[Tutor] download google contacts

[Atux Atux]

hi everyone.
i am new to the area of python and i have basic knowledge, so please bear
with me.
i am looking for a way to download only the contacts from my google account
and export them in my linux machine in a txt file, every12 hours with
cronjob and overwrite the old txt file.

let's make some assumptions for the sake of the example:
user: whatevertux
passwd: 123abcover
path of the txt file:/home/john/anyplace

some help please?

John