pycharm 默认的数据库是sqlite3
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}
1.第一步：把sqlite3改为mysql
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'day60',
        'USER':'root',
        'PASSWORD':'7344395',
        'PORT':'3306',
        'CHARSET':'utf8'
    }
}
2.第二步：代码声明
django默认的是mysqldb模块连接mysql,但是该模块的兼容性不好，需要
手动改为pymysql。
你需要告诉django不要用默认的mysqldb还是用pysql

#在项目名的init或任意应用名下的init文件中书写下面两句话
import pymysql
pymysql.install_as_MySQLdb()

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CSRF verification failed. Request aborted.

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Help
Reason given for failure:

    CSRF cookie not set.
    
In general, this can occur when there is a genuine Cross Site Request Forgery, or when Django's CSRF mechanism has not been used correctly. For POST forms, you need to ensure:

Your browser is accepting cookies.
The view function passes a request to the template's render method.
In the template, there is a {% csrf_token %} template tag inside each POST form that targets an internal URL.
If you are not using CsrfViewMiddleware, then you must use csrf_protect on any views that use the csrf_token template tag, as well as those that accept the POST data.
The form has a valid CSRF token. After logging in in another browser tab or hitting the back button after a login, you may need to reload the page with the form, because the token is rotated after a login.
You're seeing the help section of this page because you have DEBUG = True in your Django settings file. Change that to False, and only the initial error message will be displayed.

You can customize this page using the CSRF_FAILURE_VIEW setting.

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    # 'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

def login(request):
    # print(request.method) 返回请求的方式，是一个大写的字符串
    # print(request.POST)  返回的是一个字典，如下
    # <QueryDict: {'username': ['111'], 'password': ['111'], 'hobby': ['222']}>
    if request.method=="POST":
        username = request.POST.get('username')  # 只获取列表的最后一个元素
        print(f'用户名是：{username}')
        hobby= request.POST.getlist('hobby') # 获取一个列表 
        print(f'你的爱好是：{hobby}')  #返回的值是：你的爱好是：['111', '222', '333']
    return render(request, 'login.html')