forked from Archives/langchain
dbbc340f25
`langchain.prompts.PromptTemplate` and `langchain.prompts.FewShotPromptTemplate` do not validate `input_variables` when initialized as `jinja2` template. ```python # Using langchain v0.0.144 template = """"\ Your variable: {{ foo }} {% if bar %} You just set bar boolean variable to true {% endif %} """ # Missing variable, should raise ValueError prompt_template = PromptTemplate(template=template, input_variables=["bar"], template_format="jinja2", validate_template=True) # Extra variable, should raise ValueError prompt_template = PromptTemplate(template=template, input_variables=["bar", "foo", "extra", "thing"], template_format="jinja2", validate_template=True) ```
266 lines
7.9 KiB
Python
266 lines
7.9 KiB
Python
"""Test few shot prompt template."""
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from typing import Dict, List, Tuple
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import pytest
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from langchain.prompts.few_shot import FewShotPromptTemplate
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from langchain.prompts.prompt import PromptTemplate
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EXAMPLE_PROMPT = PromptTemplate(
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input_variables=["question", "answer"], template="{question}: {answer}"
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)
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@pytest.fixture()
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def example_jinja2_prompt() -> Tuple[PromptTemplate, List[Dict[str, str]]]:
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example_template = "{{ word }}: {{ antonym }}"
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examples = [
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{"word": "happy", "antonym": "sad"},
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{"word": "tall", "antonym": "short"},
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]
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return (
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PromptTemplate(
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input_variables=["word", "antonym"],
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template=example_template,
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template_format="jinja2",
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),
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examples,
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)
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def test_suffix_only() -> None:
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"""Test prompt works with just a suffix."""
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suffix = "This is a {foo} test."
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input_variables = ["foo"]
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prompt = FewShotPromptTemplate(
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input_variables=input_variables,
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suffix=suffix,
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examples=[],
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example_prompt=EXAMPLE_PROMPT,
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)
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output = prompt.format(foo="bar")
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expected_output = "This is a bar test."
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assert output == expected_output
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def test_prompt_missing_input_variables() -> None:
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"""Test error is raised when input variables are not provided."""
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# Test when missing in suffix
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template = "This is a {foo} test."
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with pytest.raises(ValueError):
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FewShotPromptTemplate(
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input_variables=[],
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suffix=template,
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examples=[],
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example_prompt=EXAMPLE_PROMPT,
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)
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# Test when missing in prefix
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template = "This is a {foo} test."
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with pytest.raises(ValueError):
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FewShotPromptTemplate(
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input_variables=[],
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suffix="foo",
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examples=[],
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prefix=template,
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example_prompt=EXAMPLE_PROMPT,
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)
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def test_prompt_extra_input_variables() -> None:
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"""Test error is raised when there are too many input variables."""
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template = "This is a {foo} test."
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input_variables = ["foo", "bar"]
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with pytest.raises(ValueError):
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FewShotPromptTemplate(
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input_variables=input_variables,
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suffix=template,
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examples=[],
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example_prompt=EXAMPLE_PROMPT,
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)
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def test_few_shot_functionality() -> None:
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"""Test that few shot works with examples."""
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prefix = "This is a test about {content}."
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suffix = "Now you try to talk about {new_content}."
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examples = [
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{"question": "foo", "answer": "bar"},
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{"question": "baz", "answer": "foo"},
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]
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prompt = FewShotPromptTemplate(
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suffix=suffix,
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prefix=prefix,
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input_variables=["content", "new_content"],
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examples=examples,
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example_prompt=EXAMPLE_PROMPT,
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example_separator="\n",
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)
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output = prompt.format(content="animals", new_content="party")
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expected_output = (
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"This is a test about animals.\n"
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"foo: bar\n"
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"baz: foo\n"
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"Now you try to talk about party."
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)
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assert output == expected_output
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def test_partial_init_string() -> None:
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"""Test prompt can be initialized with partial variables."""
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prefix = "This is a test about {content}."
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suffix = "Now you try to talk about {new_content}."
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examples = [
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{"question": "foo", "answer": "bar"},
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{"question": "baz", "answer": "foo"},
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]
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prompt = FewShotPromptTemplate(
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suffix=suffix,
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prefix=prefix,
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input_variables=["new_content"],
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partial_variables={"content": "animals"},
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examples=examples,
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example_prompt=EXAMPLE_PROMPT,
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example_separator="\n",
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)
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output = prompt.format(new_content="party")
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expected_output = (
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"This is a test about animals.\n"
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"foo: bar\n"
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"baz: foo\n"
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"Now you try to talk about party."
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)
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assert output == expected_output
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def test_partial_init_func() -> None:
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"""Test prompt can be initialized with partial variables."""
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prefix = "This is a test about {content}."
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suffix = "Now you try to talk about {new_content}."
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examples = [
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{"question": "foo", "answer": "bar"},
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{"question": "baz", "answer": "foo"},
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]
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prompt = FewShotPromptTemplate(
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suffix=suffix,
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prefix=prefix,
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input_variables=["new_content"],
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partial_variables={"content": lambda: "animals"},
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examples=examples,
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example_prompt=EXAMPLE_PROMPT,
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example_separator="\n",
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)
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output = prompt.format(new_content="party")
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expected_output = (
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"This is a test about animals.\n"
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"foo: bar\n"
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"baz: foo\n"
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"Now you try to talk about party."
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)
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assert output == expected_output
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def test_partial() -> None:
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"""Test prompt can be partialed."""
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prefix = "This is a test about {content}."
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suffix = "Now you try to talk about {new_content}."
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examples = [
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{"question": "foo", "answer": "bar"},
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{"question": "baz", "answer": "foo"},
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]
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prompt = FewShotPromptTemplate(
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suffix=suffix,
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prefix=prefix,
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input_variables=["content", "new_content"],
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examples=examples,
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example_prompt=EXAMPLE_PROMPT,
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example_separator="\n",
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)
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new_prompt = prompt.partial(content="foo")
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new_output = new_prompt.format(new_content="party")
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expected_output = (
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"This is a test about foo.\n"
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"foo: bar\n"
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"baz: foo\n"
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"Now you try to talk about party."
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)
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assert new_output == expected_output
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output = prompt.format(new_content="party", content="bar")
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expected_output = (
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"This is a test about bar.\n"
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"foo: bar\n"
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"baz: foo\n"
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"Now you try to talk about party."
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)
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assert output == expected_output
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def test_prompt_jinja2_functionality(
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example_jinja2_prompt: Tuple[PromptTemplate, List[Dict[str, str]]]
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) -> None:
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prefix = "Starting with {{ foo }}"
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suffix = "Ending with {{ bar }}"
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prompt = FewShotPromptTemplate(
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input_variables=["foo", "bar"],
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suffix=suffix,
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prefix=prefix,
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examples=example_jinja2_prompt[1],
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example_prompt=example_jinja2_prompt[0],
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template_format="jinja2",
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)
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output = prompt.format(foo="hello", bar="bye")
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expected_output = (
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"Starting with hello\n\n" "happy: sad\n\n" "tall: short\n\n" "Ending with bye"
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)
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assert output == expected_output
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def test_prompt_jinja2_missing_input_variables(
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example_jinja2_prompt: Tuple[PromptTemplate, List[Dict[str, str]]]
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) -> None:
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"""Test error is raised when input variables are not provided."""
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prefix = "Starting with {{ foo }}"
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suffix = "Ending with {{ bar }}"
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# Test when missing in suffix
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with pytest.raises(ValueError):
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FewShotPromptTemplate(
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input_variables=[],
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suffix=suffix,
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examples=example_jinja2_prompt[1],
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example_prompt=example_jinja2_prompt[0],
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template_format="jinja2",
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)
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# Test when missing in prefix
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with pytest.raises(ValueError):
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FewShotPromptTemplate(
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input_variables=["bar"],
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suffix=suffix,
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prefix=prefix,
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examples=example_jinja2_prompt[1],
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example_prompt=example_jinja2_prompt[0],
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template_format="jinja2",
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)
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def test_prompt_jinja2_extra_input_variables(
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example_jinja2_prompt: Tuple[PromptTemplate, List[Dict[str, str]]]
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) -> None:
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"""Test error is raised when there are too many input variables."""
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prefix = "Starting with {{ foo }}"
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suffix = "Ending with {{ bar }}"
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with pytest.raises(ValueError):
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FewShotPromptTemplate(
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input_variables=["bar", "foo", "extra", "thing"],
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suffix=suffix,
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prefix=prefix,
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examples=example_jinja2_prompt[1],
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example_prompt=example_jinja2_prompt[0],
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template_format="jinja2",
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)
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