报错1 - TypeError:can only concatenate list (not ‘tuple’) to list

参考：

https://stackoverflow.com/questions/49085230/django-celery-typeerror-can-only-concatenate-tuple-not-nonetype-to-tuple
http://docs.celeryproject.org/en/latest/django/first-steps-with-django.html

解决：
将 djcelery\management\commands\celery.py 中的 options 部分注释掉

报错2 - from kombu.async.timer import Entry, Timer as Schedule, to_timestamp, logger SyntaxError: invalid syntax

参考

https://stackoverflow.com/questions/53466160/unable-to-start-celery-worker-instance-syntax-error

原因是版本冲突。要降低版本

降低python版本

报错3 - Running a worker with superuser privileges when the worker accepts messages serialized with pickle is a very bad idea!

如果使用root用户启动celery会遇到下面的问题

from celery import Celery, platforms

platforms.C_FORCE_ROOT = True  #加上这一行
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错误4 - from . import async, base SyntaxError: invalid syntax错误

参考：

链接:https://github.com/celery/celery/issues/4849

解决：

pip install --upgrade https://github.com/celery/celery/tarball/master
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错误5 - django.core.exceptions.ImproperlyConfigured: SQLite 3.8.3 or later is required (found 3.7.17).

错误解决：

1. 首先到系统根目录

   cd /
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2. 然后查找django

   find -name django
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   因为我实在虚拟环境cel下开发本项目，所以我django再上图所示的路径中。

3. 编辑该路径下的/db/backends/sqlite3/base.py文件

   vim ./root/.local/share/virtualenvs/cel-l64ISTw0/lib/python3.7/site-packages/django/db/backends/sqlite3/base.py
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   找到check_sqlite_version()方法，注释掉里面的报错代码

   def check_sqlite_version():
      pass
   	# if Database.sqlite_version_info < (3, 8, 3):
   	
   	# raise ImproperlyConfigured('SQLite 3.8.3 or later is required (found %s).' % Database.sqlite_version)
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重新运行项目

python manage.py runserver
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访问http:127.0.0.1:8000/

错误6 - AttributeError: ‘str’ object has no attribute ‘items’

原因：
redis版本问题
解决：回滚到旧版本

pip install redis==2.10.6
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