INSTALLED_APPS = [

    'django.contrib.admin',

    'django.contrib.auth',

    'django.contrib.contenttypes',

    'django.contrib.sessions',

    'django.contrib.messages',

    'django.contrib.staticfiles',

    'crm', #这里未注册会报错：ImportError: No module named ‘MySQLdb'

]

import pymysql

pymysql.install_as_MySQLdb()