mysql8 有新的安全要求，不能像之前的版本那样一次性创建用户并授权，需要先创建用户，再进行授权操作

1.创建数据库

CREATE DATABASE db_name CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;

2.创建用户：

create user 'username'@'host' …

1.server certificate verification failed

server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none

解决方案：

export GIT_SSL_NO_VERIFY=1 …

pip3 install opencv-python
pip3 install aircv

# -*- coding: utf-8 -*-

import aircv as ac …