Error on running python sum.py

[hrsvrdhn]

This is a(n):

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• [ ] Update to an existing feature
• [x] Error
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Details:

Traceback (most recent call last): File "sum.py", line 9, in <module> import pysrt ImportError: No module named pysrt

I have installed pysrt but also this error is coming.

[HekarKET]

Try to install necessary libraries.