Add chatglm3 template

docs/source/examples/supported_conversation_template.md

@@ -20,12 +20,37 @@
 
 This template is not preseted in LMFlow currently. We are working on it and will update it soon.  
 ```
+**With a system message**
+```
+[gMASK]sop<|system|>\n {{system_message}}<|user|>\n {{user_message_0}}
+```
+
+**Without a system message**
+```
+[gMASK]sop<|user|>\n {{user_message_0}}
+```
+
+**A complete conversation**
+```
+[gMASK]sop<|system|>\n {{system_message}}<|user|>\n {{user_message_0}}<|assistant|>\n {{assistant_reply_0}}
+```
+
+**Multiple rounds**
+```
+[gMASK]sop<|system|>\n {{system_message}}<|user|>\n {{user_message_0}}<|assistant|>\n {{assistant_reply_0}}<|user|>\n {{user_message_1}}<|assistant|>\n {{assistant_reply_1}}
+```
+
 **jinja template**  
 [[Reference](https://huggingface.co/THUDM/chatglm3-6b/blob/103caa40027ebfd8450289ca2f278eac4ff26405/tokenizer_config.json#L42)]
 ```
 {% for message in messages %}{% if loop.first %}[gMASK]sop<|{{ message['role'] }}|>\n {{ message['content'] }}{% else %}<|{{ message['role'] }}|>\n {{ message['content'] }}{% endif %}{% endfor %}{% if add_generation_prompt %}<|assistant|>{% endif %}
 ```
 
+**Filled Example**
+```
+[gMASK]sop<|system|>\n You are a chatbot developed by LMFlow team.<|user|>\n Who are you?<|assistant|>\n I am a chatbot developed by LMFlow team.<|user|>\n How old are you?<|assistant|>\n I don't age like humans do. I exist as a piece of software, so I don't have a concept of age in the traditional sense.
+```
+
 
 ## ChatML
 **With a system message**

src/lmflow/utils/conversation_template/chatglm.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+# coding=utf-8
+# Copyright 2024 Statistics and Machine Learning Research Group. All rights reserved.
+from .base import StringFormatter, TemplateComponent, ConversationTemplate
+
+
+CHATGLM3_TEMPLATE = ConversationTemplate(
+    template_name='chatglm3',
+    user_formatter=StringFormatter(
+        template=[
+            TemplateComponent(type='string', content='<|user|>\n {{content}}')
+        ]
+    ),
+    assistant_formatter=StringFormatter(
+        template=[
+            TemplateComponent(type='string', content='<|assistant|>\n {{content}}')
+        ]
+    ),
+    system_formatter=StringFormatter(
+        template=[
+            TemplateComponent(type='string', content='<|system|>\n {{content}}')
+        ]
+    ),
+    special_starter=TemplateComponent(type='string', content='[gMASK]sop')
+)