There is no current event loop in thread 'Thread-1'

[autn]

Hi, I'm using Zyte API for my Django project, but when I use Zyte, I get There is no current event loop in thread 'xxx' error.

My code:

from zyte_api import ZyteAPI

def omnifollow_product_extract(product_url):
    zyte_api_key = os.environ.get("ZYTE_API_KEY", "")
    client = ZyteAPI(api_key=zyte_api_key)

[Gallaecio]

Could you provide instructions to generate a minimal, reproducible example?

[autn]

@Gallaecio let me provide an elementary example:
On my Django project:

• my_app/utils.py

from zyte_api import ZyteAPI

def omnifollow_product_extract(product_url):
    zyte_api_key = os.environ.get("ZYTE_API_KEY", "")  # or just set a static key
    client = ZyteAPI(api_key=zyte_api_key)

• my_app/urls.py

urlpatterns = [
    path("zyte-test/", views.zyte_test),
    ...
]

• my_app/views.py

from my_app.utils import omnifollow_product_extract

def zyte_test(request):
    omnifollow_product_extract("")
    return HttpResponse("success")

It's a basic way to use Zyte API? When I go to the view http://my_host/zyte-test/ I got this:

It looks like it's related to AsyncZyteAPI, but I want to use ZyteAPI only for my helper function.

[Gallaecio]

ZyteAPI uses AsyncZyteAPI underneath. Could it be that you are creating ZyteAPI in one thread and then using it from a different thread? It’s possible we did not account for that scenario (and we should).

In any case, I will try to reproduce this when I get a chance.

[Gallaecio]

I have tried reproducing your issue with this code base, but it seems to work. Could you create a PR against that repo with the necessary changes to reproduce your issue?

[lopuhin]

@autn does this happen when you do ./manage.py runserver or when you run the Django app in some other way?

[Gallaecio]

Oh, right, I used runserver.

[autn]

@lopuhin I used runserver
@Gallaecio thank you, I'll update the repo

[autn]

@Gallaecio looks like the issue happened on Python 3.8 and Django 2.2.19
Updated: I tried using Django 4.2 (the latest version supports Python 3.8) and got the same issue.

[autn]

@Gallaecio, I re-read the README and found that Python 3.9+ is required. However, I can install it on my old project, which uses Python 3.8, without the error/warning. Should we update the Python dependence to the library?

[Gallaecio]

You are right, we should probably add python_requires=">=3.9" to setup.py, since it seems at least 1 change in #76 could break stuff when using Python 3.8 or lower (if also using typing).

[autn]

@Gallaecio thanks for your support 💯 I will update my project!