def rep_default(x):
    """
    Returns the default representation of a python object
    "<{module}.{qualname} object at {hex(id(x))}>"
    
    example <function f at 0x7faeac0211e0> 
    """
    type_ = type(x)
    module = type_.__module__
    qualname = type_.__qualname__
    return f"<{module}.{qualname} object at {hex(id(x))}>"