You can't access outside private fields of a class. private fields are starting with __ .
for example -
class car:
def __init__(self):
self.__updatesoftware()
def drive(self):
print("driving")
def __updatesoftware(self):
print("updating software:")
obj = car()
obj.drive()
obj.__updatesoftware() ## here it will throw an error because
__updatesoftware is an private method.