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...close() self.document = None def close(self): if self.index: self.index.close() if self.document: self.document.close() to be used as: all_lines = AllLines("index.txt") try: for line in all_lines: ... finally: all_lines.close() The more convoluted solution implementing timely release, seems to offer a precious hint. What we have done is encapsulate our traversal in an object (iterator) with a close method. This PEP pr...
...close-on-exec flag. Note OpenBSD older 5.2 does not close the file descriptor with close-on-exec flag set if fork() is used before exec(), but it works correctly if exec() is called without fork(). Try openbsd_bug.py. Scope Applications still have to close explicitly file descriptors after a fork(). The close-on-exec flag only closes file descriptors after exec(), and so after fork() + exec(). This PEP only change the close-on-exec flag of file descriptors created by the Python standard lib...
...close() call. Resolution: This usage of close() and GeneratorExit would be incompatible with their current role as a bail-out and clean-up mechanism. It would require that when closing a delegating generator, after the subgenerator is closed, the delegating generator be resumed instead of re-raising GeneratorExit. But this is not acceptable, because it would fail to ensure that the delegating generator is finalised properly in the case where close() is being called for cleanup purposes. Signal...
...close-on-exec flag on file descriptors to automatically close a file descriptor when the C function execv() is called. File descriptors with the close-on-exec flag cleared are inherited in the child process, file descriptors with the flag set are closed in the child process. The flag can be set in two syscalls (one to get current flags, a second to set new flags) using fcntl(): int flags, res; flags = fcntl(fd, F_GETFD); if (flags == -1) { /* handle the error */ } flags |= FD_CLOEXEC; /* or "fl...
...close(a,b) is always the same as isclose(b,a) If a relative closeness test uses only one of the values (such as (1) above), then the result is asymmetric, i.e. isclose(a,b) is not necessarily the same as isclose(b,a). Which approach is most appropriate depends on what question is being asked. If the question is: "are these two numbers close to each other?", there is no obvious ordering, and a symmetric test is most appropriate. However, if the question is: "Is the computed value within x% of thi...
...closed) or GeneratorExit (by not catching the exception), close() returns to its caller. If the generator yields a value, a RuntimeError is raised. If the generator raises any other exception, it is propagated to the caller. close() does nothing if the generator has already exited due to an exception or normal exit. Add support to ensure that close() is called when a generator iterator is garbage-collected. Allow yield to be used in try/finally blocks, since garbage collection or an explicit c...
...close__ as specified above. If the future is not enabled, then for loops and * unpacking do not call __iterclose__. But they do call some other method instead, e.g. __iterclose_warning__. Similarly, functions like list use stack introspection (!!) to check whether their direct caller has __future__.iterclose enabled, and use this to decide whether to call __iterclose__ or __iterclose_warning__. For all the wrapper iterators, we also add __iterclose_warning__ methods that forward to the __iterclo...
...closed for the Travel Grant Committee PyCon Charlas Committee La Python Software Foundation y el Staff de la PyCon promueve y aprecia la participación de voluntaries. Nuestra misión en apoyar y facilitar el crecimiento de una comunidad diversa e internacional y esto requiere la participación de la comunidad en si misma. El voluntariado para los comítes de la PyCon US son una forma de involucrarse y hacer la diferencia. Si te gustaría unirte al comíte de PyCon Charlas `por favor llena este formul...
...close calls). Register the close method to be called during Python's exit processing. When the function returns, the running program is a daemon process. close() Return:None Close the daemon context. This performs the following steps: If this instance's is_open property is false, return immediately. This makes it safe to call close multiple times on an instance. If the pidfile attribute is not None, exit its context manager. Mark this instance as closed (for the purpose of future ope...
...closely intertwined with the Distutils and other packaging tools, the Catalog-SIG was closed in March 2013 and merged with the Distutils SIG. SIG Links Requirements document Other packaging systems Subscribing to the mailing list Archives Current Status As of February 2003, the Python Package Index is operational and available at http://pypi.python.org/pypi. The list of indexed packages is still quite small; please add your packages! Some relevant PEPs have been w...
...close the bug. If you fix a bug, mark the status as "Fixed" and close it. In the comments, include the SVN revision numbers of the commit(s). In the SVN checkin message, include the issue number and a normal description of the change, mentioning the contributor if a patch was applied. If you are assigned a bug that you are unable to deal with, assign it to someone else if you think they will be able to deal with it, otherwise it's probably best to unassign it. References [1]http://bugs...
...close, close() methods and os.dup2() are a special case: they will ignore EINTR instead of retrying. The reason is complex but involves behaviour under Linux and the fact that the file descriptor may really be closed even if EINTR is returned. See articles: Returning EINTR from close() (LKML) Re: [patch 7/7] uml: retry host close() on EINTR close() and EINTR The socket.socket.connect() method does not retry connect() for non-blocking sockets if it is interrupted by a signal (fails with EINTR)...
...close_it = self.obj.close except AttributeError: pass else: close_it() This can be used to deterministically close anything with a close method, be it file, generator, or something else. It can even be used when the object isn't guaranteed to require closing (e.g., a function that accepts an arbitrary iterable): # emulate opening(): with closing(open("argument.txt")) as contradiction: for line in contradiction: print line # deterministically f...
...close(). Closes the event loop, releasing any resources it may hold, such as the file descriptor used by epoll() or kqueue(), and the default executor. This should not be called while the event loop is running. After it has been called the event loop should not be used again. It may be called multiple times; subsequent calls are no-ops. is_closed(). Returns True if the event loop is closed, False otherwise. (Primarily intended for error reporting; please don't implement functionality based...
...close methods. Values passed to send will be returned by the yield statement when the generator is resumed. throw takes an exception and causes the yield statement to raise the passed exception in the generator. close is used to terminate a generator. This turns generators into a form of coroutine and makes them even more powerful. Conditional expressions of the form (TrueValue if Condition else FalseValue) were added. import can use both relative and absolute imports when inside packages. Try/e...
...closed_pattern | value_constraint value_constraint: | eq_constraint | id_constraint eq_constraint: '==' closed_expr id_constraint: 'is' closed_expr closed_expr: # Require a single token or a closing delimiter in expression | primary | closed_factor closed_factor: # "factor" is the main grammar node for these unary ops | '+' primary | '-' primary | '~' primary closed_pattern: # Require a single token or a closing delimiter in pattern | wildcard_pattern ...
Version: None
Released: Oct. 24, 2022
This is the stable release of Python 3.11.0 Python 3.11.0 is the newest major release of the Python programming language, and it contains many new features and optimizations. Major new features of the 3.11 series, compared to 3.10 Some of the new major new features and changes in Python 3.11 …
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...closed at either end and whether the integers are considered in ascending or descending order. This syntax closely matches standard mathematical notation, so is likely to be more familiar to Python novices than the current range() syntax. Open and closed interval endpoints are equally easy to express, and the reversal of an integer interval can be formed simply by swapping the two endpoints and reversing the comparisons. In addition, the semantics of such a loop would closely resemble one way ...
PEP 3135 -- New Super PEP:3135 Title:New Super Author:Calvin Spealman <ironfroggy at gmail.com>, Tim Delaney <timothy.c.delaney at gmail.com>, Lie Ryan <lie.1296 at gmail.com> Status:Final Type:Standards Track Created:28-Apr-2007 Python-Version:3.0 Post-History:28-Apr-2007, 29-Apr-2007, 29-Apr-2007, 14-May-2007, 12-Mar-2009 Contents Numbering Note Abstract Rationale Specification Closed Issues Determining the class object to use Should super actually become a...
...closed, half-closed and aborted. A closed transport will finish writing all of the data queued in it to the underlying mechanism, and will then stop reading or writing data. Aborting a transport stops it, closing the connection without sending any data that is still queued. Further writes will result in exceptions being thrown. A half-closed transport may not be written to anymore, but will still accept incoming data. Protocols Protocols are probably more familiar to new users. The terminol...