Binary library python
One of the features of the Binary library python reference interpreter is that, in addition to allowing the execution of Python code, it also exposes a rich C API for use by other software. The CPython standard library makes extensive use of accelerator modules. The CPython standard library makes extensive use of wrapper modules.
Not all extension modules will fit neatly into the above categories. The extension modules included with NumPy, for example, binary library python all three use cases - they move inner loops to C for speed reasons, wrap external libraries written in C, FORTRAN and other languages, and use low level system interfaces for both CPython and the underlying operation system to support concurrent execution of vectorised operations and to tightly control the exact memory layout of created objects.
The main disadvantage of using binary extensions is the fact that it makes subsequent distribution of the software more difficult. When extension modules are just being used to make code run faster after profiling has identified the code where the speed increase is worth additional maintenance efforta number of other alternatives should also be considered:.
However, wrapping modules by hand is quite tedious, so a number of other binary library python approaches should be considered.
In addition to being binary library python for the creation of accelerator modules, Cython is also useful for creating wrapper modules. It still involves wrapping the interfaces by hand, however, so may not be a good choice binary library python wrapping large APIs.
By contrast, the above alternatives binary library python all able to operate at the C API level, using C header files to ensure consistency between the interface exported by the library being wrapped and the one expected by the Binary library python wrapper module.
While cffi can operate directly at the C ABI level, it suffers from the same interface inconsistency problems as ctypes when it is used that way. For applications that need low level system access regardless of the reasonbinary library python binary extension module often is the best way to go about it. This is particularly true for low level access to the CPython runtime itself, since some operations like releasing the Global Interpreter Lock are simply invalid when the interpreter is running code, even if a module like ctypes or cffi is used to obtain access to the relevant C API interfaces.
The CPython Extending and Embedding guide includes an introduction to writing a custom extension module in C. Before it is possible to build a binary extension, it is necessary to ensure that you have a suitable compiler available.
On Windows, Visual C is used to build the binary library python CPython interpreter, and should be used to build compatible binary extensions.
Unfortunately, older versions of Visual Studio are no longer easily available from Microsoft, so for versions of Python prior to 3.
Note that from Python 3. For interim guidance on this topic, see the discussion in this issue. Cross-platform development binary library python distribution of extension modules is a complex topic, so this guide focuses primarily on providing pointers to various tools that automate dealing with the underlying technical challenges.
The additional resources in this section are instead intended for developers looking to understand more about the underlying binary interfaces that those systems rely on at runtime. For a more in depth explanation of how extension modules are used by CPython on a Debian system, see the following articles:. Dropping Support for Older Python Versions. Supporting Windows using Appveyor. This means that binary extensions: The CPython standard libary includes a number binary library python optimised data structures and algorithms especially in the builtins and the collections and itertools modules.
The Python Package Index also offers additional alternatives. Sometimes, the appropriate choice of standard library or third party module can avoid the need to create your own accelerator module. Cython is a mature static compiler that can compile most Python code to C extension modules. Binary library python is a newer tool, created by members of the scientific Python community, that aims to leverage LLVM to allow selective compilation of pieces binary library python a Python application to native machine code at runtime.
It requires that LLVM be available on the system where the code is running, but can provide significant speed increases, especially for operations that are amenable to vectorisation.
To set up a build environment for binary extensions, the steps are as follows: Use a recent version of setuptools in your setup. Install Visual Studio Community Binary library python or any later version, when these are released. FIXME cover publishing as wheel files on PyPI or a custom index server cover creation of Windows and macOS installers mention the fact that Linux distros have a binary library python to build from source in their own build systemsso binary - only releases are strongly discouraged.
What are c python extension modules? The Python Software Foundation is a non-profit binary library python. Last updated on Apr 04, Created using Sphinx 1.
While The Python Language Reference describes the exact syntax and semantics of the Python language, this library reference manual describes the standard library that is distributed with Python. It also describes some of the optional components that are binary library python included in Python distributions. Some of these modules are explicitly designed to encourage and enhance the portability of Python programs by abstracting away platform-specifics into platform-neutral APIs.
The Binary library python installers for the Windows platform usually include the entire standard library and often also include many additional components. For Unix-like operating systems Python is normally provided as a collection of packages, so it may be necessary to use the packaging tools provided with the operating system to obtain some or all of the optional components.
In addition to the standard library, there is a growing collection of several thousand components from individual programs and binary library python to packages and entire application development frameworksavailable from the Python Package Index.
Constants added by the site module 4. Truth Value Testing binary library python. Boolean Operations — andornot 4. Numeric Types — intfloatcomplex 4. Sequence Types — listtuplerange 4. Text Sequence Type — str 4. Binary Sequence Types — bytesbytearraymemoryview binary library python.
Set Types — setfrozenset 4. Mapping Types — dict 4. Context Manager Types 4. Other Built-in Types 4. Text Processing Services 6. Binary Data Services 7. Numeric and Mathematical Modules 9.
Functional Programming Modules File and Binary library python Access Data Compression and Archiving Generic Operating System Services The concurrent package Interprocess Communication and Networking Internet Data Handling Structured Markup Processing Tools XML Processing Modules Internet Protocols and Support Graphical User Interfaces with Tk Other Graphical User Interface Packages Debugging and Profiling The Python Profilers Software Packaging and Distribution Python Runtime Services Custom Python Interpreters Python Language Services MS Windows Specific Services Unix Specific Binary library python Full Grammar specification Next topic 1.
The Python Software Foundation is a non-profit corporation. Last updated on Apr 01, Created using Sphinx 1.