How to debug httpbin?

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I’m trying to debug httpbin. I added debug=True in the app.run call but then when I run httpbin with python3.4 -m httpbin.core I get the following error:

 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
 * Restarting with stat
Traceback (most recent call last):
  File "/Users/0xced/Projects/httpbin/httpbin/core.py", line 24, in <module>
    from . import filters
SystemError: Parent module '' not loaded, cannot perform relative import

How can I debug httpbin and have descriptive error messages?

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So it turns out I just hit pallets/werkzeug#461. I tried various things suggested to workaround the problem but ultimately, the only thing that worked was to disable the reloader:

app.run(port=args.port, host=args.host, debug=True, use_reloader=False)

I’d still like to know if there’s a solution to debug httpbin with an active reloader.