How to initiate python program with a change in the input? - python

I have an application made in python, this application takes input from a separate text file called input.txt, i have to design the application in such a way that application runs automatically with any input to input.txt. Such that i need not go to command prompt and run the program, if i give the input, or change the text present in input.txt, python program should start execute automatically.
Please help me out with this :)
Thank you :) :)

You can run your program once and watch the filesystem changes for new or modified file. Try using python-inotify for linux:
https://github.com/seb-m/pyinotify

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[Desktop Entry]
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Terminal=true
Type=Application
Categories=Utility;Application;
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Hope this helps somebody else.

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