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| """ |
| Updated chat template for Qwen3 that has {% generation %} tags inserted (required by Levanter). |
| """ |
|
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| QWEN_3_CHAT_TEMPLATE = r"""{%- if tools is defined and tools %} |
| {{- '<|im_start|>system\n' }} |
| {%- if messages[0].role == 'system' %} |
| {{- messages[0].content + '\n\n' }} |
| {%- endif %} |
| {{- "# Tools\n\nYou may call one or more functions to assist with the user query.\n\nYou are provided with function signatures within <tools></tools> XML tags:\n<tools>" }} |
| {%- for tool in tools %} |
| {{- "\n" }} |
| {{- tool | tojson }} |
| {%- endfor %} |
| {{- "\n</tools>\n\nFor each function call, return a json object with function name and arguments within <tool_call></tool_call> XML tags:\n<tool_call>\n{\"name\": <function-name>, \"arguments\": <args-json-object>}\n</tool_call><|im_end|>\n" }} |
| {%- else %} |
| {%- if messages[0].role == 'system' %} |
| {{- '<|im_start|>system\n' + messages[0].content + '<|im_end|>\n' }} |
| {%- endif %} |
| {%- endif %} |
| {%- set ns = namespace(multi_step_tool=true, last_query_index=messages|length - 1) %} |
| {%- for message in messages[::-1] %} |
| {%- set index = (messages|length - 1) - loop.index0 %} |
| {%- if ns.multi_step_tool and message.role == "user" and message.content is string and not(message.content.startswith('<tool_response>') and message.content.endswith('</tool_response>')) %} |
| {%- set ns.multi_step_tool = false %} |
| {%- set ns.last_query_index = index %} |
| {%- endif %} |
| {%- endfor %} |
| {%- for message in messages %} |
| {%- if message.content is string %} |
| {%- set content = message.content %} |
| {%- else %} |
| {%- set content = '' %} |
| {%- endif %} |
| {%- if (message.role == "user") or (message.role == "system" and not loop.first) %} |
| {{- '<|im_start|>' + message.role + '\n' + content + '<|im_end|>' + '\n' }} |
| {%- elif message.role == "assistant" %} |
| {%- set reasoning_content = '' %} |
| {%- if message.reasoning_content is string %} |
| {%- set reasoning_content = message.reasoning_content %} |
| {%- else %} |
| {%- if '</think>' in content %} |
| {%- set reasoning_content = content.split('</think>')[0].rstrip('\n').split('<think>')[-1].lstrip('\n') %} |
| {%- set content = content.split('</think>')[-1].lstrip('\n') %} |
| {%- endif %} |
| {%- endif %} |
| {%- if loop.index0 > ns.last_query_index %} |
| {%- if loop.last or (not loop.last and reasoning_content) %} |
| {{- '<|im_start|>' + message.role + '\n' }}{% generation %}{{- '<think>\n' + reasoning_content.strip('\n') + '\n</think>\n\n' + content.lstrip('\n') }}{% endgeneration %} |
| {%- else %} |
| {{- '<|im_start|>' + message.role + '\n' }}{% generation %}{{- content }}{% endgeneration %} |
| {%- endif %} |
| {%- else %} |
| {{- '<|im_start|>' + message.role + '\n' }}{% generation %}{{- content }}{% endgeneration %} |
| {%- endif %} |
| {%- if message.tool_calls %} |
| {%- for tool_call in message.tool_calls %} |
| {%- if (loop.first and content) or (not loop.first) %} |
| {% generation %}{{- '\n' }}{% endgeneration %} |
| {%- endif %} |
| {%- if tool_call.function %} |
| {%- set tool_call = tool_call.function %} |
| {%- endif %} |
| {% generation %}{{- '<tool_call>\n{"name": "' }} |
| {{- tool_call.name }} |
| {{- '", "arguments": ' }} |
| {%- if tool_call.arguments is string %} |
| {{- tool_call.arguments }} |
| {%- else %} |
| {{- tool_call.arguments | tojson }} |
| {%- endif %} |
| {{- '}\n</tool_call>' }}{% endgeneration %} |
| {%- endfor %} |
| {%- endif %} |
| {% generation %}{{- '<|im_end|>\n' }}{% endgeneration %} |
| {%- elif message.role == "tool" %} |
| {%- if loop.first or (messages[loop.index0 - 1].role != "tool") %} |
| {{- '<|im_start|>user' }} |
| {%- endif %} |
| {{- '\n<tool_response>\n' }} |
| {{- content }} |
| {{- '\n</tool_response>' }} |
| {%- if loop.last or (messages[loop.index0 + 1].role != "tool") %} |
| {{- '<|im_end|>\n' }} |
| {%- endif %} |
| {%- endif %} |
| {%- endfor %} |
| {%- if add_generation_prompt %} |
| {{- '<|im_start|>assistant\n' }} |
| {%- if enable_thinking is defined and enable_thinking is false %} |
| {% generation %}{{- '<think>\n\n</think>\n\n' }}{% endgeneration %} |
| {%- endif %} |
| {%- endif %}""" |
|
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