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Early installation vue cli installation sudo npm install -g @vue/cli function: vue ui The localhost:8000 page opens automatically mysql installation (optional) Download address: https://dev.mysql.com/downloads/mysql/5.6.html , find the appropriate dmg version to downloadClick dmg to install step by stepConfigure environment variables ( ...

Principle analysis of Spring circular dependency 1. What is circular dependency# When we use Spring, we inject another object into one object, but another object also contains the object. As shown in the figure: Student contains an attribute of teacher; The Teacher contains the attribute of student. This creates a circular dependency. 2. ...

abnormal 1. What is an exception An exception is a signal of a program error. Once an error occurs in the program, an exception will be generated. If it is not handled in the program, the exception will be thrown, and the operation of the program will be terminated. In Python, the exceptions triggered by errors are as follows There are t ...

Statement: This article was first published in my Zhihu article. Please state the source of the article according to the specifications. Thank you! After you complete the installation of xxx module with pip install xxx, you will find that it will automatically install the modules that xxx depends on. Finally, the following contents will ...

Recently, I bought a new headset. The store attached some non-destructive music resources of director Zhou. After receiving the goods, I couldn't wait to download and audition. I found that these resources were in wav format. After importing the player, the song title, author and album were all unknown. At that time, I wondered whether there wa ...

abstract Based on the prediction of the accommodation reservation results of new Airbnb users, this paper completely describes the whole process from data exploration to feature engineering to model construction. Project address: Airbnb New User Bookings | Kaggle Of which: 1. The data exploration part is mainly based on pandas library, using t ...

Function basis 1. Define function 1. What is a function concept A function is the encapsulation of the code that implements a specific function - > a function corresponds to a function (the function stored in the function) Classification (by who created the function) System functions - there are functions that have been created in Py ...

Implementation of semi-automatic scheduling system with python language 0. Why do you want to make this software? I believe that all dalaos engaged in personnel, especially store managers in store sales, should have experienced the pain of scheduling. It can be said that it is a mechanical, time-consuming and laborious work to collect the ...

In daily life, we often encounter the need to submit proof materials on the front and back of the ID card, and most of these websites only accept pdf format. At this time, we need to synthesize two pictures on the front and back of the ID card into a pdf file. Under the macOS system, the preview software can easily do this. At the same time, o ...

preface The main way to define objects in pydantic is through models (models inherit BaseModel). pydantic is mainly a parsing library, not a validation library. Verification is a means to achieve the goal: establish a model that conforms to the types and constraints provided. In other words, pydantic guarantees the types and constraints of t ...