[21] data visualization: dynamic real-time large screen example based on Echarts + Python (Excel data source) - user analysis

catalogue ❤️ Effect display ❤️ 1. First look at the dynamic rendering   2. Rich theme styles I   Determine the demand scheme 1. Determine the screen LED resolution for product online deployment 2. Deployment mode   2, Overall architecture design 3, Coding implementation (based on length and readability, some key codes are ...

Posted by TheChief on Fri, 26 Nov 2021 16:43:47 -0800

Query of general mapper, such as selectByPrimaryKey, select, selectByExample, etc

Recently, there was a query using the general mapper of mybatis. Since I contacted the general mapper, I simply summarized the records so as to help later people. 1, First, put the interface code Mapper.class of mybatis general mapper: package tk.mybatis.mapper.common; import tk.mybatis.mapper.annotation.RegisterMapper; @RegisterMapper publ ...

Posted by einamiga on Sat, 20 Nov 2021 04:40:56 -0800

java to import and export excel, read object pictures, and upload qiniu cloud

java implementation of excel import and export and solution Because of the company's business requirements, excel uses the MultipartFile class to import and export tables , here are some key codes. I hope they can help //To obtain the input stream of excel file, it must be. Xlsx suffix. If it is xlsx suffix, use HSSFWorkBook X ...

Posted by erokar on Sun, 07 Nov 2021 13:25:03 -0800

Encyclopedia of commonly used data file storage formats in Python (latest / latest version in 2021)

Preface: there are various ways to save data. The simplest way is to directly save it as a text file, such as TXT, JSON, CSV, etc. in addition, Excel is also a popular storage format. Through this article, you will master how to operate Excel through some third-party libraries (xlrd/xlwt/pandas/openpyxl) to store and read data. This article is ...

Posted by CBR on Sun, 07 Nov 2021 12:13:55 -0800

EasyExcel third bullet + hutool POI are used together to export more complex Excel.xlsx + to calculate growth rate, year-on-year month on month ratio, proportion, etc

1, Review Following the last "dynamic header easyExcel import and export"( https://blog.csdn.net/qq_37337660/article/details/114680512)", And the last dynamic header import( https://blog.csdn.net/qq_37337660/article/details/110288393 )”After that. We have a third wave easyExcel Torture, this time export complex Excel, by the w ...

Posted by Rithiur on Thu, 04 Nov 2021 19:59:56 -0700

Getting started with POI and easyExcel

Use scenarios and versions Use scenarios Export information to excelEnter information from excel table into website database (exercise upload.) excel version Version 03 xls rows Max 65535 rowsVersion 07 xlsx has no limit on the number of rows One serious problem with POI is that it consumes a lot of memory EasyExcel is an open source exce ...

Posted by kwilder on Thu, 04 Nov 2021 14:29:56 -0700

Python handles Excel and learns these 14 methods to reduce the workload by more than half!

In the age of python, you have to learn some Python in finance, personnel, administration and other posts, which is easy and brain-saving! All operations are automatically implemented in Python, overtime? It doesn't exist! In fact, excel and python are both tools. We don't need to compare them and study which is easy to use. excel, as the most ...

Posted by z1haze on Sat, 16 Oct 2021 00:05:59 -0700

[EasyExcel tutorial] detailed explanation reading Excel -- Reading

  May you be like sunshine, bright and not sad.   1. Easyexcel & YuQue EasyExcel is an open source excel processing framework of Alibaba, which is famous for its simplicity and memory saving. This technology rewrites POI's analysis of 07 version excel, reduces the memory from 100 megabytes to KB level, and no memory overflow wil ...

Posted by Tibster on Mon, 11 Oct 2021 20:24:04 -0700

python_Interface Automated Test Framework

This article summarizes and introduces the development of interface test framework. The environment uses python3+selenium3+unittest+ddt+requests test framework and DDT data-driven, integrates test data functions such as Excel management test cases, and generates test reports using HTMLTestRunner. There are open source interface test tools such ...

Posted by newdles on Tue, 23 Jun 2020 16:54:17 -0700

PyQt5 detailed tutorial: pyqt programming based on PyQt5 QTdesigner (commonly used control, thread writing, and Matplotlib embedded in pyqt)

The biggest advantage of PyQt5 is that the interface can be made intuitively using qtdesigner, and then the code can be read directly, which saves the tedious steps of typesetting and so on, and the beauty of the interface is also beyond tk's reach. When using QTdesigner, it's better to layout the i ...

Posted by rayzun on Tue, 23 Jun 2020 03:59:09 -0700