Protecting Python Sources With Cython

Visual Studio Code is a lightweight but powerful source code editor which runs on your desktop and is available for Windows, macOS and Linux. Python seems to be not the best language to protect for a desktop application. Caution: We do not recommend downloading python_d. On derivatives, pyql seems to be more developed than the R version. Sur ce que j'ai lu sur raspberry, son utilisation est équivalente à travailler sur GNU/Linux, donc python ou C, ou cython C/python ne devrait poser aucun problème. How would you protect Python source code on a physical product (like a IoT device), which comes with Ubuntu installed on a mini-PC running Python code? Few methods we thought about: Compiling the Python code (using PyInstaller, or other products). High performance functional utilities Anaconda Community Open. In this article we go over the Python file types. 0 for 32-bit Linux with Python 3. The Python programming language has come to dominate machine learning in general, and NLP in particular. Below, we describe how we encrypt and append an HMAC to each Python file that we ship for these purposes. Starting with Python 3. As an example, one function in Python can take about 10 strings of code, whereas C++ will require twice as many strings. py import pyconcrete; pyconcrete will hook import module; when your script do import MODULE, pyconcrete import hook will try to find MODULE. pyo (optimized code) files so that executing the same piece of source code is way faster from the second time onwards (recompilation from source to bytecode can be avoided). Friends, Today's Tutorial Is About How To Create Simple Packet Sniffer Using Python Language. The Python standard library includes a compileall module that can scan your source directory and compile all of your files into Python bytecode. It is quite easy to add new built-in modules to Python, if you know how to program in C. So, there's this interesting article that came by this week called, "Using Cython to Protect a Python Codebase. use combined source code level debugging to find bugs in your Python, Cython and C code. Although protecting Python sources from reverse engineering seems like a futile task at first, cythonizing all the code leads to a reasonable amount of security (the binary is very difficult to disassemble, but it's still possible to e. py script (likely required anyway) pyximport. Protect your python script, encrypt it as. 在 python 中,strings, tuples, 和 numbers 是不可更改的对象,而 list,dict 等则是可以修改的对象。 不可变类型:变量赋值 a=5 后再赋值 a=10,这里实际是新生成一个 int 值对象 10,再让 a 指向它,而 5 被丢弃,不是改变a的值,相当于新生成了a。. Each interpreter was able. Outputs Python source code for maximum flexibility. Python programming language, the l imitation of research source for Cython programming language is one of the main reasons that Python programm ing language is easier to code. (Sorry also for the crazy link; Duke now uses malware protection that mangles all URLs we send out). PyCharm lets you run your tests: a test file, a single test class, a method, or all tests in a folder. Get up to speed with Cython 3. Generated (. 6% increase over baseline. pyd, and how they're used to store bytecode that will be imported by other Python programs. Obfuscating the source code. You will learn to write fast and thread-safe Python, and how to choose between threads and processes. Here's the results:. The Python Interpreter. After making further researches I am going to answer to my own question. Source Files and Compilation¶ Cython source file names consist of the name of the module followed by a. I'll show examples to help you grok the GIL. Yum will always call system Python because the path /usr/bin/python is hardcoded in its source code. The following is the entire 129 line Python source code file with in-line annotations explaining pynmsg API calls. Speeding up Websockets 60X I recently I had the opportunity to speed up some Websocket code that was a major bottleneck. tryexceptpass - Build real-world software with Python and Open Source. Can i compile my python source into binary ? I have read about py2exe for windows. Preventing competitors from using the source code as their own or write their inspired version of the same code, one way to protect is to add signatures to your program logic (some secrets to be able to prove that code was stolen from you) and obfuscate the python source code so, it’s hard to read and utilize. Although protecting Python sources from reverse engineering seems like a futile task at first, cythonizing all the code leads to a reasonable amount of security (the binary is very difficult to disassemble, but …. Users do not interact directly with the Python code; they only know this project as an Excel add-in. 6 Kb; Introduction. dll dependency2. Going to the basics, the Python Interpreter is a machine that: Consumes Python code (. We need to configure Python with the ActiveTcl dependency because matplotlib depends on it. For the past year, we've compared nearly 15,000 open source Python projects to pick Top 30 (0. c or example_wrap. Next topic. But my personal opinion is that one of the deep insights in Python's implementation is that a language can be compiled (Python modules are compiled to. It is possible to use above process to protecting Python code. PyInstaller can follow import statements that refer to Cython C object modules and bundle them. The Python packages should also be named with a python3- prefix instead of a python- prefix. How To Package Your Python Code¶ This tutorial aims to put forth an opinionated and specific pattern to make trouble-free packages for community use. Cython is written in Python and C and works on Windows, macOS, and Linux, producing source files compatible with CPython 2. (preferred) Installing with Pip:. After making further researches I am going to answer to my own question. Python is a high-level language with multiple applications including database management, handling FITS images and tables, statistical analysis, and more advanced topics. com,1999:blog-1912917464549903472. By providing the neuroscientific community with BluePyOpt, an open source tool to optimise model parameters in Python which is powerful, easy to use and broadly applicable, we hope to catalyse community uptake of state-of-the-art model optimisation approaches, and encourage code sharing and collaboration. 最近,我在做一个需要使用Cython来保护整个代码库的Python项目。 起初尽管保护Python源码免受逆向工程的影响似乎是一项徒劳无功的任务,但是所有代码的cythonizing都会带来合理的安全性(二进制文件非常难以拆解,但是还可以通过程序的猴子补丁程序来完成)。. 10 in a terminal (they work beautifully side by side out of the box): # refreshing the repositories sudo apt update # its wise to keep the system up to date! # you can skip the following line if you not # want to update all your software sudo apt upgrade # installing python 2. To successfully complete this tutorial you'll need to know the basics of Python (you can get started at python. This can be inconvenient if you want to wrap some external C functions and provide the Python user with Python functions of the same names. so modules (real binaries) and only then package. Protecting Your Users From Change. This will help ensure the success of development of pandas as a world-class open-source project, and makes it possible to donate to the project. I don't think "hacking the source" is a major problem. Using Cython you can convert Python modules into C and compile the C to machine language. 0 Protecting secrets with Oslo. py file ¶ In order to implement the first desired result, you need to create a __main__. The Python standard library includes a compileall module that can scan your source directory and compile all of your files into Python bytecode. It comes with an optimising compiler that translates Python code into C code for Python extension modules, and tightly adapts the generated code to the available static type. On Mac with Python3: string 0. 20524s total, 2436182. We've got Python, we've got PyPy, we've got Cython, we've got IronPython, all these variations. Become a Member Donate to the PSF. zip On Unix, you can roll the source ZIP together with the startup script:. How can I accomplish this task to hiding the source code from the user but running the code perfectly with the same performance. py file to run it. Python Programming. Google-fu only yields seven results, all about gentoo users trying compile yasm, and the only solution they came up with was to disable python support; this clearly isn't an option here. Articles, examples, talks and courses. pyc content). The final solution was 60X (!) faster than the first pass, and an interesting exercise in optimizing inner loops. Below, we describe how we encrypt and append an HMAC to each Python file that we ship for these purposes. What you can do with Raspberry Pi and Python The combination of Raspberry Pi and Python can be used for multiple purposes. Python Forums on Bytes. I am developing a paid application in python. Python byte code is not binary machine code (e. Faster code via static typing. The pip python pacakge manager is the standard package manager. The best solution that I have found so far is protecting the python source with a tool called Cython : Protecting Python Sources With Cython – Vitaly Gordon – Medium. sudo pip3 install Cython --install-option="--no-cython-compile" ##### create python file (make sure you use only one kind of indentation, i. Read this book using Google Play Books app on your PC, android, iOS devices. Can I distribute the bytecode only (. These sites distribute EXE files that are unapproved by the official python_d. NET, etc) · Experience in creating and deploying software builds and releases · Experience with auto-documentation tools (Python Sphinx, Doxygen, Javadoc, ESdoc, etc). Some of the popular items include:. A Python Book 1 Part 1 ­­ Beginning Python 1. pyo offer better protection? > > If you're worried about something akin to corporate espionage or > some-such, I don't know of a better way than ShedSkin or Cython. dll dependency2. Protect python script work flow. Software as a service is regarded as the safest way. Speeding up Websockets 60X I recently I had the opportunity to speed up some Websocket code that was a major bottleneck. In Detail Cython is a very powerful combination of Python and C. org's getting started page). The Python programming language is becoming very popular within the astronomical community. What's this course about and how is it different? This is *the* definitive course on parallel programming in Python. txt in the root directory is one way for Heroku to recognize your Python app. Students frequently seek for Python assignment help in locating great professionals, however, few times they succeed. Cython is an optimising static compiler for both the Python programming language and the extended Cython programming language (based on Pyrex). Google-fu only yields seven results, all about gentoo users trying compile yasm, and the only solution they came up with was to disable python support; this clearly isn't an option here. 7 strings per second 91. If you want to know what companies use Python in the financial sphere, just scroll the list: Bank of America. Change into the nuitka folder and issue python setup. http://cython. Here's the results:. It doesn't describe the only way of doing things, merely one specific approach that works well. While migrating spbot to the Stretch job grid I ran into a problem while installing oursql with pip (for python 2. If you are about to ask a "how do I do this in python" question, please try r/learnpython, the Python discord, or the #python IRC channel on FreeNode. cxx and a Python source file example. Protect your python script, encrypt it as. This creates two different files; a C/C++ source file example_wrap. A Python Book 1 Part 1 ­­ Beginning Python 1. The collection of libraries and resources is based on the Awesome Python List and direct contributions here. Also since venv is in the Python standard library, it’ll updated only when a new version of Python is released. 4-1) [universe] encoder, decoder, and lint/validator for JSON in Python. I love Guido and the gang and I am vastly grateful for all the use and pleasure I have gotten out of Python, but, guys, this is a wake-up call. bat # python. write Python code that calls back and forth from and to C or C++ code natively at any point. News: information about the most recent releases. py modules and translates them to high-performant C files. This will help ensure the success of development of pandas as a world-class open-source project, and makes it possible to donate to the project. The mnfy project provides a minifier for Python code. It is very fast and lightweight, and the entire database is stored in a single disk file. py script (likely required anyway) pyximport. dist-info. It's possible with Cython, the compiler and hybrid programming language used by foundational packages such as NumPy, and prominent in projects including Pandas, h5py, and scikits-learn. فایل های کامپایل شده پایتون (pyc) قابل دیکامپایل شدن هستند و با روش های مهندسی معکوس به راحتی می توان به محتوای آنها دسترسی پیدا کرد. This is a simple example to quick learn how to generate a python wrapper for C library. What you have to do now is to start a Linux terminal window. Python language has a very quick runtime, that is making the language a preferable option for FinTech area. Outputs Python source code for maximum flexibility. 28 Jupyter Notebook Tips, Tricks, and Shortcuts Jupyter Notebook Jupyter notebook, formerly known as the IPython notebook, is a flexible tool that helps you create readable analyses, as you can keep code, images, comments, formulae and plots together. With just a few lines of Python, it's easy to create a keylogger that defeats every commercial antivirus product, from Kaspersky to FireEye. Cython with preprocessor. It's very difficult to reverse-engineer, largely because there aren't specialised tools to do it. Now the source encoding declaration on the second line isn't effective if the first line contains anything except a comment. Even if python compiled into assembly, people could still look at that assembly to see how it works. Caution: We do not recommend downloading python_d. Change into the nuitka folder and issue python setup. It is possible to use above process to protecting Python code. pye and decrypt when import it - Falldog/pyconcrete. If we want to protect our code from other people's eyes, we can definitely build it using Cython and distribute it without the source code. Protect python script work flow. cython build log. Python Class implementing polynomial functions. pandas is a NumFOCUS sponsored project. Python is a high-level, structured, open-source programming language that can be used for a wide variety of programming tasks. Revit python wrapper. I am able to compile my cython extensions (and create an installation for the rest of the package) using setuptools. c files from a. Download with Google Download with Facebook or download with email. In brief: most of MGET is written in Python. Cython is a general purpose programming language that forms a best-of-both-worlds cross between the Python language and the ubiquitous datatypes of the C/C++ language. ) Bottleneck takes a few minutes to build on newer machines. This protection should be from both malicious attackers, and natural sources such as disk-based bit rot, or network transmission errors. Added in version 1. Cross-platform portability: Runs on OS X, Windows, Linux/UNIX, and other platforms that support standard Python. py modules and translates them to high-performant C files. About This Book Covers the latest and advanced concepts of Python such as parallel processing with Python 3. pyo (optimized code) files so that executing the same piece of source code is way faster from the second time onwards (recompilation from source to bytecode can be avoided). Python is enjoying commercial success, but perhaps less so in cases where end-users actually install the software. A number of tactics have been employed to make Python faster. Mathematician or Poet "The difference between the poet and the mathematician is that the poet tries to get his head into the heavens while the mathematician tries to get the heavens into his head. (b) Use cython instead of Python. pyc file? Python automatically compiles your script to compiled code, so called byte code, before running it. Preventing competitors from using the source code as their own or write their inspired version of the same code, one way to protect is to add signatures to your program logic (some secrets to be able to prove that code was stolen from you) and obfuscate the python source code so, it’s hard to read and utilize. It need not be foolproof as long as it adds inconvenience to pirates. C is for Python. Added in version 1. 10 in a terminal (they work beautifully side by side out of the box): # refreshing the repositories sudo apt update # its wise to keep the system up to date! # you can skip the following line if you not # want to update all your software sudo apt upgrade # installing python 2. Well, one good reason lots of people consider is to accelerate the speed of code process. Speakers get -25%, volunteers -50%, tutors of workshops over 2 hours and coorganizers who invested more than 8 hours get -100%. Cython: A Guide for Python Programmers - Ebook written by Kurt W. It is available free, from its Web site, in C source code, or as executables for Windows, Mac OS X, and Mac OS 8 or 9. But my personal opinion is that one of the deep insights in Python's implementation is that a language can be compiled (Python modules are compiled to. 7 runtime includes several third-party libraries. This post is cover the way to use Cython to generate C extension for Python file to gain faster processing time. The compiler works by generating C or C++ source code (containing Python/C API calls) from Cython code, which can in turn be compiled by an optimizing C/C++ compiler, such as GCC, into a stand-alone application embedding the Python interpreter, or a binary dynamic shared object (DSO). Some functions can be implemented much faster using specifically Python. py import pyconcrete; pyconcrete will hook import module; when your script do import MODULE, pyconcrete import hook will try to find MODULE. The fundamental nature of Cython can be summed up as follows: Cython is Python with C data types. In addition to the Python standard library and the App Engine libraries, the Python version 2. the Cython language, a superset of Python that additionally supports the declaration of C/C ++ types for variables and class at tributes, and pro vides a con venient foreign function interface. driver system property (see sample below) (Python only) include the path to ChromeDriver when instantiating webdriver. Implementation as a Python module offers great flexibility due to the wide range of scientific Python modules that can be used without having to transform the basis data types. 28 Jupyter Notebook Tips, Tricks, and Shortcuts Jupyter Notebook Jupyter notebook, formerly known as the IPython notebook, is a flexible tool that helps you create readable analyses, as you can keep code, images, comments, formulae and plots together. If you are very paranoid about protecting your sources, perhaps you shouldn't distribute it at all, but provide a web application? Sturla -- http. The per-formance of Cython was therefore often similar to CPython. Although protecting Python sources from reverse engineering seems like a futile task at first, cythonizing all the code leads to a reasonable amount of security (the binary is very difficult to disassemble, but it's still possible to e. Users do not interact directly with the Python code; they only know this project as an Excel add-in. Fortunately, Cython provides a way to spot these bottlenecks: a source code report that shows at a glance which parts of your Cython app are pure C and which parts interact with Python. We've got Python, we've got PyPy, we've got Cython, we've got IronPython, all these variations. rpm for Cooker from OpenMandriva Main Release repository. This is a pretty radical departure from what people tend to mean when they say “embedding”, but it has the major benefit that there’s just far more C-in-Python tooling available than Python-in-C. The generated C source file contains the low-level wrappers that need to be compiled and linked with the rest of your C/C++ application to create an extension module. Protect your python script, encrypt it as. You might have worked with. Also since venv is in the Python standard library, it’ll updated only when a new version of Python is released. pyd dependency1. \$\begingroup\$ @RainLee Also you can compile cython with cython -a MODULE. http://cython. Although protecting Python sources from reverse engineering seems like a futile task at first, cythonizing all the code leads to a reasonable amount of security (the binary is very difficult to. While the primary intent of Cython is for enhanced performance, there shouldn't be any barriers for using it for source-code protection. The better optimized the app, the less interaction there will be with Python. com Blogger 22 1 25 tag:blogger. Also I found more information in this topic from Stackoverflow :. org's getting started page). Cython can automatically convert many C types from and to Python types, as described in the documentation on type conversion, so we can use a simple list comprehension here to copy the C int values into a Python list of Python int objects, which Cython creates automatically along the way. \$\begingroup\$ @RainLee Also you can compile cython with cython -a MODULE. The time has come for us to pry open the box. pyc files can still be decompiled into source code, but the code will not be as readable as it was before. py and then running:. Open-source. On statistics, Python just doesn't have as much developed as R does on those fronts, but statsmodels is my goto. SAMT2 is a complete re-implementation and enhancement of the Spatial Analysis and Modeling Tool (SAMT) in the form of a Python module. Resulting C files can be compiled into native binary libraries with no effort. How can I accomplish this task to hiding the source code from the user but running the code perfectly with the same performance. x is the latest version of the Python language and is recommended by the Raspberry Pi Foundation too. (If you obtained bottleneck directly from the repository, then you will need to generate the C source files using the included Makefile which requires Cython. Another potential workaround is to use C-extenstion, or better known as Cython. Convert the python code into c code. a guest Jan je recupère le source de python-openzwave o ApplicationStatus. Python syntax and data types. Click these links for a few recent popularity metrics: Redmonk , Tiobe , PyPL. Meet Cython, an optimizing static compiler that takes your. Or, hell, compile all your Python in Cython’s embedded mode. Implementation as a Python module offers great flexibility due to the wide range of scientific Python modules that can be used without having to transform the basis data types. Additionally, it is worth noting that Cython aims to be source-compatible with Python in "pure Python" mode 10, in which functions provided by the CYTHON module. Introduction Cython is a software that generate a C build program for Python. py -n 58 file3. MySQLdb module. Pics of : Floor Python Library. Read this book using Google Play Books app on your PC, android, iOS devices. This module provides some utility functions to support installing Python libraries. Protecting your Python sources from unwanted readers is easier said than done, because. But I am working on some patches which bring the __cinit__ like Cython magic method to the nogil extension. So, there's this interesting article that came by this week called, "Using Cython to Protect a Python Codebase. 7 and pip for it sudo apt install python2. Speeding up Websockets 60X I recently I had the opportunity to speed up some Websocket code that was a major bottleneck. The Python package fluidfft provides a common Python API for performing Fast Fourier Transforms (FFT) in sequential, in parallel and on GPU with different FFT libraries (FFTW, P3DFFT, PFFT, cuFFT). The mission of the Python Software Foundation is to promote, protect, and advance the Python programming language, and to support and facilitate the growth of the international. txt file lists the app dependencies together. Rolling-your-own means that you need to write ten-thousand lines of boiler-plate codes, that are already provided by a. We've got Python, we've got PyPy, we've got Cython, we've got IronPython, all these variations. easy_install is now included by default. Heroku recognizes an app as a Python app by looking for key files. Python High Performance Programming. NET and Unity). -Version control system such as Git, CVS and Mercurial. Despite the reptiles, it is named after the BBC comedy series Monty Python’s Flying Circus, of which Guido is a fan (see the following silly sidebar). Each Cython module has a single module-level namespace for both Python and C names. Dropbox and BitTorrent are written in Python. Fortunately, Cython provides a way to spot these bottlenecks: a source code report that shows at a glance which parts of your Cython app are pure C and which parts interact with Python. I have attempted to use setuptools and numpy. “Freezing” your code is creating a single-file executable file to distribute to end-users, that contains all of your application code as well as the Python interpreter. (preferred) Installing with Pip:. Change into the nuitka folder and issue python setup. , but my preferred method is to write the C as efficiently as possible for a performance dependent function (those related to the DGA especially), and wrap it manually for Python to import as a module. Friends, Today's Tutorial Is About How To Create Simple Packet Sniffer Using Python Language. exe from "EXE download" sites. Python's popularity and beginner friendliness has led to a wealth of tutorials and example code on the internet. 7 you simply need to do the following in Ubuntu 17. x is the latest version of the Python language and is recommended by the Raspberry Pi Foundation too. There you move to the directory of your virtual Python environment - in my case to "/projekte/GIT/ai/ml1". Use {} curly brackets to construct the dictionary, and [] square brackets to index it. How To Package Your Python Code¶ This tutorial aims to put forth an opinionated and specific pattern to make trouble-free packages for community use. “Freezing” your code is creating a single-file executable file to distribute to end-users, that contains all of your application code as well as the Python interpreter. Python Technical Leader / Machine Learning Stack. Get help from experts in C++, PHP, Visual Basic, HTML, CSS, JavaScript, Java. Think of e. -Version control system such as Git, CVS and Mercurial. Source Code. About the BitBoost Python Code Obfuscator. Is it possible to protect P/Cython code against reverse engineering / decompilation? What are probed countermeasures? Consuli Any answer to that question that looked like a "yes" would just lead you into a false sense of security. What exactly is intended for ? That is most likely the question came out from everyone. Python works on RPython, PyPy, IronPython, Jython and CPython executions, Stackless Python, powerful and dynamic, duck typing discipline and Cython dialect and cross-platform operating systems. However, if this really is your major blocker to using Python, I suggest compiling with Cython. Google-fu only yields seven results, all about gentoo users trying compile yasm, and the only solution they came up with was to disable python support; this clearly isn't an option here. 2-1build1) [universe] DEMGenGeo is a library for creating geometry files python-demjson (2. 6% increase over baseline. pandas is a NumFOCUS sponsored project. They are extracted from open source Python projects. "Contributors" are individuals and organizations that work together to develop a software component. Previous topic. 10 in a terminal (they work beautifully side by side out of the box): # refreshing the repositories sudo apt update # its wise to keep the system up to date! # you can skip the following line if you not # want to update all your software sudo apt upgrade # installing python 2. Distributing Python Programs As Compiled Binaries: How-To. pyo offer better protection? > > If you're worried about something akin to corporate espionage or > some-such, I don't know of a better way than ShedSkin or Cython. Quote:The bundled app does not include any source code. Cython is a compiler. On top of these packages is the Sage library, which consists of over 700,000 lines of new Python and Cython code. py modules and translates them to high-performant C files. Running scripts. These functions compile Python source files in a directory tree. Python Forums on Bytes. Traditionally PyCons follow "the whole world pays" principle with some discounts. The source. Economist Paul Romer, a co-winner of the 2018 Nobel Prize in economics, uses the programming language Python for his research, according to Quartz. The objective of this Python project is to permit fast and simple interaction design and fast prototyping while making your code deployable and reusable. Eclipse now adds your specified libraries onto the Python path for resolving imports. There are several ways to install LibMR for Python. exe source. Download with Google Download with Facebook or download with email. , instructions for an Intel chip). On machine learning, scikit. How can I accomplish this task to hiding the source code from the user but running the code perfectly with the same performance. I am developing a paid application in python. As a drawback, the fact that a Python based hydraulic solver will be slower compared to the highly efficient procedural C code EPANET is written in, has to be mentioned. The source code of this file is first compiled to byte code with extension ". Over the past twenty years, the OSI has worked to promote and protect open source software, development, and communities, championing software freedom in society through education, collaboration, and infrastructure, stewarding the Open Source Definition (OSD), and preventing abuse of the ideals and ethos inherent to the open source movement. Python interface¶ There is a number of technical possibilities to provide a Python interface to OOMMF; including wrapping up of the C++ source code in some way (SWIG, Boost, Cython, ) so that it can be interfaced and driven from a Python programme. Python Version 2 I have the choice of using copy_const_reference or return_internal_reference. How To Package Your Python Code¶ This tutorial aims to put forth an opinionated and specific pattern to make trouble-free packages for community use. (If you obtained bottleneck directly from the repository, then you will need to generate the C source files using the included Makefile which requires Cython. easily tune readable Python code into plain C performance by adding static type declarations, also in Python syntax. Starting the Python interactive interpreter. > > > > Is it possible to protect python source code by compiling it to. py code itself. KivyPie is a compact and lightweight Raspbian based distribution that comes with Kivy installed and ready to run. 6% increase over baseline. Transformations provided by most Python code obfuscators include: Rename your code's internally used identifiers (variable names, function names, class names, etc. Get up to speed with Cython 3. Using Cython in BGE is benefical in various ways, from executing heavy code faster to protecting your scripts by using compiled C extensions instead of your pure Python scripts. Cython increases the speed of a Python module by compiling a Python code to C. Use {} curly brackets to construct the dictionary, and [] square brackets to index it. One could also just compile the source to a. Expand your existing legacy applications in C using Python。Cython is a tool that makes writing C extensions to Python as easy as writing Python itself. 4, it is included by default with the Python binary installers. Another potential workaround is to use C-extenstion, or better known as Cython. Best Practices for Protecting Python Source Code. However, PyInstaller bundles compiled Python scripts (. Well, one good reason lots of people consider is to accelerate the speed of code process. Speakers get -25%, volunteers -50%, tutors of workshops over 2 hours and coorganizers who invested more than 8 hours get -100%. The Cython language is very close to the Python language, but Cython additionally supports calling C functions and declaring C types on variables and class attributes.