安装报错类型，解决方案；
1. 数据库连接报错
mysqldb只支持python2,pymysql支持3，都是使用c写的驱动，性能更好
# django中修改配置文件setting.py添加如下代码：
import pymysql
pymysql.install_as_MySQLdb()解决方案：
修改数据库：mysqldb=>pymysql
2. 因为切换数据库导致版本错误
raise ImproperlyConfigured('mysqlclient 1.3.13 or newer is required; you have %s.' % Database.__version__)
django.core.exceptions.ImproperlyConfigured: mysqlclient 1.3.13 or newer is required; you have 0.9.3.解决方案：
注释掉检测数据库版本的代码# "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/django/db/backends/mysql/base.py", line 36, in <module>
# if version < (1, 3, 13):
# raise ImproperlyConfigured('mysqlclient 1.3.13 or newer is required; you have %s.' % Database.__version__)
3. 切换数据库导致转码错误
"/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/django/db/backends/mysql/operations.py", line 146, in last_executed_query
query = query.decode(errors='replace')解决方案： ==暂时使用第二种类型==
- 修改decode为encode
- 把条件注释掉，防止出现不可预知的错误，这个错误很可能是python2中类型str和unicode的原因，python3中只有unicode类型数据
# "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/django/db/backends/mysql/operations.py", line 146
# if query is not None:
#query = query.encode(errors='replace')解决完成之后完美运行
