[issue35889] sqlite3.Row doesn't have useful repr
Vlad Shcherbina added the comment: 1. "This patch adds too many lines of code and not enough value." If the maintainers judge it so, I have nothing to say. You have the responsibility to keep the codebase relatively simple. 2a. "Existing programs made with the assumption that repr(row) is short (albeit useless) will break when it becomes not so short." I have no experience maintaining popular language implementations, so I defer to your judgement on what level of backward compatibility is warranted. 2b. "New users of new repr(row) will run into problems because its size is unbounded." I think this objection is invalid, as I explained in the comment: https://bugs.python.org/issue35889#msg336291 -- ___ Python tracker <https://bugs.python.org/issue35889> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue37204] Scripts and binaries in PYTHON_PREFIX/Scripts contain unnecessarily lowercased path to Python location on Windows
Vlad Shcherbina added the comment: https://github.com/pypa/pip/issues/6582 -- ___ Python tracker <https://bugs.python.org/issue37204> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue37204] Scripts and binaries in PYTHON_PREFIX/Scripts contain unnecessarily lowercased path to Python location on Windows
New submission from Vlad Shcherbina : To reproduce: 1. Download and run Python installer (I used python-3.7.3-amd64-webinstall.exe). 2. Modify install settings: - Install for all users: yes - Customize install location: "C:\Python37" (don't know if it's relevant, mentioning it just in case) 3. Install. 4. Run the following commands: pip --version py -m pip --version Expected result: > pip --version pip 19.0.3 from C:\Python37\lib\site-packages\pip (python 3.7) > py -m pip --version pip 19.0.3 from C:\Python37\lib\site-packages\pip (python 3.7) Actual result: > pip --version pip 19.0.3 from c:\python37\lib\site-packages\pip (python 3.7) > py -m pip --version pip 19.0.3 from C:\Python37\lib\site-packages\pip (python 3.7) Same happens for all binaries and scripts in PYTHON_PREFIX/Scripts, not only for pip.exe. For example, if I install pytest (using "pip install pytest" or "py -m pip install pytest", doesn't matter), I get the following: > pytest -v test session starts platform win32 -- Python 3.7.3, pytest-4.6.2, py-1.8.0, pluggy-0.12.0 -- c:\python37\python.exe cachedir: .pytest_cache rootdir: C:\temp\qqq collected 0 items === no tests ran in 0.02 seconds > py -m pytest -v test session starts platform win32 -- Python 3.7.3, pytest-4.6.2, py-1.8.0, pluggy-0.12.0 -- C:\Python37\python.exe cachedir: .pytest_cache rootdir: C:\temp\qqq collected 0 items === no tests ran in 0.02 seconds -- components: Distutils, Installation, Windows messages: 345037 nosy: dstufft, eric.araujo, paul.moore, steve.dower, tim.golden, vlad, zach.ware priority: normal severity: normal status: open title: Scripts and binaries in PYTHON_PREFIX/Scripts contain unnecessarily lowercased path to Python location on Windows type: behavior versions: Python 2.7, Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9 ___ Python tracker <https://bugs.python.org/issue37204> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue34776] Postponed annotations break inspection of dataclasses
Vlad Shcherbina added the comment: Any chance this could get into 3.7.3? -- nosy: +vlad ___ Python tracker <https://bugs.python.org/issue34776> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue35889] sqlite3.Row doesn't have useful repr
Vlad Shcherbina added the comment: There is no need to add explicit knowledge of reprlib to the Row object or vice versa. Those who use reprlib to limit output size will have no problem. Reprlib already truncates arbitrary reprs at the string level: https://github.com/python/cpython/blob/22bfe637ca7728e9f74d4dc8bb7a15ee2a913815/Lib/reprlib.py#L144 Those who use builtin repr() have to be prepared for the possibility of unbounded repr anyway, because all collection-like objects in Python have unbounded __repr__. It would be annoying if some collection-like objects decided to be clever and omit parts of their regular __repr__ because they feel it's too much for the user to handle. -- ___ Python tracker <https://bugs.python.org/issue35889> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue35889] sqlite3.Row doesn't have useful repr
New submission from Vlad Shcherbina :
To reproduce, run the following program:
import sqlite3
conn = sqlite3.connect(':memory:')
conn.row_factory = sqlite3.Row
print(conn.execute("SELECT 'John' AS name, 42 AS salary").fetchone())
It prints ''.
It would be nice if it printed something like "sqlite3.Row(name='Smith',
saraly=42)" instead.
It wouldn't satisfy the 'eval(repr(x)) == x' property, but it's still better
than nothing.
If the maintainers agree this is useful, I'll implement.
--
components: Library (Lib)
messages: 334746
nosy: vlad
priority: normal
severity: normal
status: open
title: sqlite3.Row doesn't have useful repr
type: enhancement
versions: Python 2.7, Python 3.4, Python 3.5, Python 3.6, Python 3.7, Python 3.8
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[issue33075] typing.NamedTuple does not deduce Optional[] from using None as default field value
Vlad Shcherbina <vlad.shcherb...@gmail.com> added the comment: If the maintainers agree that it's desirable to automatically deduce optionality, I'll implement it. -- ___ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue33075> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue33075] typing.NamedTuple does not deduce Optional[] from using None as default field value
New submission from Vlad Shcherbina <vlad.shcherb...@gmail.com>:
from typing import *
def f(arg: str = None):
pass
print(get_type_hints(f))
# {'arg': typing.Union[str, NoneType]}
# as expected
class T(NamedTuple):
field: str = None
print(get_type_hints(T))
# {'field': }
# but it should be
# {'field': typing.Union[str, NoneType]}
# for consistency
--
components: Library (Lib)
messages: 313819
nosy: vlad
priority: normal
severity: normal
status: open
title: typing.NamedTuple does not deduce Optional[] from using None as default
field value
type: behavior
versions: Python 3.6, Python 3.7
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[issue31239] namedtuple comparison ignores types
Vlad Shcherbina added the comment: While we are at it, namedtuple inherits other operations that make no sense for fixed-length tuples: >>> Rectangle(width=1, height=2) * 3 (1, 2, 1, 2, 1, 2) >>> Rectangle(width=1, height=2) + Ellipse(x_axis=3, y_axis=4) (1, 2, 3, 4) But those are not so problematic because they are less likely to occur in practice. -- ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue31239> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue31239] namedtuple comparison ignores types
New submission from Vlad Shcherbina:
Toy example:
>>> from collections import namedtuple
>>> Rectangle = namedtuple('Rectangle', 'width height')
>>> Ellipse = namedtuple('Ellipse', 'x_axis y_axis')
>>> Rectangle(width=1, height=2) == Ellipse(x_axis=1, y_axis=2)
True
I understand this happens because namedtuple inherits comparisons and hash from
the regular tuple.
However, this seems like confusing and dangerous behavior.
It is especially annoying to debug when these tuples are used as dict keys
(repr() shows one thing and dict item access shows another).
Why would anyone mix named tuples of different types?
Here is a use case: typing.NamedTuple together with typing.Union would be a
neat way to express algebraic data types.
Haskell's
data Shape = Rectangle Int Int | Ellipse Int Intderiving(Eq, Show)
would become
Shape = Union[Rectangle, Ellipse]
except that it does not work as expected because of the flawed comparisons.
--
components: Library (Lib)
messages: 300562
nosy: vlad
priority: normal
severity: normal
status: open
title: namedtuple comparison ignores types
type: behavior
versions: Python 2.7, Python 3.3, Python 3.4, Python 3.5, Python 3.6, Python 3.7
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[issue18945] Name collision handling in tempfile is not covered by tests
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Added file: http://bugs.python.org/file31739/tempfile_collision_tests_27 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18945 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18945] Name collision handling in tempfile is not covered by tests
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Added file: http://bugs.python.org/file31730/tempfile_collision_tests.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18945 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18945] Name collision handling in tempfile is not covered by tests
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Removed file: http://bugs.python.org/file31697/tempfile_collision_tests.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18945 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18945] Name collision handling in tempfile is not covered by tests
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: -- keywords: +patch Added file: http://bugs.python.org/file31697/tempfile_collision_tests.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18945 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18945] Name collision handling in tempfile is not covered by tests
Vlad Shcherbina added the comment: Probably yes, I'm just not sure when I'll get the time. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18945 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18945] Name collision handling in tempfile is not covered by tests
New submission from Vlad Shcherbina: I intend to add test for (existing dir)-(new file) collision in http://bugs.python.org/issue18849, but file-file, file-dir and dir-dir collisions are yet to be covered. -- components: Tests messages: 197062 nosy: vlad priority: normal severity: normal status: open title: Name collision handling in tempfile is not covered by tests type: enhancement versions: Python 2.7, Python 3.3, Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18945 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Removed file: http://bugs.python.org/file31580/temp_dir_exists_retry_test_27.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Removed file: http://bugs.python.org/file31573/temp_dir_exists_retry_27.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Removed file: http://bugs.python.org/file31574/temp_dir_exists_retry_33_34.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Removed file: http://bugs.python.org/file31579/temp_dir_exists_retry_test_33_34.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Added file: http://bugs.python.org/file31601/temp_dir_exists_retry_test_33_34.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Added file: http://bugs.python.org/file31605/temp_dir_exists_retry_27.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Added file: http://bugs.python.org/file31604/temp_dir_exists_retry_test_27.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Added file: http://bugs.python.org/file31602/temp_dir_exists_retry_33_34.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Removed file: http://bugs.python.org/file31604/temp_dir_exists_retry_test_27.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Removed file: http://bugs.python.org/file31605/temp_dir_exists_retry_27.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Removed file: http://bugs.python.org/file31601/temp_dir_exists_retry_test_33_34.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Removed file: http://bugs.python.org/file31602/temp_dir_exists_retry_33_34.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Added file: http://bugs.python.org/file31607/temp_dir_exists_retry_33_34.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Added file: http://bugs.python.org/file31606/temp_dir_exists_retry_test_33_34.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Added file: http://bugs.python.org/file31608/temp_dir_exists_retry_test_27.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Added file: http://bugs.python.org/file31609/temp_dir_exists_retry_27.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Added file: http://bugs.python.org/file31579/temp_dir_exists_retry_test_33_34.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Added file: http://bugs.python.org/file31580/temp_dir_exists_retry_test_27.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Vlad Shcherbina added the comment: 1. I agree that consistency between 2.7 and 3.* have some value, but maybe it's better to take less permissive approach in 3.* instead and only retry when exception is PermissionError _and_ errno is EACCES? 2. Currently it's being reraised unless platform.name == 'nt'. Also, I added a test, so if there are problems on other platforms, they will surface (I myself only tried it on linux and windows 7 though). -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Removed file: http://bugs.python.org/file31518/fix_for_27.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Added file: http://bugs.python.org/file31573/temp_dir_exists_retry_27.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: Added file: http://bugs.python.org/file31574/temp_dir_exists_retry_33_34.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
Changes by Vlad Shcherbina vlad.shcherb...@gmail.com: -- keywords: +patch Added file: http://bugs.python.org/file31518/fix_for_27.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue18849] Failure to try another name for tempfile when directory with chosen name exists on windows
New submission from Vlad Shcherbina: When directory exists with a name chosen for new temporary file, OSError with EACCESS errno is thrown on windows, while attempts to chose another name only happen on EEXIST errors. To reproduce, run --- 8 - import sys import tempfile import os print sys.platform print sys.version # Mock random names to ensure collision. tempfile._RandomNameSequence = lambda: iter(['a', 'a', 'b']) d = tempfile.mkdtemp() print d try: print tempfile.NamedTemporaryFile().name finally: os.rmdir(d) --- 8 - Expected result: win32 2.7.3 (default, Apr 10 2012, 23:24:47) [MSC v.1500 64 bit (AMD64)] ...\tmpa ...\tmpb Actual result: win32 2.7.3 (default, Apr 10 2012, 23:24:47) [MSC v.1500 64 bit (AMD64)] c:\users\shcher~1\appdata\local\temp\tmpa Traceback (most recent call last): File hz.py, line 13, in module print tempfile.NamedTemporaryFile().name File C:\python_27_amd64\files\lib\tempfile.py, line 454, in NamedTemporaryFile (fd, name) = _mkstemp_inner(dir, prefix, suffix, flags) File C:\python_27_amd64\files\lib\tempfile.py, line 235, in _mkstemp_inner fd = _os.open(file, flags, 0600) OSError: [Errno 13] Permission denied: 'c:\\users\\shcher~1\\appdata\\local\\temp\\tmpa' -- components: Library (Lib), Windows messages: 196269 nosy: Vlad.Shcherbina priority: normal severity: normal status: open title: Failure to try another name for tempfile when directory with chosen name exists on windows type: behavior ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue18849 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
