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...super().__init__(*args, **kwargs) self.buffers = [] def persistent_id(self, obj): if type(obj) is not bytearray: return None else: index = len(self.buffers) self.buffers.append(obj) return ('bytearray', index) class MyUnpickle(pickle.Unpickler): def __init__(self, *args, buffers, **kwargs): super().__init__(*args, **kwargs) self.buffers = buffers def persistent_load(self, pid): type_t...
...superclass dict.__setitem__(self, key, value) # The metaclass class OrderedClass(type): # The prepare function @classmethod def __prepare__(metacls, name, bases): # No keywords in this case return member_table() # The metaclass invocation def __new__(cls, name, bases, classdict): # Note that we replace the classdict with a regular # dict before passing it to the superclass, so that we # don't continue to record member names after the...
...super mechanism from the class that overrides it. This could be useful as an end-point for a super-call in framework using cooperative multiple-inheritance [7], [8]. A second decorator, @abstractproperty, is defined in order to define abstract data attributes. Its implementation is a subclass of the built-in property class that adds an __isabstractmethod__ attribute: class abstractproperty(property): __isabstractmethod__ = True It can be used in two ways: class C(metaclass=ABCMeta): ...
...super built-in were fixed: When super itself is subclassed, its __get__ method would still return an instance of the base class (i.e., of super). super(C, C()).__class__ would return C rather than super. This is confusing. To fix this, I decided to change the semantics of super so that it only applies to code attributes, not to data attributes. After all, overriding data attributes is not supported anyway. The __get__ method didn't check whether the argument was an instance of the type used ...
...super-quorum" of 3/4 of the Members MUST participate in the email vote by stating 'Aye', 'Nay' or 'Abstain' to a proposed motion, with the vote appended to a quoted version of the exact motion proposed. In the case of a Committee of 8 Members, this will require 6 Members to vote by email. (3) For a motion to pass, an absolute majority of the whole Board MUST vote 'Aye'. In the case of a Committee of 8 Members, this will require 5 Aye votes. ...
...superficially, but in practice the CPython VM and other Python virtual machines have implicit limits or are forced to assume that the limits are astronomical, which is expensive. This PR lists a number of features which are to have a limit of one million. For CPython the hard limit will be eight million (8 000 000). Motivation There are many values that need to be represented in a virtual machine. If no limit is specified for these values, then the representation must either be inefficient or ...
...super-quorum" of 3/4 of the Members MUST participate in the email vote, this email resolution failed. Only 8 of the required 9 votes were cast. RESOLVED, that the Outreach and Education Committee shall have authority to authorize PSF expenditure of up to US$5000 during the calendar year of 2011, to be spent and divided as the Committee determines best assists in promoting diversity with Python communities. Any commitment of PSF funds by the Committee shall be subject to the voting procedur...
...super fast, though, since parsing of the style sheet is only a small portion of the complete transformation process. Ideally, no external C modules are required for the parser, to simplify installation of a generated parser. If C modules are required, then parsers whose C modules are independent from the input language rank better than parsers which generate C code dependent on the input language. If a parser generator uses a generic C module, than this module mig...
...super = super(Element.__make_dict__, self) self._super.__init__(*args, **kwargs) self.elements = [] self.text = None self.tail = None self.attrib = {} def __getitem__(self, name): try: return self._super.__getitem__(name) except KeyError: if name in ['attrib', 'text', 'tail']: return getattr(self, 'set_%s' % name) else: ...
...super types participate in garbage collection. Before this change, it was possible for leaks to occur in functions with non-global free variables that used these types. Extension modules the socket module has a new exception, socket.timeout, to allow timeouts to be handled separately from other socket errors. SF bug 751276: cPickle has fixed to propagate exceptions raised in user code. In earlier versions, cPickle caught and ignored any exception when it performed operations that it expecte...
...super-quorum" of 3/4 of the Directors MUST participate in the email vote by stating 'Aye', 'Nay' or 'Abstain' to a proposed motion, with the vote appended to a quoted version of the exact motion proposed. In the case of a Board of 13 Directors, this will require 10 directors to vote by email. (3) For a motion to pass, an absolute majority of the whole Board MUST vote 'Aye'. In the case of a Board of 13 Directors, this will require 7 Aye votes. (4) Amended to: The proposing Director SHALL se...
...super().__new__(cls, *args) def __mul__(cls, count: int) -> list[Self]: # Rejected return [cls()] * count class Foo(metaclass=MyMetaclass): ... Runtime behavior Because Self is not subscriptable, we propose an implementation similar to typing.NoReturn. @_SpecialForm def Self(self, params): """Used to spell the type of "self" in classes. Example:: from typing import Self class ReturnsSelf: def parse(self, data: bytes) -> Self: ...
...superficially elegant, but poses a significant problem if the interpolated value message_from_user is in fact provided by an untrusted user: it's an opening for a form of code injection attack, where the supplied user data has not been properly escaped before being passed to the os.system call. To address that problem (and a number of other concerns), this PEP proposes the complementary introduction of "i-strings" (a mnemonic for "interpolation template strings"), where f"Message with {data}" wo...
...super() ought to raise NotImplementedError. Example: from typing import Protocol from abc import abstractmethod class Example(Protocol): def first(self) -> int: # This is a protocol member return 42 @abstractmethod def second(self) -> int: # Method without a default implementation raise NotImplementedError Static methods, class methods, and properties are equally allowed in protocols. To define a protocol variable, one can use PEP 526 variable annotat...
...super-quorum" of 3/4 of the Directors MUST participate in the email vote by stating 'Aye', 'Nay' or 'Abstain' to a proposed motion, with the vote appended to a quoted version of the exact motion proposed. In the case of a Board of 13 Directors, this will require 10 directors to vote by email. For a motion to pass, an absolute majority of the whole Board MUST vote 'Aye'. In the case of a Board of 13 Directors, this will require 7 Aye votes. The expiration date/time typically should be at lea...
...super() calls less awful References [1]Explicitation lines in Python: https://mail.python.org/pipermail/python-ideas/2010-June/007476.html [2]'where' statement in Python: https://mail.python.org/pipermail/python-ideas/2010-July/007584.html [3]Where-statement (Proposal for function expressions): https://mail.python.org/pipermail/python-ideas/2009-July/005132.html [4]Name conflict with NumPy for 'where' keyword choice: https://mail.python.org/pipermail/python-ideas/2010-July/0...
...super() calls), there's no way for user level code to explicitly add additional names to that scope. Meanwhile, attributes defined in a class body are ignored for the purpose of defining a method's lexical closure, which means adding them there wouldn't work at an implementation level. Rather than trying to resolve that inherent ambiguity, this PEP simply prohibits such usage, and requires that any affected logic be written somewhere other than directly inline in the class body (e.g. in a separa...
...super-highway thing is such a good idea after all," she said. The ambassador of Japan in Washington is reportedly "very, very confused." A highly placed Speaker of the House, who asked not to be named, is reported to have said, "I thought Guido was an Italian name. Those damn Japanese are sure crafty!" In an unrelated development, Stacker Inc. is reportedly considering bringing action against Van Rossum, Brian Kernigan, and Don Knuth over their alleged infringement on S...
...super modern like the Hyatt in Montreal, but it is A LOT cheaper and it is an average property. 6.8.15 PyCon Sponsors The prospectus has been finalized and is being circulated Sponsors started being signed up this month. 6.8.16 PyCon Website Management PyCon 2013 website was prepared and finished this month. It was launched July 9th. 6.9 Sprint Committee (SC) B. Curtin, Sprint Committee Chair, reported that there were no issues ...
...supertype, derived type or subtype, and metatype. However, sometimes the terminology necessarily blends, for example an object's type is given by its __class__ attribute, and subtyping in Python is spelled with a class statement. If further distinction is necessary, user-defined classes can be referred to as "classic" classes. About metatypes Inevitably the discussion comes to metatypes (or metaclasses). Metatypes are nothing new in Python: Python has always been able to talk about the type ...