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我解决了问题。问题的主要原因是我正在使用Python 3.7。但是，据我所知，Celery当前使用Python 3.6及更低版本。我对Celery代码进行了以下更改：
将“ C：\ Users \ myusername \ AppData \ Local \ Programs \ Python \ python37-32 \ lib \ site-packages \ celery \ backends \ async.py”重命名为“ C：\ Users \ myusername \ AppData \ Local \ Programs \ Python \ python37-32 \ lib \ site-packages \ celery \ backends \ asynchronous.py“
打开redis.py并将包含关键字“ async”的每一行更改为“ asynchronous”。
显然，
现在是Python 3中的关键字。
您也可以阅读此链接：https ://github.com/celery/celery/issues/4500
希望这个答案能对所有有相同问题的人有所帮助，直到发布新版本的Celery。
更新：这是Python 3.7的问题。您可以改用Python 3.6，而不会出现此类问题。但是，如果您想使用Python 3.7和celery [redis]进行连接，则可以使用上述解决方案来解决该问题。
我遵循了[ http://docs.celeryproject.org/en/latest/getting-started/first-steps-
with-celery.html ]中给出的所有步骤，这是代码：
from __future__ import absolute_import
from celery import Celery
#app = Celery('tasks',broker='pyamqp://guest@localhost//')
app = Celery('tasks',backend='redis://localhost',broker='pyamqp://guest@localhost//')
@app.task
def add(x,y):
return x + y
当我使用以下命令运行celery worker时
celery -A tasks worker --loglevel=info
我在设置后端时遇到语法错误。这是错误消息：
[2018-07-10 16:37:21,970: CRITICAL/MainProcess] Unrecoverable error: SyntaxError('invalid syntax',('c:\\users\\user_\\appdata\\local\\programs\\python\\python37-32\\lib\\site-packages\\celery\\backends\\redis.py',22,19,'from . import async,base\n'))Traceback (most recent call last): File "c:\users\user_\appdata\local\programs\python\python37-32\lib\site-packages\kombu\utils\objects.py",line 42,in __get__ return obj.__dict__[self.__name__] KeyError: 'backend' During handling of the above exception,another exception occurred: Traceback (most recent call last): File "c:\users\user_\appdata\local\programs\python\python37-32\lib\site-packages\celery\worker\worker.py",line 205,in start self.blueprint.start(self) File "c:\users\user_\appdata\local\programs\python\python37-32\lib\site-packages\celery\bootsteps.py",line 115,in start self.on_start() File "c:\users\user_\appdata\local\programs\python\python37-32\lib\site-packages\celery\apps\worker.py",line 139,in on_start self.emit_banner() File "c:\users\user_\appdata\local\programs\python\python37-32\lib\site-packages\celery\apps\worker.py",line 154,in emit_banner ' \n',self.startup_info(artlines=not use_image))),File "c:\users\user_\appdata\local\programs\python\python37-32\lib\site-packages\celery\apps\worker.py",line 217,in startup_info results=self.app.backend.as_uri(),File "c:\users\user_\appdata\local\programs\python\python37-32\lib\site-packages\kombu\utils\objects.py",line 44,in __get__ value = obj.__dict__[self.__name__] = self.__get(obj) File "c:\users\user_\appdata\local\programs\python\python37-32\lib\site-packages\celery\app\base.py",line 1196,in backend return self._get_backend() File "c:\users\user_\appdata\local\programs\python\python37-32\lib\site-packages\celery\app\base.py",line 914,in _get_backend self.loader) File "c:\users\user_\appdata\local\programs\python\python37-32\lib\site-packages\celery\app\backends.py",line 70,in by_url return by_name(backend,loader),url File "c:\users\user_\appdata\local\programs\python\python37-32\lib\site-packages\celery\app\backends.py",line 50,in by_name cls = symbol_by_name(backend,aliases) File "c:\users\user_\appdata\local\programs\python\python37-32\lib\site-packages\kombu\utils\imports.py",line 56,in symbol_by_name module = imp(module_name,package=package,**kwargs) File "c:\users\user_\appdata\local\programs\python\python37-32\lib\importlib\__init__.py",line 127,in import_module return _bootstrap._gcd_import(name[level:],package,level) File "<frozen importlib._bootstrap>",line 1006,in _gcd_import File "<frozen importlib._bootstrap>",line 983,in _find_and_load File "<frozen importlib._bootstrap>",line 967,in _find_and_load_unlocked File "<frozen importlib._bootstrap>",line 677,in _load_unlocked File "<frozen importlib._bootstrap_external>",line 724,in exec_module File "<frozen importlib._bootstrap_external>",line 860,in get_code File "<frozen importlib._bootstrap_external>",line 791,in source_to_code File "<frozen importlib._bootstrap>",line 219,in _call_with_frames_removed File "c:\users\user_\appdata\local\programs\python\python37-32\lib\site-packages\celery\backends\redis.py",line 22 from . import async,base ^ SyntaxError: invalid syntax
但是，当我使用注释行时，我没有问题，只是禁用了结果后端，我需要将结果后端设置为redis-server
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