n encoded to the underlying
        file using file_encoding. The intermediate data type
        will usually be Unicode but depends on the specified codecs.

        Bytes read from the file are decoded using file_encoding and then
        passed back to the caller encoded using data_encoding.

        If file_encoding is not given, it defaults to data_encoding.

        errors may be given to define the error handling. It defaults
        to 'strict' which causes ValueErrors to be raised in case an
        encoding error occurs.

        The returned wrapped file object provides two extra attributes
        .data_encoding and .file_encoding which reflect the given
        parameters of the same name. The attributes can be used for
        introspection by Python programs.

    N)r