imodelsX

Scikit-learn friendly library to interpret, and prompt-engineer text datasets using large language models.

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imodelsX is a Scikit-learn friendly library that provides tools for explaining, predicting, and steering text models/data. It also includes a collection of utilities for getting started with text data. **Explainable modeling/steering** | Model | Reference | Output | Description | |---|---|---|---| | Tree-Prompt | [Reference](https://github.com/microsoft/AugML/tree/main/imodelsX/tree_prompt) | Explanation + Steering | Generates a tree of prompts to steer an LLM (_Official_) | | iPrompt | [Reference](https://github.com/microsoft/AugML/tree/main/imodelsX/iprompt) | Explanation + Steering | Generates a prompt that explains patterns in data (_Official_) | | AutoPrompt | [Reference](https://github.com/microsoft/AugML/tree/main/imodelsX/autoprompt) | Explanation + Steering | Find a natural-language prompt using input-gradients (⌛ In progress)| | D3 | [Reference](https://github.com/microsoft/AugML/tree/main/imodelsX/d3) | Explanation | Explain the difference between two distributions | | SASC | [Reference](https://github.com/microsoft/AugML/tree/main/imodelsX/sasc) | Explanation | Explain a black-box text module using an LLM (_Official_) | | Aug-Linear | [Reference](https://github.com/microsoft/AugML/tree/main/imodelsX/aug_linear) | Linear model | Fit better linear model using an LLM to extract embeddings (_Official_) | | Aug-Tree | [Reference](https://github.com/microsoft/AugML/tree/main/imodelsX/aug_tree) | Decision tree | Fit better decision tree using an LLM to expand features (_Official_) | **General utilities** | Model | Reference | |---|---| | LLM wrapper| [Reference](https://github.com/microsoft/AugML/tree/main/imodelsX/llm) | Easily call different LLMs | | | Dataset wrapper| [Reference](https://github.com/microsoft/AugML/tree/main/imodelsX/data) | Download minimially processed huggingface datasets | | | Bag of Ngrams | [Reference](https://github.com/microsoft/AugML/tree/main/imodelsX/bag_of_ngrams) | Learn a linear model of ngrams | | | Linear Finetune | [Reference](https://github.com/microsoft/AugML/tree/main/imodelsX/linear_finetune) | Finetune a single linear layer on top of LLM embeddings | | **Related work** * [imodels package](https://github.com/microsoft/interpretml/tree/main/imodels) (JOSS 2021) - interpretable ML package for concise, transparent, and accurate predictive modeling (sklearn-compatible). * [Adaptive wavelet distillation](https://arxiv.org/abs/2111.06185) (NeurIPS 2021) - distilling a neural network into a concise wavelet model * [Transformation importance](https://arxiv.org/abs/1912.04938) (ICLR 2020 workshop) - using simple reparameterizations, allows for calculating disentangled importances to transformations of the input (e.g. assigning importances to different frequencies) * [Hierarchical interpretations](https://arxiv.org/abs/1807.03343) (ICLR 2019) - extends CD to CNNs / arbitrary DNNs, and aggregates explanations into a hierarchy * [Interpretation regularization](https://arxiv.org/abs/2006.14340) (ICML 2020) - penalizes CD / ACD scores during training to make models generalize better * [PDR interpretability framework](https://www.pnas.org/doi/10.1073/pnas.1814225116) (PNAS 2019) - an overarching framewwork for guiding and framing interpretable machine learning

README:

Scikit-learn friendly library to explain, predict, and steer text models/data.
Also a bunch of utilities for getting started with text data.

📖 demo notebooks

Explainable modeling/steering

Model	Reference	Output	Description
Tree-Prompt	🗂️, 🔗, 📄, 📖,	Explanation + Steering	Generates a tree of prompts to steer an LLM (Official)
iPrompt	🗂️, 🔗, 📄, 📖	Explanation + Steering	Generates a prompt that explains patterns in data (Official)
AutoPrompt	ㅤㅤ🗂️, 🔗, 📄	Explanation + Steering	Find a natural-language prompt using input-gradients (⌛ In progress)
D3	🗂️, 🔗, 📄, 📖	Explanation	Explain the difference between two distributions
SASC	ㅤㅤ🗂️, 🔗, 📄	Explanation	Explain a black-box text module using an LLM (Official)
Aug-Linear	🗂️, 🔗, 📄, 📖	Linear model	Fit better linear model using an LLM to extract embeddings (Official)
Aug-Tree	🗂️, 🔗, 📄, 📖	Decision tree	Fit better decision tree using an LLM to expand features (Official)
KAN	🗂️, 🔗, 📄, 📖	2-layer network	Fit 2-layer Kolmogorov-Arnold network

📖Demo notebooks 🗂️ Doc 🔗 Reference code 📄 Research paper ⌛ We plan to support other interpretable algorithms like RLPrompt, CBMs, and NBDT. If you want to contribute an algorithm, feel free to open a PR 😄

General utilities

Model	Reference
🗂️ LLM wrapper	Easily call different LLMs
🗂️ Dataset wrapper	Download minimially processed huggingface datasets
🗂️ Bag of Ngrams	Learn a linear model of ngrams
🗂️ Linear Finetune	Finetune a single linear layer on top of LLM embeddings

Quickstart

Installation: pip install imodelsx (or, for more control, clone and install from source)

Demos: see the demo notebooks

Natural-language explanations

Tree-prompt

from imodelsx import TreePromptClassifier
import datasets
import numpy as np
from sklearn.tree import plot_tree
import matplotlib.pyplot as plt

# set up data
rng = np.random.default_rng(seed=42)
dset_train = datasets.load_dataset('rotten_tomatoes')['train']
dset_train = dset_train.select(rng.choice(
    len(dset_train), size=100, replace=False))
dset_val = datasets.load_dataset('rotten_tomatoes')['validation']
dset_val = dset_val.select(rng.choice(
    len(dset_val), size=100, replace=False))

# set up arguments
prompts = [
    "This movie is",
    " Positive or Negative? The movie was",
    " The sentiment of the movie was",
    " The plot of the movie was really",
    " The acting in the movie was",
]
verbalizer = {0: " Negative.", 1: " Positive."}
checkpoint = "gpt2"

# fit model
m = TreePromptClassifier(
    checkpoint=checkpoint,
    prompts=prompts,
    verbalizer=verbalizer,
    cache_prompt_features_dir=None,  # 'cache_prompt_features_dir/gp2',
)
m.fit(dset_train["text"], dset_train["label"])


# compute accuracy
preds = m.predict(dset_val['text'])
print('\nTree-Prompt acc (val) ->',
      np.mean(preds == dset_val['label']))  # -> 0.7

# compare to accuracy for individual prompts
for i, prompt in enumerate(prompts):
    print(i, prompt, '->', m.prompt_accs_[i])  # -> 0.65, 0.5, 0.5, 0.56, 0.51

# visualize decision tree
plot_tree(
    m.clf_,
    fontsize=10,
    feature_names=m.feature_names_,
    class_names=list(verbalizer.values()),
    filled=True,
)
plt.show()

iPrompt

from imodelsx import explain_dataset_iprompt, get_add_two_numbers_dataset

# get a simple dataset of adding two numbers
input_strings, output_strings = get_add_two_numbers_dataset(num_examples=100)
for i in range(5):
    print(repr(input_strings[i]), repr(output_strings[i]))

# explain the relationship between the inputs and outputs
# with a natural-language prompt string
prompts, metadata = explain_dataset_iprompt(
    input_strings=input_strings,
    output_strings=output_strings,
    checkpoint='EleutherAI/gpt-j-6B', # which language model to use
    num_learned_tokens=3, # how long of a prompt to learn
    n_shots=3, # shots per example
    n_epochs=15, # how many epochs to search
    verbose=0, # how much to print
    llm_float16=True, # whether to load the model in float_16
)
--------
prompts is a list of found natural-language prompt strings

D3 (DescribeDistributionalDifferences)

from imodelsx import explain_dataset_d3
hypotheses, hypothesis_scores = explain_dataset_d3(
    pos=positive_samples, # List[str] of positive examples
    neg=negative_samples, # another List[str]
    num_steps=100,
    num_folds=2,
    batch_size=64,
)

SASC

Here, we explain a module rather than a dataset

from imodelsx import explain_module_sasc
# a toy module that responds to the length of a string
mod = lambda str_list: np.array([len(s) for s in str_list])

# a toy dataset where the longest strings are animals
text_str_list = ["red", "blue", "x", "1", "2", "hippopotamus", "elephant", "rhinoceros"]
explanation_dict = explain_module_sasc(
    text_str_list,
    mod,
    ngrams=1,
)

Aug-imodels

Use these just a like a scikit-learn model. During training, they fit better features via LLMs, but at test-time they are extremely fast and completely transparent.

from imodelsx import AugLinearClassifier, AugTreeClassifier, AugLinearRegressor, AugTreeRegressor
import datasets
import numpy as np

# set up data
dset = datasets.load_dataset('rotten_tomatoes')['train']
dset = dset.select(np.random.choice(len(dset), size=300, replace=False))
dset_val = datasets.load_dataset('rotten_tomatoes')['validation']
dset_val = dset_val.select(np.random.choice(len(dset_val), size=300, replace=False))

# fit model
m = AugLinearClassifier(
    checkpoint='textattack/distilbert-base-uncased-rotten-tomatoes',
    ngrams=2, # use bigrams
)
m.fit(dset['text'], dset['label'])

# predict
preds = m.predict(dset_val['text'])
print('acc_val', np.mean(preds == dset_val['label']))

# interpret
print('Total ngram coefficients: ', len(m.coefs_dict_))
print('Most positive ngrams')
for k, v in sorted(m.coefs_dict_.items(), key=lambda item: item[1], reverse=True)[:8]:
    print('\t', k, round(v, 2))
print('Most negative ngrams')
for k, v in sorted(m.coefs_dict_.items(), key=lambda item: item[1])[:8]:
    print('\t', k, round(v, 2))

KAN

import imodelsx
from sklearn.datasets import make_classification, make_regression
from sklearn.metrics import accuracy_score
import numpy as np

X, y = make_classification(n_samples=5000, n_features=5, n_informative=3)
model = imodelsx.KANClassifier(hidden_layer_size=64, device='cpu',
                               regularize_activation=1.0, regularize_entropy=1.0)
model.fit(X, y)
y_pred = model.predict(X)
print('Test acc', accuracy_score(y, y_pred))

# now try regression
X, y = make_regression(n_samples=5000, n_features=5, n_informative=3)
model = imodelsx.kan.KANRegressor(hidden_layer_size=64, device='cpu',
                                  regularize_activation=1.0, regularize_entropy=1.0)
model.fit(X, y)
y_pred = model.predict(X)
print('Test correlation', np.corrcoef(y, y_pred.flatten())[0, 1])

General utilities

Easy baselines

Easy-to-fit baselines that follow the sklearn API.

from imodelsx import LinearFinetuneClassifier, LinearNgramClassifier
# fit a simple one-layer finetune on top of LLM embeddings
m = LinearFinetuneClassifier(
    checkpoint='distilbert-base-uncased',
)
m.fit(dset['text'], dset['label'])
preds = m.predict(dset_val['text'])
acc = (preds == dset_val['label']).mean()
print('validation acc', acc)

LLM wrapper

Easy API for calling different language models with caching (much more lightweight than langchain).

import imodelsx.llm
# supports any huggingface checkpoint or openai checkpoint (including chat models)
llm = imodelsx.llm.get_llm(
    checkpoint="gpt2-xl",  # text-davinci-003, gpt-3.5-turbo, ...
    CACHE_DIR=".cache",
)
out = llm("May the Force be")
llm("May the Force be") # when computing the same string again, uses the cache

Data wrapper

API for loading huggingface datasets with basic preprocessing.

import imodelsx.data
dset, dataset_key_text = imodelsx.data.load_huggingface_dataset('ag_news')
# Ensures that dset has a split named 'train' and 'validation',
# and that the input data is contained for each split in a column given by {dataset_key_text}

Related work

imodels package (JOSS 2021 github) - interpretable ML package for concise, transparent, and accurate predictive modeling (sklearn-compatible).
Adaptive wavelet distillation (NeurIPS 2021 pdf, github) - distilling a neural network into a concise wavelet model
Transformation importance (ICLR 2020 workshop pdf, github) - using simple reparameterizations, allows for calculating disentangled importances to transformations of the input (e.g. assigning importances to different frequencies)
Hierarchical interpretations (ICLR 2019 pdf, github) - extends CD to CNNs / arbitrary DNNs, and aggregates explanations into a hierarchy
Interpretation regularization (ICML 2020 pdf, github) - penalizes CD / ACD scores during training to make models generalize better
PDR interpretability framework (PNAS 2019 pdf) - an overarching framewwork for guiding and framing interpretable machine learning

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