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This article introduces the knowledge about "what is the difference between the .py file format of Python and the .pxd.pyx.pyd file format of Cython". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

.py file

The most common format for Python is .py (another more common format is .pyw), which is interpreted by python.exe and can be run under the console.

Of course, it can also be modified with a text editor or other dedicated Python IDE (integrated development environment) tool.

The common situation is to use Python to quickly generate a program prototype (sometimes even the final interface of the program), and then rewrite the parts that have special requirements in a more appropriate language; for example, the graphics rendering module in a 3D game, with particularly high performance requirements, can be rewritten with Calgary +, and then encapsulated as an extension library that can be called by Python. It is important to note that you may need to consider platform issues when using extended class libraries, and some extended class libraries may not provide cross-platform implementation.

In addition, you can use Cython to write C extensions for Python. Cython is an ideal C module language for writing and wrapping the glue code of the external CumberCraft + library, embedding CPython into existing applications and speeding up the execution of Python code.

.pxd file

The .pxd file is a Python extension module header file written by the Cython programming language.

The .pxd file is similar to the .h header file of the C language, and the .pxd file contains the Cython declaration (or code snippet) to be included by the Cython module.

.pxd files can share external C language declarations or contain C compiler inline functions. The .pxd file also provides a Cython interface for the .pyx file module so that other Cython modules can communicate with it using a more efficient protocol than Python.

You can import a .pxd file into a .pyx module file using the cimport keyword.

.pyx file

The .pyx file is a Python extension module source code file "written" by the Cython programming language.

The .pyx file is similar to the C language .c source code file, and the .pyx file contains the source code for the Cython module.

Unlike .py files that can be directly interpreted and used in the Python language, .pyx files must be compiled into .c files and then into .pyd (Windows platform) or .so (Linux platform) files before they can be imported as module import.

.pyd file

The .pyd file is a non-Python Python extension module generated by other programming languages "write-compile".

When Python imports a .pyd file, it actually encapsulates a module in the .pyd file. When you use it in python, you can use it as module, that is, "import pathname .modulename", and the pathname is the path where the .pyd file is located.

Qt/C++-based PyQt, PySide GUI (graphical user interface) development framework bindings generate an intermediate .pyd file for each Qt/C++ library .dll file. In the PyWin32 project distribution, there are also many intermediate .pyd files for MicroSoft Windows OS corresponding .dll files.

Cython can compile Python modules written by individuals based on Python into .pyd files with C language features.

That's all for "what's the difference between the .py file format of Python and the .pxd.pyx.pyd file format of Cython". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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