Python help what am i missing

Winging this python stuff

I have

BATTERY_LIST_NEW = ['Dryer Door Battery Level:--', 'Dimmer Switch Battery Level:690 day(s)']

and i can do this

hass.states.set(sensorName , 'on' ,
  {
    "friendly_name" : "{} {}".format("Battery","States") ,
    "Dryer Door Battery Level": "--",
    "Dimmer Switch Battery Level" : "690 day(s)",
    "icon" : "mdi:calendar-star" 
  }
)

I get

image

HAPPY CAMPER

NOW so want to add the BATTERY_LIST_NEW to the sensor

hass.states.set(sensorName , 'on' ,
  {
    "friendly_name" : "{} {}".format("Battery","States") ,
    for battery in BATTERY_LIST_NEW:
      aa = battery.split(":")
      # what do put here I know aa[0] = battery name and aa[1] = has the day count
      # just dont know how to write it here.
    "icon" : "mdi:calendar-star" 
  }
)

have i mis the bus on this

Work it out know what i did wrong will update you when I finish it