1def handle_input(valid_types, *args, **kwargs):
 2    """Check if the types of the arguments are valid."""
 3    all_args = args + tuple(kwargs.values())
 4    for arg in all_args:
 5        if not isinstance(arg, valid_types):
 6            formatted_message = ', '.join([str(valid_type) for valid_type in valid_types])
 7            print(f'Invalid input arguments, expected {formatted_message}!')
 8            return
 9
10
11def handle_output(result, valid_types):
12    """Check if the type of the returned value is valid."""
13    if not isinstance(result, valid_types):
14        formatted_message = ', '.join([str(valid_type) for valid_type in valid_types])
15        print(f'Invalid output value, expected {formatted_message}!')
16
17
18def type_check(io_operation):
19    """Verify input and output of a function."""
20    def valid_types_wrapper(*valid_types):
21        def decorator(func):
22            def function_arguments_wrapper(*args, **kwargs):
23                if io_operation == 'in':
24                    handle_input(valid_types, *args, **kwargs)
25                result = func(*args, **kwargs)
26                if io_operation == 'out':
27                    handle_output(result, valid_types)
28                return result
29            return function_arguments_wrapper
30        return decorator
31    return valid_types_wrapper