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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_file_path_validator(default_file_param=None):
 """ Creates a namespace validator that splits out 'path' into 'directory_name' and 'file_name'. Allows another path-type parameter to be named which can supply a default filename. """


    def validator(namespace):
        if not hasattr(namespace, 'path'):
            return

        path = namespace.path
        dir_name, file_name = os.path.split(path) if path else (None, '')

        if default_file_param and '.' not in file_name:
            dir_name = path
            file_name = os.path.split(getattr(namespace, default_file_param))[1]
        namespace.directory_name = dir_name
        namespace.file_name = file_name
        del namespace.path

    return validator