[SOLVED] How to run a python script like pm2 for nodejs

Issue

I've used pm2 for my Node.js script and I love it.
Now I have a python script which collect streaming data on EC2. Sometimes the script bombs out and I would like a process manager to restart itself like pm2.

Is there something the same as pm2 for python? I've been searching around and couldn't find anything.

Here's my error

  File "/usr/local/lib/python2.7/dist-packages/tweepy/streaming.py", line 430, in filter
    self._start(async)
  File "/usr/local/lib/python2.7/dist-packages/tweepy/streaming.py", line 346, in _start
    self._run()
  File "/usr/local/lib/python2.7/dist-packages/tweepy/streaming.py", line 286, in _run
    raise exception
AttributeError: 'NoneType' object has no attribute 'strip'
/usr/local/lib/python2.7/dist-packages/requests/packages/urllib3/util/ssl_.py:90:

It's a simple data collecting script

class StdOutListener(StreamListener):

    def on_data(self, data):
        mydata = json.loads(data)
        db.raw_tweets.insert_one(mydata)
        return True

    def on_error(self, status):
        mydata = json.loads(status)
        db.error_tweets.insert_one(mydata)


if __name__ == '__main__':

    #This handles Twitter authetification and the connection to Twitter Streaming API
    l = StdOutListener()
    auth = OAuthHandler(consumer_key, consumer_secret)
    auth.set_access_token(access_token, access_token_secret)
    stream = Stream(auth, l)

    #This line filter Twitter Streams to capture data by the keywords: 'python', 'javascript', 'ruby'
    stream.filter(follow=[''])

That I would like it to just restart itself in case something happens.

Solution

UPD: See answers below for better solutions.

--

There are several solutions for that. First, you may use http://supervisord.org/ which is a decent universal process controll system, which includes a lot of features out of the box, such as autorestart, restart counter, logging, flexible configuration and more.

Beyond that, you may just wrap your implementation logic into a function, run it within try except block, catch all exceptions and when an exception is cought, run the function again instead of exiting the script. In your case such function might include creating listener, authentication and stream part.

Answered By - abcdn

Answer Checked By - Senaida (WPSolving Volunteer)