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Clean up internal column logic in _run_classifier_helper function #457

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Clean up internal column logic in _run_classifier_helper function #457

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5712395
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sarahyurick Dec 23, 2024
498910d
working code and pytest
sarahyurick Dec 24, 2024
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35 changes: 10 additions & 25 deletions nemo_curator/classifiers/base.py
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Original file line number Diff line number Diff line change
Expand Up @@ -121,44 +121,29 @@ def _run_classifier_helper(
prob_col: str = None,
) -> "dask_cudf.DataFrame":

keep_prob = prob_col is not None
prob_internal_col = "_prob"
# TODO: Make crossfit handle this cleanly
pred_internal_col = "labels"
df["sliced_text"] = df[text_field].str.slice(0, max_chars)
if prob_col:
df[prob_col] = 0
Comment on lines +124 to +125
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I wanted CrossFit to internally create the prob_col, but I was having trouble getting this to work. Specifically, I was able to get the entire classification pipeline to work, but then at the end prob_col would be dropped somewhere and not returned with the result.

else:
prob_col = "_prob"

columns_to_keep_list = df.columns.to_list()
columns_to_keep_list.remove("sliced_text")

classifier_pipe = op.Sequential(
op.Tokenizer(model, cols=["sliced_text"], tokenizer_type="default"),
op.Tokenizer(
model, cols=[text_field], tokenizer_type="default", max_chars=max_chars
),
op.Predictor(
model,
sorted_data_loader=True,
batch_size=batch_size,
pred_output_col=prob_internal_col,
pred_output_col=prob_col,
),
op.Labeler(labels, cols=[prob_col], suffix=label_col),
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Using suffix=label_col depends on rapidsai/crossfit#106.

repartition=df.npartitions,
keep_cols=columns_to_keep_list,
)
df = classifier_pipe(df)

# TODO: Make crossfit handle this cleanly
# to prevent the labeler from dropping the prob_internal_col
# and combine it into a single step
labeling_pipe = op.Sequential(
op.Labeler(labels, cols=[prob_internal_col]),
keep_cols=columns_to_keep_list + [prob_internal_col],
)
df = labeling_pipe(df)

if keep_prob:
df = df.rename(
columns={prob_internal_col: prob_col, pred_internal_col: label_col},
)
else:
df = df.rename(columns={pred_internal_col: label_col})
df = df.drop(columns=[prob_internal_col])

return df


Expand Down
41 changes: 25 additions & 16 deletions tests/test_classifiers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -12,8 +12,6 @@
# See the License for the specific language governing permissions and
# limitations under the License.

import os

import pytest
from distributed import Client

Expand Down Expand Up @@ -48,24 +46,35 @@ def domain_dataset():


@pytest.mark.gpu
def test_domain_classifier(gpu_client, domain_dataset):
@pytest.mark.parametrize("keep_prob", [True, False])
def test_domain_classifier(gpu_client, domain_dataset, keep_prob):
from nemo_curator.classifiers import DomainClassifier

classifier = DomainClassifier()
result_dataset = classifier(dataset=domain_dataset)
result_pred = result_dataset.df.compute()["domain_pred"]
if keep_prob:
prob_column = "domain_prob"
else:
prob_column = None

expected_pred = cudf.Series(
[
"Computers_and_Electronics",
"Finance",
"Health",
"Jobs_and_Education",
"Travel_and_Transportation",
]
)
classifier = DomainClassifier(prob_column=prob_column)
result_dataset = classifier(dataset=domain_dataset)

assert result_pred.equals(expected_pred)
if keep_prob:
result_df = result_dataset.df.compute()
assert "domain_prob" in result_df.columns
else:
result_pred = result_dataset.df.compute()["domain_pred"]

expected_pred = cudf.Series(
[
"Computers_and_Electronics",
"Finance",
"Health",
"Jobs_and_Education",
"Travel_and_Transportation",
]
)

assert result_pred.equals(expected_pred)


@pytest.mark.gpu
Expand Down
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