def get_instances(self) -> list:
    '\n\t\tFunction that gets the instances that already exist in the file\n\t\t:return: existing instances, list\n\t\t'
    return list(self.content.keys())
Function that gets the instances that already exist in the file
:return: existing instances, list
def get_instances(self) -> list:
    '\n\t\tFunction that gets the instances that already exist in the file\n\t\t:return: existing instances, list\n\t\t'
    return list(self.content.keys())