Selecting external antenna on gpy

[kjm]

Can someone tell me how to select the external wifi antenna on the gpy pls?

from machine import Pin; from network import WLAN; WLAN.INT_ANT; WLAN.EXT_ANT
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Pin('P12', mode=Pin.OUT)(True); WLAN.INT_ANT; WLAN.EXT_ANT
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according to the docs P12 is supposed to change the antenna status