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...interfaces. It is purely a question of what operations are included within those interfaces -- and the names of the operations are unimportant. Interfaces (at least the ones provided by overloading) are always considered less-specific than concrete classes. Other interface implementations can decide on their own specificity rules, both between interfaces and other interfaces, and between interfaces and classes. Non-Method Attributes in Interfaces The Interface implementation actually treats ...
...definitions is given in the python3.def file [1]; those declared DATA denote variables. Other Macros All macros defining symbolic constants are available to applications; the numeric values will not change. In addition, the following macros are available: Py_BEGIN_ALLOW_THREADS, Py_BLOCK_THREADS, Py_UNBLOCK_THREADS, Py_END_ALLOW_THREADS The Buffer Interface The buffer interface (type Py_buffer, type slots bf_getbuffer and bf_releasebuffer, etc) has been omitted from the ABI, since the stab...
...interface as the .encode/.decode methods of Codec instances (see Codec Interface). The functions/methods are expected to work in a stateless mode. stream_reader and stream_writer These need to be factory functions with the following interface: factory(stream,errors='strict') The factory functions must return objects providing the interfaces defined by StreamWriter/StreamReader resp. (see Codec Interface). Stream codecs can maintain state. Possible values for errors are defined in the Codec s...
...definitions [1] [2]. Bridging the gap found between "builtin" functions which specify positional-only parameters and pure Python implementations that lack the positional syntax would improve consistency. The / syntax is already exposed in the existing documentation such as when builtins and interfaces are generated by the argument clinic. Another essential aspect to consider is PEP 399, which mandates that pure Python versions of modules in the standard library must have the same interface and s...
...Interface, as well as the interfaces implemented by the MyFishMarket class. It's worth going into a little bit more detail about interface assertions. An interface assertion is either an interface object, or a tuple of interface assertions. For example: FooInterface FooInterface, (BarInterface, BobInterface) FooInterface, (BarInterface, (BobInterface, MyClass.__implements__)) Are all valid interface assertions. When two interfaces define the same attributes, the order in which information...
...interface. Unfortunately, the COM interface was much too slow to handle the massive number of table cells that were extracted from the BEACON source code. Worse were the reuse issues with the classes I was writing for dealing with the different stylistic requirements at the different levels of sections, headings, paragraphs, and phrases. To address these problems, I considered writing ASCII text files to specify margins, font, heading level, and insertion points for standard forms. But inventing...
...interfaces Guido [6] and others have occasionally suggested introducing interfaces into python. Most suggestions have offered syntax along the lines of: interface IFoo: """Foo blah blah""" def fumble(name, count): """docstring""" but since there is currently no way in Python to declare an interface in this manner, most implementations of Python interfaces use class objects instead, e.g. Zope's: class IFoo(Interface): """Foo blah blah""" def fumble(name, count): ...
...interface(s). This is from a posting by Bob Ippolito on python-dev based on experience with PyProtocols. def provides(*interfaces): """ An actual, working, implementation of provides for the current implementation of PyProtocols. Not particularly important for the PEP text. """ def provides(typ): declareImplementation(typ, instancesProvide=interfaces) return typ return provides class IBar(Interface): """Declare something about IBar her...
...interface [zope-interfaces] was one of the first widely used approaches to structural subtyping in Python. It is implemented by providing special classes to distinguish interface classes from normal classes, to mark interface attributes, and to explicitly declare implementation. For example: from zope.interface import Interface, Attribute, implementer class IEmployee(Interface): name = Attribute("Name of employee") def do(work): """Do some work""" @implementer(IEmployee) cla...
PEP 3152 -- Cofunctions PEP:3152 Title:Cofunctions Author:Gregory Ewing <greg.ewing at canterbury.ac.nz> Status:Rejected Type:Standards Track Created:13-Feb-2009 Python-Version:3.3 Post-History: Contents Abstract Rejection Specification Cofunction definitions Cocalls New builtins, attributes and C API functions Motivation and Rationale Prototype Implementation Copyright Abstract A syntax is proposed for defining and calling a special type of generator called a 'co...
...interfaces needed to process XML 1.0 compliant XML. Some documentation is already available. pyexpat: Renamed to xml.parsers.expat since this is part of the new, packagized XML support. C API Add three new convenience functions for module initialization -- PyModule_AddObject(), PyModule_AddIntConstant(), and PyModule_AddStringConstant(). Cleaned up definition of NULL in C source code; all definitions were removed and add #error to Python.h if NULL isn't defi...
...definitions. However, for JavaScript, that's all there is. Python, on the other hand, supports writing much larger programs and better code reuse through a true object-oriented programming style, where classes and inheritance play an important role. Perl Python and Perl come from a similar background (Unix scripting, which both have long outgrown), and sport many similar features, but have a different philosophy. Perl emphasizes support for common application-oriented tasks, e.g. by...
...Interfaces Configuration Context Buffer Socket Cipher Suites OpenSSL SecureTransport SChannel Network Security Services (NSS) Proposed Interface Protocol Negotiation TLS Versions Errors Certificates Private Keys Trust Store Runtime Access Changes to the Standard Library Migration of the ssl module Future Credits Copyright Abstract This PEP would define a standard TLS interface in the form of a collection of abstract base classes. This interface would allow Python implementations and t...
...Interfaces Any backwards compatibility guarantees apply only to public interfaces. Accordingly, it is important that users be able to clearly distinguish between public and internal interfaces. Documented interfaces are considered public, unless the documentation explicitly declares them to be provisional or internal interfaces exempt from the usual backwards compatibility guarantees. All undocumented interfaces should be assumed to be internal. To better support introspection, modules should ex...
...interface (protocol) to be queried as well, which gives more dynamic abilities (more Pythonic). Second, there is no special "IUnknown" interface which can be used to check or obtain the original unwrapped object identity, although this could be proposed as one of those "special" blessed interface protocol identifiers. Third, with QueryInterface, once an object supports a particular interface it must always there after support this interface; this proposal makes no such guarantee, since, in par...
...Interface front-end is written in Adobe Flex, and provides aid to the functionality exposed by the server. It requires a live connection to the server in order to function. A JavaScript 'tracking code' is installed on client web pages and provides the server with active web analytics. Some of the other technologies we're using at the moment for WordStream are Adobe Flex, Linux, Apache, and C/C++. As for development process tools, we're using PyDev Extensions, Trac, Buildbot, Review Board, and ...
...definition of n(), the distinction can be expressed as: "": text string n(""): native string b"": binary data (While n=str works for simple cases, it can sometimes have problems due to non-ASCII source encodings) In the common subset of Python 2 and Python 3 (with appropriate specification of a source encoding and definitions of the u() and b() helper functions), they can be expressed as: u(""): text string "": native string b(""): binary data That last approach is the only variant that supp...
...Interface Syntax - Pelletier Jim Fulton has said that this PEP was premature. I agree. It introduces a new keyword, 'interface', and I'm not yet convinced that that is needed. On the other hand, the way this is currently done in Zope also looks butt-ugly, so something may indeed be needed. I think that at some point in the future when we have more experience with using interfaces (especially in Zope 3) we'll go back to this PEP and see how much of it we can use. Maybe there should ...
...interface for pip [1] and other distribution or installation tools to use when working with Python source trees (both the developer tree - e.g. the git tree - and source distributions). The programmatic interface allows decoupling of pip from its current hard dependency on setuptools [2] able for two key reasons: It enables new build systems that may be much easier to use without requiring them to even appear to be setuptools. It facilitates setuptools itself changing its user interface without...
Search Python Resources <H1>Search Python Resources</H1> These are minimalistic quick search forms. For more elaborate interfaces, click on the "advanced search" links below.<P> <FORM method="GET" ACTION="http://www.google.com/search"> <P> Search the <A HREF="http://www.python.org">Python Website</A> using <img border="0" src="/images/Google_Logo_25wht.gif" alt="Google" align=&qu...