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feat: train with template #2951

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Merged
merged 4 commits into from
Jan 26, 2024
Merged

feat: train with template #2951

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e2d0b4b
init from train_baichuan.py
congchan Jan 24, 2024
e4850b2
feat: support model speific template
congchan Jan 24, 2024
0a4ff1a
feat: refactor to avoid modifying conversation class
congchan Jan 25, 2024
506c9a8
fix: remove changes in conversation.py
congchan Jan 25, 2024
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11 changes: 11 additions & 0 deletions fastchat/conversation.py
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,7 @@ class Conversation:
sep_style: SeparatorStyle = SeparatorStyle.ADD_COLON_SINGLE
sep: str = "\n"
sep2: str = None
prefix_token = ""
# Stop criteria (the default one is EOS token)
stop_str: Union[str, List[str]] = None
# Stops generation if meeting any token in this list
Expand All @@ -62,6 +63,7 @@ def get_prompt(self) -> str:
"""Get the prompt for generation."""
system_prompt = self.system_template.format(system_message=self.system_message)
if self.sep_style == SeparatorStyle.ADD_COLON_SINGLE:
self.prefix_token = self.roles[1] + ": "
ret = system_prompt + self.sep
for role, message in self.messages:
if message:
Expand All @@ -70,6 +72,7 @@ def get_prompt(self) -> str:
ret += role + ":"
return ret
elif self.sep_style == SeparatorStyle.ADD_COLON_TWO:
self.prefix_token = self.roles[1] + ": "
seps = [self.sep, self.sep2]
ret = system_prompt + seps[0]
for i, (role, message) in enumerate(self.messages):
Expand All @@ -79,6 +82,9 @@ def get_prompt(self) -> str:
ret += role + ":"
return ret
elif self.sep_style == SeparatorStyle.ADD_COLON_SPACE_SINGLE:
self.prefix_token = self.roles[1] + ": "
if self.sep2 is None:
self.sep2 = self.roles[0] + ": "
ret = system_prompt + self.sep
for role, message in self.messages:
if message:
Expand Down Expand Up @@ -125,6 +131,7 @@ def get_prompt(self) -> str:
ret += role + ":"
return ret
elif self.sep_style == SeparatorStyle.LLAMA2:
self.prefix_token = self.roles[1] + " "
seps = [self.sep, self.sep2]
if self.system_message:
ret = system_prompt
Expand Down Expand Up @@ -159,6 +166,9 @@ def get_prompt(self) -> str:
ret += f"{role}："
return ret
elif self.sep_style == SeparatorStyle.CHATML:
self.prefix_token = self.roles[1] + "\n"
if self.sep2 is None:
self.sep2 = self.sep
ret = "" if system_prompt == "" else system_prompt + self.sep + "\n"
for role, message in self.messages:
if message:
Expand Down Expand Up @@ -300,6 +310,7 @@ def copy(self):
sep_style=self.sep_style,
sep=self.sep,
sep2=self.sep2,
prefix_token=self.prefix_token,
stop_str=self.stop_str,
stop_token_ids=self.stop_token_ids,
)
Expand Down
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