def filter_value_to_python(value):
    """
    Turn the string `value` into a python object.
    >>> filter_value_to_python([1, 2, 3])
    [1, 2, 3]
    >>> filter_value_to_python(123)
    123
    >>> filter_value_to_python('true')
    True
    >>> filter_value_to_python('False')
    False
    >>> filter_value_to_python('null')
    >>> filter_value_to_python('None')
    >>> filter_value_to_python('Ø')
    u'O'
    """
    if isinstance(value, list):
        return value
    if isinstance(value, int):
        return value
    if value in ['true', 'True', True]:
        value = True
    elif value in ['false', 'False', False]:
        value = False
    elif value in ('null', 'none', 'None', None):
        value = None
    return value
