Can I still check the results of CET-4 and CET-6 in this way? Python helps you install B in one step!!!

Pig brother 66 2020-11-13 07:32:57
check results cet-4 cet cet-6


Yesterday, there were a lot of students in the circle of friends show grade six results
One by one (sang) this (jin) optimal (tian) Show (liang)
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Of course, there are also sad friends
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For the old man above
I can only say : Coquette , brother
This kind of thing can catch up with , Must like

One 、 Demand analysis

When you brush your circle of friends , See a lot of students screenshots are not regular ( you 're right , Brother pig Virgo ), Some of the admission numbers haven't been mosaic , So brother pig was wondering if he could use Python Take a screenshot of your grade 4 or 6 , It's better to code automatically , This is not to be able to send directly to the circle of friends , Put it in place !( Others are showing results , You don't just show results , You can show Python)

Two 、 Functional design

Many students will imitate others' code , But I don't know how to do some small projects , In fact, the problem is : You don't know where to start

As a developer, I always meet the requirements in my work , So the first step of doing the project is : Figure out what you're going to do ( function ), And then we can de quantify the function , Step by step to achieve !

Next, let's see what interesting things to do today !

  1. Check the score : First we pass requests Library to learn information network query results
  2. Generate screenshots : After checking the result, a screenshot will be generated directly , The screenshot should only have the winning valid information
  3. Code : Code the examination permit number

3、 ... and 、 Technical realization

After defining the function to be done and quantifying the subdivision , We can start to knock code implementation , Here, we will follow the previous step-by-step implementation steps of subdivision !

1. Check the grade 4 and grade 6

First of all, we need to find four or six levels of query entry , First choice here Learning and information network :https://www.chsi.com.cn/cet/index.jsp

Then we call up the debug window , Enter the examination permit number and name . Remember to tick the... In the upper left corner Preserve log
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And then we can go in Network See that the first request is the request to get the results of level 4 and level 6
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Get URL We can start using requests Library simulation request , A very simple one post Method !
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Let's see the results , It's a html Webpage !
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2. Make web pages generate images

Here we will use a Software wkhtmltopdf, Note that this is a software, not python library , We need to install this software first !

Official website download address :https://wkhtmltopdf.org/downloads.html , Note that this website needs to be opened for download VPN, Otherwise download super slow !

Elder brother pig has already downloaded them in advance and put them on Baidu online disk :wkhtmltopdf Software download link :https://pan.baidu.com/s/11VOomkNch7C9m8lqlRaNAg password :4xuv
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Download and install it directly !

Windwos System students need to pay attention to : Need to put wkhtmltopdf Of bin The execution file path is added to PATH variable .
Windwos System students need to pay attention to : Need to put wkhtmltopdf Of bin The execution file path is added to PATH variable .
Windwos System students need to pay attention to : Need to put wkhtmltopdf Of bin The execution file path is added to PATH variable .

After the software download, we need one more Python library :imgkit.

Maybe some students will ask : Why download the software also under the library ? What's the relationship between the two ? This library actually It's like a wrapper for software , With this library, we can Call software directly with code , You don't need to open and use the software yourself as usual !

Installation Library :

pip install imgkit

take html Turn into png picture , It's just one step !

imgkit.from_file(‘cet.html’, ‘cet.png’)

notes : About imgkit library For more tutorials, see here :https://pypi.org/project/imgkit/

Let me see if the generated image is normal , As shown in the figure below, a completed screenshot of the web page is generated !
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Use this picture to send out friends circle. Others may scold you sb, Cutting such a big picture wastes other people's traffic !

The picture is too big , Let's try to cut the picture , Leave only the intermediate result information !

Image processing, of course, uses our classic pillow library

install :

pip install pillow

Cut the picture in three lines of code , Here we save the cut picture as cut_cet.png

# Cut pictures
img = Image.open('cet.png')
cropped = img.crop((310, 300, 700, 700)) # (left, upper, right, lower)
cropped.save("cut_cet.png")

Take a look at the screenshot , Such a picture is a qualified Python Pretend to be an engineer !
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3. Code

Why does brother pig want to code this anti male function ? The reason is that the test account of brother pig is also seen from the circle of friends , So I warn you : We must protect our privacy , You never know what other people will do with your data !

All right, back in the code , I'm going to continue to use our pillow library , In addition, we need a common library numpy library , These two libraries will often be used together . Because the picture is made up of many pixels , And each pixel is made up of rgb Numerical composition , So you can turn an image into a multidimensional array , therefore numpy library It's often used !

The principle of coding is to code the pixels of the area to be coded rgb Value modification

Let's take a look at the technical implementation of coding , Brother pig encapsulates the code as a method , It's universal , You can use it elsewhere !
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Here we just need to turn in the size of mosaic and the coordinate point to be coded , Let's see the end result !
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The red part of the picture above is painted by brother pig later , You can see The admission number has been used by brother pig Python Painting the evil mosaic !

Four 、 summary

Today's case is simple , But let us see Python Playability of , Apply technology to life , Pretend to be everywhere !

Source code :https://github.com/pig6/query_cet

版权声明
本文为[Pig brother 66]所创,转载请带上原文链接,感谢

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