Python • Change sleep duration of a loop without restarting it (use a variable from an imported script?)

Code:

import timeimport sysimport RPi.GPIO as GPIOfrom hx711 import HX711import requestsfrom ShaneKeys import ARKEY1, SLEEPDURfrom gpiozero import LEDLED2 = LED(12) # Red LED to indicate low level.LED1 = LED(16) # Green LED to indicate high level.def cleanAndExit():    print("Cleaning...")            print("Bye!")    sys.exit()    LED1.on() # Indication that the program has started and that LED indications are functional.LED2.on() # Indication that the program has started and that LED indications are functional.hx = HX711(20, 21)hx.set_reading_format("MSB", "MSB")referenceUnit = 114hx.set_reference_unit(referenceUnit)hx.reset()hx.tare()LED2.off() # Indication that reset and tare functions are complete.time.sleep(5) # Take a moment to reflect. LED1.off() # Indication that reset and tare functions are complete.print("Scale has been set to zero, add weight now...")  # This is when I know that the "zero" or "calibration" is done.  If not using VNC, I use the LEDs to tell me when to load the load.while True:    try:        from ShaneKeys import SLEEPDUR        val = hx.get_weight(5)        wholeval = (val * -1)  # For some reason the "val" was reporting a negative value.  This makes it positive.        newval = wholeval / 100  # This makes the value in a unit of whole pounds (2154 becomes 21.54 pounds).        roundedval = round(newval, 2)  # This ensures that the pound value is limited to two decimal places.        print(roundedval)  # This displays the measured weight in pounds.        weight = str(roundedval)        if roundedval > 10:  # If the volume is greater than 25%, then power on the green LED on GPIO16.            LED2.off()            LED1.on()        else:  # If the volume is less than 25%, then power the red LED on GPIO12.            LED2.on()            LED1.off()        r = requests.post(ARKEY1 + "|water|" + str(roundedval)) #This is where the script sends the weight to my phone - the variable "roundedval" is the weight of the keg in pounds.        hx.power_down()        hx.power_up()        time.sleep(SLEEPDUR) #Sleep for XXX minutes then recheck the weight of the water.    except (KeyboardInterrupt, SystemExit):        cleanAndExit()