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Xiaobian to share with you what Cython is, I believe most people do not know how, so share this article for everyone's reference, I hope you have a lot of harvest after reading this article, let's go to understand it together!

1. What is Cython?

Cython is a programming language that uses Python like syntax to write C extensions and can be called by Python. It combines Python's fast development features with the ability to make code run as fast as C, and it's easy to call C libraries.

2. How to install Cython?

Unlike most Python libraries, Cython requires a C compiler and is configured differently on different platforms.

2.1 Configure gcc

windows

Install MingW-w64 compiler: conda install libpython m2w64-toolchain -c msys2

Find the\Lib\distutils folder in the Python installation path and create distutils.cfg Write the following:

[build] compiler=mingw32

macOS

Install XCode

linux:

gcc is generally configured, if not, execute this command: sudo apt-get install build-essential

2.2 Install cython library

If Anaconda is not installed: pip install cython

If Anaconda is installed: conda install cython

3. Cython on Jupyter Notebook

First load the Cython extension, using the magic command %load_ext Cython

Next run Cython code using magic command %%cython

%load_ext Cython

%%cython

#Sum natural numbers from 1 to-100

total = 0

for i in range(1, 101):

total += i

print(total)

5050

4. How fast is Cython?

Python function, runtime 261 ns

Cython function, runtime 44.1 ns

Running time is only about one-fifth of the original, the secret is that the parameter x uses a static type int, avoiding the time-consuming type checking.

4.1 Python function

def f(x):

return x ** 2 - x

%timeit f(100)

261 ns ± 8.78 ns per loop (mean ± std. dev. of 7 runs, 1000000 loops each)

4.2 Cython functions

%%cython

def g(int x):

return x ** 2 - x

%timeit g(100)

44.1 ns ± 1.09 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each)

The above is all the content of "Cython is what" this article, thank you for reading! I believe that everyone has a certain understanding, hope to share the content to help everyone, if you still want to learn more knowledge, welcome to pay attention to the industry information channel!

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