[PYTHON] The day you killed the process (flask gave an error saying Address already in use)

I got an error when I tried to start it. It seems that the specified process is already in use.

OSError: [Errno 98] Address already in use

Looking for process 
ps -fA | grep python

Bury anything

kill xxxx(Any)

reference

http://yusuke-ujitoko.hatenablog.com/entry/2018/07/14/144227 https://qiita.com/shuntaro_tamura/items/4016868bda604baeac3c

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