django.core.cache.backends.base.InvalidCacheBackendError: Could not find backend ‘django_redis.cache.RedisCache‘: cannot import name ‘six‘

pip3 install django==2.2.7

File "/usr/local/lib/python3.6/site-packages/django/db/backends/mysql/operations.py", line 146, in last_executed_query
query = query.decode(errors=‘replace‘)
AttributeError: ‘str‘ object has no attribute ‘decode‘

# 注意：这里每个人的路径可能不一样，需要根据报错自己看一下文件路径

vim /usr/local/lib/python3.6/site-packages/django/db/backends/mysql/operations.py

# 编辑文件，输入
:set number
i

# 找到146行，将 decode 改成 encode