def check_instance(obj, instances):
    """
    Check if an object is an instance of another object
    
    Parameters
        - obj (*object* ): Object to check
        - instances (*list* ): List of objects to crosscheck with obj
    
    Returns
        - is_instance (*bool* ): *True* if the obj is an instances of one of the objects in 
          the list, *False* otherwise
    """
    for i in instances:
        if obj is i:
            return False
    return True
