If you talk about Flutter, everyone will think of the following features:
I am currently studying. What I want to share today is a very convenient function in Flutter development: Hot Reload.
Read More »The most convenient features of Flutter: Hot Reload 
Recently, because I have been studying the interface of the program, I got many strange problems.
I want to record today is how to merge two pictures. I found that if I simply use the composite() function in PIL, the second picture will be overwritten by the first picture. So, I started to try convert the background of the second picture to transparent.
After converting the image to a transparent background, the result of the merging is quite natural to me.
I will start to introduce how to merge two pictures in below.
Read More »Use Python PIL module to merge two images
If we want to convert a picture background into transparent, we can use the Pillow package in Python to do it.
Read More »[Python] Use Pillow Package To Convert The Background Into Transparent 
Notepad++ is a free open source editor, published by GPL license and it have multi-language version. In addition to writing, it can also be used to write programs.
Read More »How to auto complete code in Notepad++ 
Today I used PyInstaller to package my Python program to execute file on Windows, I got an error message:
AttributeError: module 'win32ctypes.pywin32.win32api' has no attribute 'error'After I searching some information on Internet, I found it is a common problem about icon picture of our GUI program. The icon need to use the .ico file, but I use a .png file.
This icon is on the computer desktop dock, not the icon on the program window.
Read More »[Solved][Python] AttributeError: module ‘win32ctypes.pywin32.win32api’ has no attribute ‘error’ 
When we using PyQt5 framework to develop a GUI program, we usually need some icon to display our buttons or components. Many times we can load pictures from outside, but if we need common icons, such as play icon, close icon, minimum icon … etc, we can use the built-in icon picture from QStyle module.
This has another advantage: we don’t have to worry about pictures when packing the GUI program.
Below I will introduce how to use the icons in QStyle.
Read More »[PyQt5] Use icon from QStyle 
Hello! Today I want to record the “pickle” module in Python. The “pickle” module is very famous module in Python, its usage is like another Python package “Json”, it can compress the data and store it. If we want to load the data we store, we can easily call the “load()” function to restore our session.
Read More »How to use Pickle module to store data in Python Today when I was answering a question asked by a friend, I see a filter() function in my friend’s code, and my friend just asked me what was wrong with this paragraph.
This is a awkward question. I have been learning Python for two years, but I never used this function in my program.
Read More »[Python] How to use filter() function Whatever programming language we used, we always selected Json format to store our data.
Json (JavaScript Object Notation) is a lightweight data-interchange format, and it is readable and suitable for storing data. But in Python, sometimes we have performance bottlenecks in reading Json files, especially when the files are too large.
Read More »Using Python package “ujson” to increase Json processing speed 
I have learned about the database system and I know there are three types of database: