ImportError: No module named ‘MySQLdb'

1.APP未注册

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'
]

2.对应项目下：__init__.py

import pymysql

pymysql.install_as_MySQLdb()