[Python-Dev] Re: NamedTemporaryFile and context managers

2021-04-09 Thread Serhiy Storchaka 
08.04.21 23:31, Ethan Furman пише:
> In issue14243 [1] there are two issues being tracked:
> 
> - the difference in opening shared files between posix and Windows
> - the behavior of closing the underlying file in the middle of
>   NamedTemporaryFile's context management
> 
> I'd like to address and get feedback on the context management issue.
> 
> ```python
> from tempfile import NamedTemporaryFile
> 
> with NamedTemporaryFile() as fp:
>     fp.write(b'some data')
>     fp = open(fp.name())
>     data = fp.read()
> 
> assert data == 'some_data'
> ```


These issues are usually solved by using TemporaryDirectory:

with TemporaryDirectory() as td:
filename = os.path.join(td, 'tempfile')
with open(filename, 'wb') as fp:
fp.write(b'some data')
with open(filename, 'rb') as fp:
data = fp.read()

What if make NamedTemporaryFile a wrapper around TemporaryDirectory and
always create a new temporary directory for file?

@contextmanager
def NamedTemporaryFile():
with TemporaryDirectory() as td:
filename = os.path.join(td, 'tempfile')
with open(filename, 'wb') as fp:
yield fp

___
Python-Dev mailing list -- python-dev@python.org
To unsubscribe send an email to python-dev-le...@python.org
https://mail.python.org/mailman3/lists/python-dev.python.org/
Message archived at 
https://mail.python.org/archives/list/python-dev@python.org/message/2H2PIMPZ3VE2JDBUA7WVX25ULIC3C4SM/
Code of Conduct: http://python.org/psf/codeofconduct/

[Python-Dev] Summary of Python tracker Issues

2021-04-09 Thread Python tracker 


ACTIVITY SUMMARY (2021-04-02 - 2021-04-09)
Python tracker at https://bugs.python.org/

To view or respond to any of the issues listed below, click on the issue.
Do NOT respond to this message.

Issues counts and deltas:
  open7524 (+19)
  closed 48008 (+70)
  total  55532 (+89)

Open issues with patches: 2999 


Issues opened (60)
==

#24160: Pdb sometimes raises exception when trying to remove a breakpo
https://bugs.python.org/issue24160  reopened by pablogsal

#39899: `pathlib.Path.expanduser()` does not call `os.path.expanduser(
https://bugs.python.org/issue39899  reopened by steve.dower

#43708: Tkinter theme settings object schema is missing
https://bugs.python.org/issue43708  opened by WHK102

#43712: PEP 597: fileinput uses locale encoding
https://bugs.python.org/issue43712  opened by methane

#43714: re.split(), re.sub(): '\Z' must consume end of string if it ma
https://bugs.python.org/issue43714  opened by alegrigoriev

#43715: curses inch() and scrbkgd() documentation ommissions
https://bugs.python.org/issue43715  opened by pjfarleyiii

#43717: Confusing OSError on HTTP CONNECT failure
https://bugs.python.org/issue43717  opened by michael-o

#43718: HTTP CONNECT response not subject to debug level
https://bugs.python.org/issue43718  opened by michael-o

#43721: Documentation of property.{getter,setter,deleter} fails to men
https://bugs.python.org/issue43721  opened by Antony.Lee

#43722: PEP 597: FileCookieJar uses locale encoding
https://bugs.python.org/issue43722  opened by methane

#43723: Deprecate camelCase aliases from threading.py
https://bugs.python.org/issue43723  opened by Jelle Zijlstra

#43725: Create a release branch ABI stability regression test
https://bugs.python.org/issue43725  opened by gregory.p.smith

#43727: futures cancelled by ThreadPoolExecutor.shutdown() not yielded
https://bugs.python.org/issue43727  opened by bigbenhur

#43731: PEP 597: logging.fileConfig() uses locale encoding.
https://bugs.python.org/issue43731  opened by methane

#43732: PEP 597: mailcap uses locale encoding
https://bugs.python.org/issue43732  opened by methane

#43733: PEP 597: netrc uses locale encoding.
https://bugs.python.org/issue43733  opened by methane

#43735: PEP 597: os.popen() and pipes uses locale encoding
https://bugs.python.org/issue43735  opened by methane

#43737: Documentation of modulo operator should document behaviour cle
https://bugs.python.org/issue43737  opened by anthony-flury

#43738: Clarify public name of curses.window
https://bugs.python.org/issue43738  opened by rmccampbell7

#43739: Fixing the example code in Doc/extending/extending.rst to decl
https://bugs.python.org/issue43739  opened by shreyanavigyan

#43740: Long paths in imp.load_dynamic()  lead to segfault
https://bugs.python.org/issue43740  opened by xxm

#43741: http.client leaks from self.fp.read()
https://bugs.python.org/issue43741  opened by HynekPetrak

#43742: tcp_echo_client in asyncio streams example does not work. Hang
https://bugs.python.org/issue43742  opened by jcolo

#43743: BlockingIOError: [Errno 11] Resource temporarily unavailable: 
https://bugs.python.org/issue43743  opened by p.conesa.mingo

#43744: enum: Adding a member named _classname__ raises IndexError
https://bugs.python.org/issue43744  opened by smurfix

#43749: venv module does not copy the correct python exe
https://bugs.python.org/issue43749  opened by Ian Norton

#43750: Undefined constant PACKET_MULTIHOST referred to in package soc
https://bugs.python.org/issue43750  opened by Tom Cook

#43751: await anext() returns None when default is given
https://bugs.python.org/issue43751  opened by pewscorner

#43752: [sqlite3] Fetching an empty value from date column raises Valu
https://bugs.python.org/issue43752  opened by felixxm

#43753: [C API] Add Py_Is(x, y) and Py_IsNone(x) functions
https://bugs.python.org/issue43753  opened by vstinner

#43754: Eliminate bindings for partial pattern matches
https://bugs.python.org/issue43754  opened by brandtbucher

#43756: About updating audit events when function gains new arguments
https://bugs.python.org/issue43756  opened by gousaiyang

#43757: pathlib: move 'resolve()' logic out of path flavour
https://bugs.python.org/issue43757  opened by barneygale

#43758: dict.config TimedRotatingFileHandler filename .suffix does not
https://bugs.python.org/issue43758  opened by tea940314

#43760: The DISPATCH() macro is not as efficient as it could be.
https://bugs.python.org/issue43760  opened by Mark.Shannon

#43761: Documenting dataclass and namedtuple changes for structural pa
https://bugs.python.org/issue43761  opened by freundTech

#43762: Add audit events for loading of sqlite3 extensions
https://bugs.python.org/issue43762  opened by erlendaasland

#43763: [sqlite3] Use SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION iso. sqlit
https://bugs.python.org/issue43763  opened by erlendaasland

#43766: Implement PEP 647 (User-Defined Type Guards) in typing.py
https://bugs.python.org/issue43766

[Python-Dev] Re: Python Core Mentorship program

2021-04-09 Thread Sheila Bishop 
Thanks
___
Python-Dev mailing list -- python-dev@python.org
To unsubscribe send an email to python-dev-le...@python.org
https://mail.python.org/mailman3/lists/python-dev.python.org/
Message archived at 
https://mail.python.org/archives/list/python-dev@python.org/message/IZNMWR6KO5CQUXA6H6HU4HHTP3WVIRH4/
Code of Conduct: http://python.org/psf/codeofconduct/