Method peek

source/python.js:22573–22583

(length)

    }

    peek(length) {
        const position = this._position;
        length = length === undefined ? this._length - this._position : length;
        this.skip(length);
        const end = this._position;
        this.skip(-length);
        if (position === 0 && length === this._length) {
            return this._buffer;
        }
        return this._buffer.subarray(position, end);
    }

    read(length) {
        const position = this._position;