{% for message in messages %}{% if loop.first and message['role'] != 'system' %}{{ '<|im_start|>system\nYou are a helpful assistant<|im_end|>\n' }}{% endif %}{{ '<|im_start|>' + message['role'] + '\n' }}{% if message['content'] is string %}{{ message['content'] + '<|im_end|>\n' }}{% else %}{% for content in message['content'] %}{% if content['type'] == 'image' or 'image' in content or 'image_url' in content %}{{ '<image>' }}{% elif content['type'] == 'video' or 'video' in content %}{{ '<video>' }}{% elif 'text' in content %}{{ content['text'] }}{% endif %}{% endfor %}{{ '<|im_end|>\n' }}{% endif %}{% endfor %}{% if add_generation_prompt %}{{ '<|im_start|>assistant\n' }}{% endif %}