I have been testing this script for some days , and it works very well if your wifi card have the capability to use injection .
There are multiple options in this script , you can jam all wifi in you area (where your wifi can reach) or you can jam a single Access point .
The good and the bad of this script in my opinion :

Good for :
-forcing owner of the AP you are jamming to restart the device by thinking that there is any issue with the hardware (good for APS with heavy wps protections that get locked after a few tries)

Bad :
Using it with bad intentions no one will be able to connect their wifis until the script is stopped , even yourself (in case of all networks around jamming)

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This is python 2 - which is EOL