[issue33081] multiprocessing Queue leaks a file descriptor associated with the pipe writer
Yongzhi Pan added the comment:
On macOS with Python 3.7.2, using pitrou's code, I suspect Python does not
delete some semaphores used by Queue.
Run these:
import multiprocessing
import os
import threading
os.system('lsof -p {} | grep -v txt'.format(os.getpid()))
q = multiprocessing.Queue()
q.put(1)
q.get()
threading.enumerate()
os.system('lsof -p {} | grep -v txt'.format(os.getpid()))
q.close()
threading.enumerate()
os.system('lsof -p {} | grep -v txt'.format(os.getpid()))
I see:
>>> import multiprocessing
>>> import os
>>> import threading
>>>
>>> os.system('lsof -p {} | grep -v txt'.format(os.getpid()))
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
Python 56029 tux cwdDIR1,496 1927156 /Users/tux/Desktop
Python 56029 tux0u CHR 16,2 0t2867183 2393 /dev/ttys002
Python 56029 tux1u CHR 16,2 0t2867183 2393 /dev/ttys002
Python 56029 tux2u CHR 16,2 0t2867183 2393 /dev/ttys002
0
>>> q = multiprocessing.Queue()
>>> q.put(1)
>>> q.get()
1
>>> threading.enumerate()
[<_MainThread(MainThread, started 4570830272)>, ]
>>> os.system('lsof -p {} | grep -v txt'.format(os.getpid()))
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
Python 56029 tux cwd DIR1,496 1927156
/Users/tux/Desktop
Python 56029 tux0u CHR 16,2 0t2867914 2393
/dev/ttys002
Python 56029 tux1u CHR 16,2 0t2867914 2393
/dev/ttys002
Python 56029 tux2u CHR 16,2 0t2867914 2393
/dev/ttys002
Python 56029 tux3 PIPE 0x5ab56e2f13ca4abb 16384
->0x5ab56e2f13ca5a7b
Python 56029 tux4 PIPE 0x5ab56e2f13ca5a7b 16384
->0x5ab56e2f13ca4abb
Python 56029 tux5r PSXSEM 0t0
/mp-oa1x27kb
Python 56029 tux6r PSXSEM 0t0
/mp-khu1swie
Python 56029 tux7r PSXSEM 0t0
/mp-pwrgzmzz
0
>>> q.close()
>>> threading.enumerate()
[<_MainThread(MainThread, started 4570830272)>]
>>> os.system('lsof -p {} | grep -v txt'.format(os.getpid()))
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
Python 56029 tux cwd DIR1,496 1927156 /Users/tux/Desktop
Python 56029 tux0u CHR 16,2 0t2869010 2393 /dev/ttys002
Python 56029 tux1u CHR 16,2 0t2869010 2393 /dev/ttys002
Python 56029 tux2u CHR 16,2 0t2869010 2393 /dev/ttys002
Python 56029 tux5r PSXSEM 0t0 /mp-oa1x27kb
Python 56029 tux6r PSXSEM 0t0 /mp-khu1swie
Python 56029 tux7r PSXSEM 0t0 /mp-pwrgzmzz
The three PSXSEM persists even after some time. Is this some type of leakage?
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[issue33081] multiprocessing Queue leaks a file descriptor associated with the pipe writer
Change by Yongzhi Pan : -- nosy: +fossilet ___ Python tracker <https://bugs.python.org/issue33081> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18018] SystemError: Parent module '' not loaded, cannot perform relative import
Changes by Yongzhi Pan <panyong...@gmail.com>: -- nosy: +fossilet ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue18018> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24752] SystemError when importing from a non-package directory
New submission from Yongzhi Pan: In an empty dir, e.g. Desktop, the following import raises SystemError: from . import foo Traceback (most recent call last): File stdin, line 1, in module SystemError: Parent module '' not loaded, cannot perform relative import The documentation says that SystemError should be reported as a bug. -- components: Interpreter Core messages: 247653 nosy: fossilet priority: normal severity: normal status: open title: SystemError when importing from a non-package directory versions: Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24752 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23589] Redundant sentence in FAQ
Yongzhi Pan added the comment: Or: In Python, variables inside a function that are only referenced but not assigned are implicitly global.? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23589 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23589] Redundant sentence in FAQ
Yongzhi Pan added the comment: What about changing the first sentence to: In Python, variables that are only referenced but not assigned inside a function are implicitly global.? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23589 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23589] Redundant sentence in FAQ
New submission from Yongzhi Pan: In https://docs.python.org/3/faq/programming.html#what-are-the-rules-for-local-and-global-variables-in-python, two sentences of essentially the same meaning exist. I try to remove this redundancy. -- assignee: docs@python components: Documentation files: faq_fix.diff keywords: patch messages: 237248 nosy: docs@python, fossilet priority: normal severity: normal status: open title: Redundant sentence in FAQ type: enhancement versions: Python 3.2, Python 3.3, Python 3.4, Python 3.5, Python 3.6 Added file: http://bugs.python.org/file38339/faq_fix.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23589 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue14544] Limit global keyword name conflicts in language spec to those enforced by CPython
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[issue23589] Redundant sentence in FAQ
Yongzhi Pan added the comment: Updated diff as Raymond's wording. -- Added file: http://bugs.python.org/file38340/faq_fix_1.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23589 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue8350] Document lack of support for keyword arguments in C functions
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[issue22379] Empty exception message of str.join
Yongzhi Pan added the comment: Do the patches still have problems? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22379 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22379] Empty exception message of str.join
Yongzhi Pan added the comment:
I tested it and find str of an exception does not contain the exception type:
a = TypeError()
str(a)
''
a = TypeError('b', 3)
a.args
('b', 3)
str(a)
('b', 3)
Am I missing some other circumstances?
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[issue22379] Empty exception message of str.join
Yongzhi Pan added the comment: I have updated the test for 3.5. The related tests pass after the patching. Are they OK now? There are two caveats: I did not update test_bytes in 2.7, and I did not add checkraises in test_bytes in 3.5. -- Added file: http://bugs.python.org/file36621/test_for_35-1.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22379 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22379] Empty exception message of str.join
Changes by Yongzhi Pan fossi...@users.sourceforge.net: -- versions: +Python 3.5 Added file: http://bugs.python.org/file36604/str_join_exception_message_1.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22379 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22379] Empty exception message of str.join
Yongzhi Pan added the comment: I updated the patches. Since exceptions in 3 do not have a message attribute, I did not check them. Are they OK? -- Added file: http://bugs.python.org/file36605/test_for_35.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22379 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22379] Empty exception message of str.join
New submission from Yongzhi Pan: In the 2.7 branch, the exception message of str.join is missing when the argument is non-sequence: ' '.join(None) Traceback (most recent call last): File stdin, line 1, in module TypeError I fix this with a patch. After this: ' '.join(None) Traceback (most recent call last): File stdin, line 1, in module TypeError: can only join an iterable I also add test to this case. Can the test also be added to 3.x branches? -- components: ctypes files: str_join_exception_message.diff keywords: patch messages: 226675 nosy: fossilet priority: normal severity: normal status: open title: Empty exception message of str.join type: enhancement versions: Python 2.7 Added file: http://bugs.python.org/file36589/str_join_exception_message.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22379 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue14228] It is impossible to catch sigint on startup in python code
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[issue18885] handle EINTR in the stdlib
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[issue12634] Random Remarks in class documentation
Yongzhi Pan added the comment: It may be worth to noting that when creating property attribute using the property decorator, we may tend to name the method using nouns, like here: http://docs.python.org/2/library/functions.html#property This is when I once overided data attribute with method. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12634 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16438] Numeric operator predecence confusing
Yongzhi Pan added the comment: One possible solution: We do not list priorities of the operations, instead link to the precedence table in the language reference. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16438 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16470] Backport set and dictionary comprehensions in tutorial to 2.7
Yongzhi Pan added the comment: I updated the patch according to the code review. Hope now it is OK. -- Added file: http://bugs.python.org/file27995/set_and_dict_comprehensions_1.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16470 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue2333] Backport set and dict comprehensions
Yongzhi Pan added the comment:
I think metal means that the different ways set is repr'd in 2.7 and 3.
In 2.7:
In [9]: a = {x for x in 'abracadabra' if x not in 'abc'}
In [10]: repr(a)
Out[10]: set(['r', 'd'])
In 3.2：
In [6]: a = {x for x in 'abracadabra' if x not in 'abc'}
In [7]: repr(a)
Out[7]: {'r', 'd'}
We were saying not changing __repr__ in #2335.
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[issue2333] Backport set and dict comprehensions
Yongzhi Pan added the comment: Great they are backported to 2.7. Dictionary and set comprehensions are not documented in the tutorial of 2.7, though they are in the language reference. Is it OK to add these to the tutorial? I've uploaded a patch. -- nosy: +fossilet Added file: http://bugs.python.org/file27981/set_and_dict_comprehensions.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue2333 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16470] Backport set and dictionary comprehensions in tutorial to 2.7
New submission from Yongzhi Pan: Dictionary and set comprehensions are backported to 2.7 in issue #2333. The are not documented in the tutorial of 2.7, though they are in the language reference. Is it OK to add these to the tutorial? I've uploaded a patch. -- assignee: docs@python components: Documentation files: set_and_dict_comprehensions.diff keywords: patch messages: 175547 nosy: docs@python, fossilet priority: normal severity: normal status: open title: Backport set and dictionary comprehensions in tutorial to 2.7 type: enhancement versions: Python 2.7 Added file: http://bugs.python.org/file27982/set_and_dict_comprehensions.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16470 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16435] Python 3 doc link to Python 2 FAQ
New submission from Yongzhi Pan: http://docs.python.org/3/tutorial/whatnow.html The last paragraph links to http://www.python.org/doc/faq/, which defaults to Python 2 FAQ. -- assignee: docs@python components: Documentation messages: 175156 nosy: docs@python, fossilet priority: normal severity: normal status: open title: Python 3 doc link to Python 2 FAQ versions: Python 3.2, Python 3.3 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16435 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16436] Missing anchor in doc
New submission from Yongzhi Pan: http://docs.python.org/3/library/functions.html#func-frozenset http://docs.python.org/3/library/functions.html#func-set frozenset and set function have no links to their definitions. Also the anchor name is prefixed with func, which is different to other builtin functions. -- assignee: docs@python components: Documentation messages: 175157 nosy: docs@python, fossilet priority: normal severity: normal status: open title: Missing anchor in doc versions: Python 3.3, Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16436 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16437] issubclass doc improvement
New submission from Yongzhi Pan: http://docs.python.org/3/library/functions.html#issubclass classinfo may be a tuple of class objects. I suggest make it clear like isinstance, use something like this: classinfo may be a tuple of class objects and such tuples. -- assignee: docs@python components: Documentation messages: 175158 nosy: docs@python, fossilet priority: normal severity: normal status: open title: issubclass doc improvement versions: Python 3.3, Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16437 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16438] Numeric operator predecence confusing
New submission from Yongzhi Pan: http://docs.python.org/3/library/stdtypes.html#numeric-types-int-float-complex All numeric types (except complex) support the following operations, sorted by ascending priority. It list '-' after '+', '/' after '*'. That is to mean '-' has higher precedence than '+'. That is wrong, and is contradicting with here: http://docs.python.org/3/reference/expressions.html#summary This should be made clear. -- assignee: docs@python components: Documentation messages: 175163 nosy: docs@python, fossilet priority: normal severity: normal status: open title: Numeric operator predecence confusing versions: Python 2.7, Python 3.2, Python 3.3, Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16438 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16439] Code not collapsed correctly
New submission from Yongzhi Pan: http://docs.python.org/3/library/stdtypes.html#str.title The second snippets is not collapsed correctly. -- assignee: docs@python components: Documentation messages: 175171 nosy: docs@python, fossilet priority: normal severity: normal status: open title: Code not collapsed correctly versions: Python 2.7, Python 3.2, Python 3.3, Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16439 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16438] Numeric operator predecence confusing
Yongzhi Pan added the comment: I mean the text at the first link need fix. '+' and '-' are not on the same row. And the doc says: sorted by ascending priority, that means they have ascending priority. The table in the reference is just right. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16438 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16440] Exception type
New submission from Yongzhi Pan: http://docs.python.org/3/library/stdtypes.html#methods Attempting to set a method attribute results in a TypeError being raised. But in the example, if we do c.method.whoami = 'c', we get AttributeError instead of TypeError. -- assignee: docs@python components: Documentation messages: 175174 nosy: docs@python, fossilet priority: normal severity: normal status: open title: Exception type versions: Python 2.7, Python 3.2, Python 3.3, Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16440 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12634] Random Remarks in class documentation
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[issue16048] Tutorial-classes-remarks: replace paragraph
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[issue6829] Frendly error message when inheriting from function
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[issue16294] 8 space indent in tutorial
New submission from Yongzhi Pan: http://docs.python.org/py3k/tutorial/stdlib2.html#weak-references In the code example, the two class funtions' bodies have indents of 8 spaces. All other indents in the docs are 4 spaces. I suggest here we use 4 spaces also. -- assignee: docs@python components: Documentation messages: 173443 nosy: docs@python, fossilet priority: normal severity: normal status: open title: 8 space indent in tutorial type: enhancement versions: Python 2.7, Python 3.1, Python 3.2, Python 3.3 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16294 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16265] Code sample does not collapse correctly
New submission from Yongzhi Pan:
http://docs.python.org/py3k/tutorial/inputoutput.html#fancier-output-formatting
In the last but second code sample in that section, the code is not correctly
colored and cannot be correctly collapsed.
Expanded:
table = {'Sjoerd': 4127, 'Jack': 4098, 'Dcab': 8637678}
print ('Jack: {0[Jack]:d}; Sjoerd: {0[Sjoerd]:d}; '
...'Dcab: {0[Dcab]:d}'.format(table))
Jack: 4098; Sjoerd: 4127; Dcab: 8637678
Collapsed:
table = {'Sjoerd': 4127, 'Jack': 4098, 'Dcab': 8637678}
print('Jack: {0[Jack]:d}; Sjoerd: {0[Sjoerd]:d}; '
--
assignee: docs@python
components: Documentation
messages: 173163
nosy: docs@python, fossilet
priority: normal
severity: normal
status: open
title: Code sample does not collapse correctly
type: behavior
versions: Python 3.2, Python 3.3
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[issue16266] Typo in tutorial
New submission from Yongzhi Pan: http://docs.python.org/py3k/tutorial/inputoutput.html#reading-and-writing-files The text: In text mode, the default is to convert platform-specific line endings (\n on Unix, \r\n on Windows) to just \n on reading and \n back to platform-specific line endings on writing. Is the last '\n' a typo and not needed? -- assignee: docs@python components: Documentation messages: 173165 nosy: docs@python, fossilet priority: normal severity: normal status: open title: Typo in tutorial type: behavior versions: Python 3.2, Python 3.3 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16266 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue4749] Issue with RotatingFileHandler logging handler on Windows
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[issue15342] os.path.join behavior
Yongzhi Pan fossi...@users.sourceforge.net added the comment:
I suggest append An empty last part will result in a path that ends with a
separator or something similar to the docstring, though it is already in the
HTML documentation.
Suppose someone does this like me:
In [10]: join('a', sep)
Out[10]: '/'
He must be surprised. He has to guess how to append a separator if he does not
look at the code, or fiddle around until he finds the soultion.
Given it explained in the docstring, after he sees:
In [10]: join('a', sep)
Out[10]: '/'
He will probably look at the docstring:
In [16]: join?
Type: function
Base Class: type 'function'
String Form:function join at 0x7f053fc93ed8
Namespace: Interactive
File: /usr/lib/python2.7/posixpath.py
Definition: join(a, *p)
Docstring:
Join two or more pathname components, inserting '/' as needed.
If any component is an absolute path, all previous path components
will be discarded. An empty last part will result in a path that
ends with a separator.
Ok, he immediately knows he has to supply an empty string instead of a
separator.
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