0a144688c6
Lets the user know if a file not found (OSError) occurs and prints the applied template on model load. Also fix some remaining references to fastchat. Signed-off-by: kingbri <bdashore3@proton.me>
41 lines
1.6 KiB
Python
41 lines
1.6 KiB
Python
import pathlib
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from functools import lru_cache
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from importlib.metadata import version as package_version
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from jinja2.sandbox import ImmutableSandboxedEnvironment
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from packaging import version
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from pydantic import BaseModel
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# Small replication of AutoTokenizer's chat template system for efficiency
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class PromptTemplate(BaseModel):
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name: str
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template: str
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def get_prompt_from_template(messages, prompt_template: PromptTemplate, add_generation_prompt: bool):
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if version.parse(package_version("jinja2")) < version.parse("3.0.0"):
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raise ImportError(
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"Parsing these chat completion messages requires jinja2 3.0.0 or greater. "
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f"Current version: {version('jinja2')}\n"
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"Please upgrade jinja by running the following command: "
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"pip install --upgrade jinja2"
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)
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compiled_template = _compile_template(prompt_template.template)
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return compiled_template.render(
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messages = messages,
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add_generation_prompt = add_generation_prompt
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)
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# Inspired from https://github.com/huggingface/transformers/blob/main/src/transformers/tokenization_utils_base.py#L1761
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@lru_cache
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def _compile_template(template: str):
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jinja_env = ImmutableSandboxedEnvironment(trim_blocks = True, lstrip_blocks = True)
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jinja_template = jinja_env.from_string(template)
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return jinja_template
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def get_template_from_file(prompt_template_name: str):
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with open(pathlib.Path(f"templates/{prompt_template_name}.jinja"), "r") as raw_template:
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return PromptTemplate(
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name = prompt_template_name,
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template = raw_template.read()
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)
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