rachum : In the documentation for `itertools.islice` I see this line: it = iter(xrange(s.start or 0, s.stop or sys.maxint, s.step or 1)) Is it really okay to do `s.stop or sys.maxint`? I'm assuming this was targeting `None`, but what if `s.stop == 0`? And `s.step` could (pathologically) be `0` too, no? -- assignee: docs@python components: Documentation messages: 134276 nosy: cool-RR, docs@python priority: normal severity: normal status: open title: Weird `slice.stop or sys.maxint` type: behavior versions: Python 2.5, Python 2.6, Python 2.7, Python 3.1, Python 3.2, Python 3.3, Python 3.4 ___ Python tracker <http://bugs.python.org/issue11908> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue8400] zipimporter find_module fullname mis-documented
Ram Rachum added the comment: I was bitten now as well... -- nosy: +cool-RR ___ Python tracker <http://bugs.python.org/issue8400> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11969] Can't launch Process on built-in static method
New submission from Ram Rachum : Hello, I found this bit in my inbox, I forgot why I cared about it, but it raises an exception (at least on Windows): >>> import multiprocessing >>> p = multiprocessing.Process(target=bytes.maketrans, args=(b'abc', b'xyz')) >>> p.start() Traceback (most recent call last): File "C:\Python32\Lib\pickle.py", line 679, in save_global klass = getattr(mod, name) AttributeError: 'module' object has no attribute 'maketrans' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "", line 1, in File "C:\Python32\Lib\multiprocessing\process.py", line 130, in start self._popen = Popen(self) File "C:\Python32\Lib\multiprocessing\forking.py", line 267, in __init__ dump(process_obj, to_child, HIGHEST_PROTOCOL) File "C:\Python32\Lib\multiprocessing\forking.py", line 190, in dump ForkingPickler(file, protocol).dump(obj) File "C:\Python32\Lib\pickle.py", line 237, in dump self.save(obj) File "C:\Python32\Lib\pickle.py", line 344, in save self.save_reduce(obj=obj, *rv) File "C:\Python32\Lib\pickle.py", line 432, in save_reduce save(state) File "C:\Python32\Lib\pickle.py", line 299, in save f(self, obj) # Call unbound method with explicit self File "C:\Python32\Lib\pickle.py", line 623, in save_dict self._batch_setitems(obj.items()) File "C:\Python32\Lib\pickle.py", line 656, in _batch_setitems save(v) File "C:\Python32\Lib\pickle.py", line 299, in save f(self, obj) # Call unbound method with explicit self File "C:\Python32\Lib\pickle.py", line 683, in save_global (obj, module, name)) _pickle.PicklingError: Can't pickle : it's not found as __main__.maketrans If you do the same things with `threading.Thread`, it works, but for `multiprocessing.Process` it doesn't. Is this a general problem with pickling "unbound methods"? -- components: Interpreter Core, Library (Lib) messages: 134907 nosy: cool-RR priority: normal severity: normal status: open title: Can't launch Process on built-in static method type: behavior versions: Python 3.3, Python 3.4 ___ Python tracker <http://bugs.python.org/issue11969> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11969] Can't launch multiproccessing.Process on methods
Ram Rachum added the comment: Test attached. -- Added file: http://bugs.python.org/file22027/test.py ___ Python tracker <http://bugs.python.org/issue11969> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12128] Allow `abc.abstractproperty` to be overridden by a data attribute
New submission from Ram Rachum : When you create an `abc.abstractproperty` on a class, any subclass must override it as an actual property in order to be instantiable. But sometimes you want to override it with a data attribute instead, i.e. `self.x = 5` instead of `x = property(...)`. It would be nice if doing `self.x = 5` would satisfy `abc.abstractproperty` and allow the subclass to be instantiable. -- components: Library (Lib) messages: 136388 nosy: cool-RR priority: normal severity: normal status: open title: Allow `abc.abstractproperty` to be overridden by a data attribute type: feature request versions: Python 3.3, Python 3.4 ___ Python tracker <http://bugs.python.org/issue12128> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12128] Allow `abc.abstractproperty` to be overridden by a data attribute
Ram Rachum added the comment: Daniel, the behavior you describe is already present in Python 3.2. -- ___ Python tracker <http://bugs.python.org/issue12128> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12128] Allow `abc.abstractproperty` to be overridden by a data attribute
Ram Rachum added the comment: Eric, do you think that a solution can be made by calling `__init__` inside of `ABCMeta.__new__` and then afterwards checking the instance for attributes? -- ___ Python tracker <http://bugs.python.org/issue12128> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12128] Allow `abc.abstractproperty` to be overridden by a data attribute
Ram Rachum added the comment: Ah, I got confused, there's no way we can call `__init__` in `ABCMeta.__new__`. -- ___ Python tracker <http://bugs.python.org/issue12128> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10569] abc: `issubclass([], my_abstract_type)` raises exception
New submission from Ram Rachum : >>> import abc >>> class A(object, metaclass=abc.ABCMeta): ... pass >>> issubclass([], A) Traceback (most recent call last): File "", line 1, in issubclass([], A) File "c:\Python32\lib\abc.py", line 137, in __subclasscheck__ if subclass in cls._abc_cache: File "c:\Python32\lib\_weakrefset.py", line 69, in __contains__ return ref(item) in self.data TypeError: cannot create weak reference to 'list' object I should be able to check whether an object is a subclass of something without confirming it's a type first. I think this call should just return False. -- components: Library (Lib) messages: 122736 nosy: cool-RR priority: normal severity: normal status: open title: abc: `issubclass([], my_abstract_type)` raises exception type: behavior versions: Python 3.2 ___ Python tracker <http://bugs.python.org/issue10569> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10569] abc: `issubclass([], my_abstract_type)` raises exception
Ram Rachum added the comment: But do you think it's a good idea that `issubclass(1, list)` raises an exception? Why not simply return `False`? Do you think there's someone out there who's counting on `issubclass` to raise an exception? -- status: closed -> open ___ Python tracker <http://bugs.python.org/issue10569> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10569] abc: `issubclass([], my_abstract_type)` raises exception
Ram Rachum added the comment: Amaury, I am aware of what `issubclass` does and what `isinstance` does. I am not manually feeding `[]` into `issubclass`. I have an object which can be either a list, or a string, or a callable, or a type. And I want to check whether it's a sub-class of some base class. So I don't think I should be taking extra precautions before using `issubclass`: If my object is not a subclass of the given base class, I should just get `False`. -- ___ Python tracker <http://bugs.python.org/issue10569> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10893] The docs mark staticmethod as a function
New submission from Ram Rachum : The Python documentation uses :func:`staticmethod` to describe staticmethod, while staticmethod is a type. I want to link to the Python documentation from my project's documentation using Intersphinx, and I wouldn't want to mislead my users by marking static method as a function. -- assignee: d...@python components: Documentation messages: 126090 nosy: cool-RR, d...@python priority: normal severity: normal status: open title: The docs mark staticmethod as a function type: behavior versions: Python 2.5, Python 2.6, Python 2.7, Python 3.1, Python 3.2, Python 3.3 ___ Python tracker <http://bugs.python.org/issue10893> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10893] The docs mark staticmethod as a function
Ram Rachum added the comment: But why? What's the reason for that? Why mislabel a type as a function? -- ___ Python tracker <http://bugs.python.org/issue10893> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10893] The docs mark staticmethod as a function
Ram Rachum added the comment: I'm really confused by your comment. "int being a function is really a CPython implementation detail" I don't understand this. I should be able to do isinstance(x, int) in all implementations of Python, no? So `int` must be a class across all Python implementation, no? "why would you want to consider the detail that it’s really a C function?" I don't want to consider the detail that int is a C function, I thought that int is a class and expected it to be marked :class:`int` in the documentation. -- ___ Python tracker <http://bugs.python.org/issue10893> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue10893] The docs mark staticmethod as a function
Ram Rachum added the comment: So if int is officially a class, why not start doing :class:`int` instead of :func:`int`? "they’re marked up as functions, so you should treat them as functions." Here, I've treated staticmethod as a function: >>> assert isinstance(staticmethod, types.FunctionType) Traceback (most recent call last): File "", line 1, in assert isinstance(staticmethod, types.FunctionType) AssertionError I get an error. So I understand that you are using Sphinx's :func: role in a liberal way; You consider it okay to use it to mark anything that is callable, regardless of whether it's a function or a class. Am I right? This looks to me like an abuse of Sphinx notation. When I read documentation I don't want to be second-guessing the author's intentions. If someone writes :func:`whatever` I expect `whatever` to be a function and not a class. Perhaps we need a :callable: role? -- status: closed -> open ___ Python tracker <http://bugs.python.org/issue10893> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7946] Convoy effect with I/O bound threads and New GIL
Changes by Ram Rachum : -- nosy: +cool-RR ___ Python tracker <http://bugs.python.org/issue7946> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue8289] multiprocessing.Process.__init__ pickles all arguments
New submission from Ram Rachum : Currently, when you create a Process, all arguments you pass to its __init__ get pickled. I understood this is done because arguments to __init__ almost always become attributes to the Process. Like this: def MyProcess(multiprocessing.Process): def __init__(self, whatever): self.whatever = whatever Of course, attributes must be pickled so they can be accessed from the separate process (on Windows). And indeed in most cases all arguments to __init__ become attributes, so this makes sense. But, in some cases you pass in arguments to __init__ that do not become attributes. In my case, __init__ takes an object, and takes some attributes of this object as attributes to itself. The object is unpicklable, but the attributes are. So I had to make some ugly workaround to make the program run. So I think it would be better if Process would be smart enough to pickle only the arguments that get set as attributes. -- components: Library (Lib) messages: 102172 nosy: cool-RR severity: normal status: open title: multiprocessing.Process.__init__ pickles all arguments type: feature request versions: Python 2.6, Python 2.7, Python 3.1, Python 3.2, Python 3.3 ___ Python tracker <http://bugs.python.org/issue8289> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue8289] multiprocessing.Process.__init__ pickles all arguments
Ram Rachum added the comment: Sorry, I accidentally typed "def" instead of "class" in my code sample. -- ___ Python tracker <http://bugs.python.org/issue8289> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue37937] Mention ``frame.f_trace`` in :func:`sys.settrace` docs.
Change by Ram Rachum : -- assignee: docs@python components: Documentation nosy: cool-RR, docs@python priority: normal pull_requests: 15149 severity: normal status: open title: Mention ``frame.f_trace`` in :func:`sys.settrace` docs. type: enhancement versions: Python 3.9 ___ Python tracker <https://bugs.python.org/issue37937> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue37937] Mention ``frame.f_trace`` in :func:`sys.settrace` docs.
Ram Rachum added the comment: Serhiy: I confirmed what you're saying and corrected the documentation. Could you please review? -- ___ Python tracker <https://bugs.python.org/issue37937> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue38422] Clarify docstrings of pathlib suffix(es)
New submission from Ram Rachum : I'm writing a PR for this right now. -- components: Library (Lib) messages: 354279 nosy: cool-RR priority: normal severity: normal status: open title: Clarify docstrings of pathlib suffix(es) versions: Python 3.9 ___ Python tracker <https://bugs.python.org/issue38422> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue38422] Clarify docstrings of pathlib suffix(es)
Change by Ram Rachum : -- keywords: +patch pull_requests: +16264 stage: -> patch review pull_request: https://github.com/python/cpython/pull/16679 ___ Python tracker <https://bugs.python.org/issue38422> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue38724] Implement subprocess.Popen.__repr__
New submission from Ram Rachum : I was working with a Popen object recently in the shell and it was annoying to see the `` display. It would be nice to get some kind of minimal detail about the Popen, for example its args and return code, if finished. -- components: Library (Lib) messages: 356149 nosy: cool-RR, pitrou priority: normal severity: normal status: open title: Implement subprocess.Popen.__repr__ type: enhancement versions: Python 3.9 ___ Python tracker <https://bugs.python.org/issue38724> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue38724] Implement subprocess.Popen.__repr__
Change by Ram Rachum : -- nosy: +taleinat ___ Python tracker <https://bugs.python.org/issue38724> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44733] Feature request: maxtasksperchild for ProcessPoolExecutor
New submission from Ram Rachum : I love `concurrent.futures`, and I'd like to use it wherever I can. There's a feature in `multiprocessing.Pool` that I wish would also be available in `ProcessPoolExecutor`: The `maxtasksperchild` argument. Documentation: "maxtasksperchild is the number of tasks a worker process can complete before it will exit and be replaced with a fresh worker process, to enable unused resources to be freed. The default maxtasksperchild is None, which means worker processes will live as long as the pool." I want to be able to set it to 1, so each process will only execute one task and then be replaced with a fresh process. -- components: Library (Lib) messages: 398143 nosy: cool-RR, pitrou priority: normal severity: normal status: open title: Feature request: maxtasksperchild for ProcessPoolExecutor type: enhancement versions: Python 3.11 ___ Python tracker <https://bugs.python.org/issue44733> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue44733] Feature request: maxtasksperchild for ProcessPoolExecutor
Ram Rachum added the comment: Awesome. You can link to experimental code here. Even if it were not accepted to Python, it could be useful for me and for other people who might see this issue. -- ___ Python tracker <https://bugs.python.org/issue44733> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12653] Provide accelerators for all buttons in Windows installers
Ram Rachum added the comment: I confirmed now in the 3.10 installer on Windows that accelerators are working. Thank you! -- resolution: out of date -> fixed ___ Python tracker <https://bugs.python.org/issue12653> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue28953] Use `raise from` when raising new IncompleteRead
Ram Rachum added the comment: Interesting feature Irit, thank you Two things: 1. Is there better documentation for that feature than what was in the CL of the issue you linked to? Because that documentation was more lawyery than explanatory. 2. If I understand correctly, the note is meant for things that don't exactly fit in the exception message for some reason or another. (A better documentation with examples would have given me a clearer understanding of your use cases.) I'm not sure why the message included here should be relegated to a note. -- ___ Python tracker <https://bugs.python.org/issue28953> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue28953] Use `raise from` when raising new IncompleteRead
Ram Rachum added the comment: This might work here, but you'd need to be sure there isn't any important code that looks at the IncompleteRead exception and expects the data to be in its message. Also I hope that various tools like IDEs would learn quickly that they need to display the note in their traceback views, otherwise all of these notes would be hidden from many people. -- ___ Python tracker <https://bugs.python.org/issue28953> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue28953] Use `raise from` when raising new IncompleteRead
Ram Rachum added the comment: Okay, works for me. -- ___ Python tracker <https://bugs.python.org/issue28953> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue45990] Exception notes need more documentation
New submission from Ram Rachum : The new __note__ feature for exception could be useful, but the documentation (and the section in "What's new") aren't good enough: "__note__: A mutable field which is :const:`None` by default and can be set to a string. If it is not :const:`None`, it is included in the traceback. This field can be used to enrich exceptions after they have been caught." This is more of a definition than an explanation. If this is solving a problem, there should be an explanation that starts from the problem being solved, hopefully with 2-3 examples where this is useful. If people start using this feature without some guidance, they might put things in the note that should have been in the message. -- assignee: docs@python components: Documentation messages: 407722 nosy: cool-RR, docs@python, iritkatriel priority: normal severity: normal status: open title: Exception notes need more documentation versions: Python 3.11 ___ Python tracker <https://bugs.python.org/issue45990> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue39212] Show qualified function name when giving arguments error
New submission from Ram Rachum : I recently got this familiar error: builtins.TypeError: __init__() takes 1 positional argument but 2 were given It was annoying that I didn't know which `__init__` method was under discussion. I wish that Python used the `__qualname__` of the function to show this error message (and maybe others?) so it'll show like this: builtins.TypeError: FooBar.__init__() takes 1 positional argument but 2 were given If I'm not mistaken, the implementation of this error is in getargs.c in the function vgetargs1_impl. -- components: Interpreter Core messages: 359302 nosy: cool-RR priority: normal severity: normal status: open title: Show qualified function name when giving arguments error type: enhancement versions: Python 3.9 ___ Python tracker <https://bugs.python.org/issue39212> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue39212] Show qualified function name when giving arguments error
Ram Rachum added the comment: Here is a short IPython session: In [1]: class Foo: ...: def __init__(self, x): ...: pass ...: In [2]: Foo(7, 8) --- TypeError Traceback (most recent call last) in > 1 Foo(7, 8) TypeError: __init__() takes 2 positional arguments but 3 were given As you can see, it's pretty simple to get this exception text, so I'm not sure why you didn't get that text. This is on Python 3.8.1. Regarding you saying it's more annoying than useful: Especially for methods such as `__init__`, it's often difficult to understand which class is being instantiated, especially in a complex codebase. It happened to me last week at work, and even with a debugger and being an experienced Python developer, it took me a few minutes to figure out which `__init__` method was being called. -- ___ Python tracker <https://bugs.python.org/issue39212> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue39212] Show qualified function name when giving arguments error
Ram Rachum added the comment: > But I *did* get that text. I'm asking how you got the *different* text > which you gave in your initial request. Oh, right. Looking back, turns out Wing IDE did that for me. Didn't notice, sorry. > So in my opinion, and I recognise that you may disagree, this is only of > benefit in a minority of cases. For the majority of cases, it will only > be additional noise in the message that adds nothing that wasn't already > obvious from the source line. I understand your perspective. One correction though regarding adding noise to the error. You gave this example: builtins.TypeError: package.some_module.MyClass.__init__ takes 1 positional argument but 2 were given While actually it'll be: TypeError: MyClass.__init__ takes 1 positional argument but 2 were given Since __qualname__ only includes the class, not its module. So it's quite a bit shorter. -- ___ Python tracker <https://bugs.python.org/issue39212> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue39279] Don't allow non-Ascii digits in platform.py
New submission from Ram Rachum : The platform.py module takes non-Ascii digits in regexes in places it shouldn't. e.g. digits like ٢ and ５ and accepted, when only the Ascii digits between 0-9 should be accepted. -- components: Library (Lib) messages: 359694 nosy: cool-RR priority: normal severity: normal status: open title: Don't allow non-Ascii digits in platform.py type: behavior versions: Python 3.9 ___ Python tracker <https://bugs.python.org/issue39279> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
