chore: add swe bench example fetcher (#550)

# Motivation

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# Content

<!-- Please include a summary of the change -->

# Testing

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# Please check the following before marking your PR as ready for review

- [ ] I have added tests for my changes
- [ ] I have updated the documentation or added new documentation as
needed

Co-authored-by: jemeza-codegen <[email protected]>

Author: jayhack

src/codegen/extensions/langchain/utils.py

@@ -0,0 +1,67 @@
+"""Utilities for working with language models and datasets."""
+
+from dataclasses import dataclass
+from typing import Optional
+
+import requests
+
+
+@dataclass
+class SweBenchExample:
+    """A single example from the SWE-bench dataset."""
+
+    repo: str
+    instance_id: str
+    base_commit: str
+    patch: str
+    test_patch: str
+    problem_statement: str
+    hints_text: Optional[str]
+    created_at: str
+    version: str
+    fail_to_pass: str
+    pass_to_pass: Optional[str]
+    environment_setup_commit: Optional[str]
+
+
+def get_swe_bench_examples() -> list[SweBenchExample]:
+    """Fetch examples from the SWE-bench dataset.
+
+    Returns:
+        List of SweBenchExample objects
+
+    Raises:
+        requests.RequestException: If the API request fails
+    """
+    url = "https://datasets-server.huggingface.co/rows"
+    params = {
+        "dataset": "princeton-nlp/SWE-bench",
+        "config": "default",
+        "split": "dev",
+        "offset": 0,
+        "length": 100,
+    }
+
+    response = requests.get(url, params=params)
+    response.raise_for_status()
+    data = response.json()
+
+    examples = []
+    for row in data["rows"]:
+        example = SweBenchExample(
+            repo=row["row"]["repo"],
+            instance_id=row["row"]["instance_id"],
+            base_commit=row["row"]["base_commit"],
+            patch=row["row"]["patch"],
+            test_patch=row["row"]["test_patch"],
+            problem_statement=row["row"]["problem_statement"],
+            hints_text=row["row"].get("hints_text"),
+            created_at=row["row"]["created_at"],
+            version=row["row"]["version"],
+            fail_to_pass=row["row"]["FAIL_TO_PASS"],
+            pass_to_pass=row["row"].get("PASS_TO_PASS"),
+            environment_setup_commit=row["row"].get("environment_setup_commit"),
+        )
+        examples.append(example)
+
+    return examples