giskard-evaluator / text_classification.py
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import json
import logging
import datasets
import huggingface_hub
import pandas as pd
from transformers import pipeline
def get_labels_and_features_from_dataset(dataset_id, dataset_config, split):
try:
ds = datasets.load_dataset(dataset_id, dataset_config)[split]
dataset_features = ds.features
labels = dataset_features["label"].names
features = [f for f in dataset_features.keys() if f != "label"]
return labels, features
except Exception as e:
logging.warning(
f"Failed to load dataset {dataset_id} with config {dataset_config}: {e}"
)
return None, None
def check_model(model_id):
try:
task = huggingface_hub.model_info(model_id).pipeline_tag
except Exception:
return None
try:
ppl = pipeline(task=task, model=model_id)
return ppl
except Exception:
return None
def text_classificaiton_match_label_case_unsensative(id2label_mapping, label):
for model_label in id2label_mapping.keys():
if model_label.upper() == label.upper():
return model_label, label
return None, label
def text_classification_map_model_and_dataset_labels(id2label, dataset_features):
id2label_mapping = {id2label[k]: None for k in id2label.keys()}
dataset_labels = None
for feature in dataset_features.values():
if not isinstance(feature, datasets.ClassLabel):
continue
if len(feature.names) != len(id2label_mapping.keys()):
continue
dataset_labels = feature.names
# Try to match labels
for label in feature.names:
if label in id2label_mapping.keys():
model_label = label
else:
# Try to find case unsensative
model_label, label = text_classificaiton_match_label_case_unsensative(
id2label_mapping, label
)
if model_label is not None:
id2label_mapping[model_label] = label
else:
print(f"Label {label} is not found in model labels")
return id2label_mapping, dataset_labels
"""
params:
column_mapping: dict
example: {
"text": "sentences",
"label": {
"label0": "LABEL_0",
"label1": "LABEL_1"
}
}
ppl: pipeline
"""
def check_column_mapping_keys_validity(column_mapping, ppl):
# get the element in all the list elements
column_mapping = json.loads(column_mapping)
if "data" not in column_mapping.keys():
return True
user_labels = set([pair[0] for pair in column_mapping["data"]])
model_labels = set([pair[1] for pair in column_mapping["data"]])
id2label = ppl.model.config.id2label
original_labels = set(id2label.values())
return user_labels == model_labels == original_labels
"""
params:
column_mapping: dict
dataset_features: dict
example: {
'text': Value(dtype='string', id=None),
'label': ClassLabel(names=['negative', 'neutral', 'positive'], id=None)
}
"""
def infer_text_input_column(column_mapping, dataset_features):
# Check whether we need to infer the text input column
infer_text_input_column = True
feature_map_df = None
if "text" in column_mapping.keys():
dataset_text_column = column_mapping["text"]
if dataset_text_column in dataset_features.keys():
infer_text_input_column = False
else:
logging.warning(f"Provided {dataset_text_column} is not in Dataset columns")
if infer_text_input_column:
# Try to retrieve one
candidates = [
f for f in dataset_features if dataset_features[f].dtype == "string"
]
feature_map_df = pd.DataFrame(
{"Dataset Features": [candidates[0]], "Model Input Features": ["text"]}
)
if len(candidates) > 0:
logging.debug(f"Candidates are {candidates}")
column_mapping["text"] = candidates[0]
return column_mapping, feature_map_df
"""
params:
column_mapping: dict
id2label_mapping: dict
example:
id2label_mapping: {
'negative': 'negative',
'neutral': 'neutral',
'positive': 'positive'
}
"""
def infer_output_label_column(
column_mapping, id2label_mapping, id2label, dataset_labels
):
# Check whether we need to infer the output label column
if "data" in column_mapping.keys():
if isinstance(column_mapping["data"], list):
# Use the column mapping passed by user
for user_label, model_label in column_mapping["data"]:
id2label_mapping[model_label] = user_label
elif None in id2label_mapping.values():
column_mapping["label"] = {i: None for i in id2label.keys()}
return column_mapping, None
if "data" not in column_mapping.keys():
# Column mapping should contain original model labels
column_mapping["label"] = {
str(i): id2label_mapping[label]
for i, label in zip(id2label.keys(), dataset_labels)
}
# print('>>>>> column_mapping >>>>>', column_mapping)
id2label_df = pd.DataFrame(
{
"Dataset Labels": dataset_labels,
"Model Prediction Labels": [
id2label_mapping[label] for label in dataset_labels
],
}
)
return column_mapping, id2label_df
def check_dataset_features_validity(d_id, config, split):
# We assume dataset is ok here
ds = datasets.load_dataset(d_id, config)[split]
try:
dataset_features = ds.features
except AttributeError:
# Dataset does not have features, need to provide everything
return None, None
# Load dataset as DataFrame
df = ds.to_pandas()
return df, dataset_features
def get_example_prediction(ppl, dataset_id, dataset_config, dataset_split):
# get a sample prediction from the model on the dataset
prediction_input = None
prediction_result = None
try:
# Use the first item to test prediction
ds = datasets.load_dataset(dataset_id, dataset_config)[dataset_split]
if "text" not in ds.features.keys():
# Dataset does not have text column
prediction_input = ds[0][ds.features.keys()[0]]
else:
prediction_input = ds[0]["text"]
print("prediction_input", prediction_input)
results = ppl(prediction_input, top_k=None)
# Display results in original label and mapped label
prediction_result = {
f'{result["label"]}': result["score"] for result in results
}
except Exception:
# Pipeline prediction failed, need to provide labels
return prediction_input, None
return prediction_input, prediction_result
def get_sample_prediction(ppl, df, column_mapping, id2label_mapping):
# get a sample prediction from the model on the dataset
prediction_input = None
prediction_result = None
try:
# Use the first item to test prediction
prediction_input = df.head(1).at[0, column_mapping["text"]]
results = ppl({"text": prediction_input}, top_k=None)
prediction_result = {
f'{result["label"]}': result["score"] for result in results
}
except Exception:
# Pipeline prediction failed, need to provide labels
return prediction_input, None
# Display results in original label and mapped label
prediction_result = {
f'{result["label"]}(original) - {id2label_mapping[result["label"]]}(mapped)': result[
"score"
]
for result in results
}
return prediction_input, prediction_result
def text_classification_fix_column_mapping(column_mapping, ppl, d_id, config, split):
# load dataset as pd DataFrame
# get features column from dataset
df, dataset_features = check_dataset_features_validity(d_id, config, split)
column_mapping, feature_map_df = infer_text_input_column(
column_mapping, dataset_features
)
if feature_map_df is None:
# dataset does not have any features
return None, None, None, None, None
# Retrieve all labels
id2label = ppl.model.config.id2label
# Infer labels
id2label_mapping, dataset_labels = text_classification_map_model_and_dataset_labels(
id2label, dataset_features
)
column_mapping, id2label_df = infer_output_label_column(
column_mapping, id2label_mapping, id2label, dataset_labels
)
if id2label_df is None:
# does not able to infer output label column
return column_mapping, None, None, None, feature_map_df
# Get a sample prediction
prediction_input, prediction_result = get_sample_prediction(
ppl, df, column_mapping, id2label_mapping
)
if prediction_result is None:
# does not able to get a sample prediction
return column_mapping, prediction_input, None, id2label_df, feature_map_df
return (
column_mapping,
prediction_input,
prediction_result,
id2label_df,
feature_map_df,
)