Scan for Bluetooth device

[korenron]

Hello ,
I'm trying to scan for bluetooth devices around me
I'm using this simple code I have found here (

1	https://geektechstuff.com/2020/06/01/python-and-bluetooth-part-1-scanning-for-devices-and-services-python/

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# geektechstuff bluetooth   import bluetooth   def scan():       print("Scanning for bluetooth devices:")       devices = bluetooth.discover_devices(lookup_names = True, lookup_class = True)       number_of_devices = len(devices)       print(number_of_devices,"devices found")       for addr, name, device_class in devices:           print("\n")           print("Device:")           print("Device Name: %s" % (name))           print("Device MAC Address: %s" % (addr))           print("Device Class: %s" % (device_class))           print("\n")       return

when I run it it show me a list of devices my computer allready know and connect to them in the past
1. why is it ?
2. what do I need to in order to scan and see "Live" devices?

Thanks,