Python Flask:RQ Worker由于环境变量而引发KeyError

我正在尝试设置一个redis队列和一个worker，用我的flask应用程序处理队列。我实现这个是为了处理发送电子邮件的任务。我有点困惑，因为堆栈跟踪似乎表明我的“APP\u SETTINGS”环境变量在实际设置时没有设置

在启动应用程序、redis或worker之前，我设置了应用程序设置：

export APP_SETTINGS="project.config.DevelopmentConfig"

但是，当项目添加到队列中时，堆栈跟踪如下：

17:00:00 *** Listening on default...
17:00:59 default: project.email.sendMailInBG(<flask_mail.Message object at 0x7fc930e1c3d0>) (aacf9546-5558-4db8-9232-5f36c25d521b)
17:01:00 KeyError: 'APP_SETTINGS'
Traceback (most recent call last):
  File "/home/tony/pyp-launch/venv/local/lib/python2.7/site-packages/rq/worker.py", line 588, in perform_job
    rv = job.perform()
  File "/home/tony/pyp-launch/venv/local/lib/python2.7/site-packages/rq/job.py", line 498, in perform
    self._result = self.func(*self.args, **self.kwargs)
  File "/home/tony/pyp-launch/venv/local/lib/python2.7/site-packages/rq/job.py", line 206, in func
    return import_attribute(self.func_name)
  File "/home/tony/pyp-launch/venv/local/lib/python2.7/site-packages/rq/utils.py", line 150, in import_attribute
    module = importlib.import_module(module_name)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/home/tony/pyp-launch/project/__init__.py", line 24, in <module>
    app.config.from_object(os.environ['APP_SETTINGS'])
  File "/home/tony/pyp-launch/venv/lib/python2.7/UserDict.py", line 40, in __getitem__
    raise KeyError(key)
KeyError: 'APP_SETTINGS'
Traceback (most recent call last):
  File "/home/tony/pyp-launch/venv/local/lib/python2.7/site-packages/rq/worker.py", line 588, in perform_job
    rv = job.perform()
  File "/home/tony/pyp-launch/venv/local/lib/python2.7/site-packages/rq/job.py", line 498, in perform
    self._result = self.func(*self.args, **self.kwargs)
  File "/home/tony/pyp-launch/venv/local/lib/python2.7/site-packages/rq/job.py", line 206, in func
    return import_attribute(self.func_name)
  File "/home/tony/pyp-launch/venv/local/lib/python2.7/site-packages/rq/utils.py", line 150, in import_attribute
    module = importlib.import_module(module_name)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/home/tony/pyp-launch/project/__init__.py", line 24, in <module>
    app.config.from_object(os.environ['APP_SETTINGS'])
  File "/home/tony/pyp-launch/venv/lib/python2.7/UserDict.py", line 40, in __getitem__
    raise KeyError(key)
KeyError: 'APP_SETTINGS'
17:01:00 Moving job to u'failed' queue
17:01:00 
17:01:00 *** Listening on default...

worker.py

from flask.ext.mail import Message

from project import app, mail
from redis import Redis
from rq import use_connection, Queue

q = Queue(connection=Redis())


def send_email(to, subject, template, emailable):

    if emailable==True:   
        msg = Message(
            subject,
            recipients=[to],
            html=template,
            sender=app.config['MAIL_DEFAULT_SENDER']
        )
        q.enqueue(sendMailInBG, msg)

    else:
        print("no email sent, emailable set to: " + str(emailable))

def sendMailInBG(msgContent):

    with app.test_request_context():
        mail.send(msgContent)

import os

import redis
from rq import Worker, Queue, Connection

listen = ['default']

redis_url = os.getenv('REDISTOGO_URL', 'redis://localhost:6379')

conn = redis.from_url(redis_url)

if __name__ == '__main__':
    with Connection(conn):
        worker = Worker(list(map(Queue, listen)))
        worker.work()

---

我真的很想再多看一眼。我一辈子都搞不清楚这里发生了什么。

多亏了@danidee的提示，我发现每个终端都需要定义环境变量。因此，已为实际应用程序定义了应用程序设置，但未为工作程序定义

---

解决方案是在工作者终端中设置APP_设置

在我定义的终端中，

echo$APP\u设置的输出是什么？（venv）tony@tony-VirtualBox:~/pyp launch$echo$APP\u SETTINGS project.config.DevelopmentConfig。在另一个终端中，它为空，不确定原因。这是否需要在每个终端中定义？