fix: add pydoc stub for pyarrow compatibility

Signed-off-by: danbugs <danilochiarlone@gmail.com>

Author: danbugs

.github/workflows/benchmarks.yml

@@ -219,9 +219,10 @@ jobs:
           df = pd.DataFrame(np.random.randn(1000, 4), columns=list('ABCD'))
           print(df.describe())
           PYEOF
+          pyhl run /tmp/pandas_bench.py > /dev/null || { echo "FAIL: pandas smoke check failed"; exit 1; }
           times=()
           for i in $(seq 1 10); do
-            ms=$( { /usr/bin/time -f "%e" pyhl run /tmp/pandas_bench.py; } 2>&1 | tail -1 )
+            ms=$( { /usr/bin/time -f "%e" pyhl run /tmp/pandas_bench.py > /dev/null; } 2>&1 )
             ms_int=$(echo "$ms * 1000" | bc | cut -d. -f1)
             times+=($ms_int)
             echo "  run $i: ${ms_int}ms"

examples/python-agent-driver/Dockerfile

@@ -69,6 +69,7 @@ RUN PY_INC=$(python3.12 -c 'import sysconfig; print(sysconfig.get_path("include"
 FROM ${BASE} AS rootfs
 COPY --from=deps         /deps            /usr/local/lib/python3.12/site-packages
 COPY --from=driver-build /src/hl_pydriver /bin/hl_pydriver
+COPY pydoc_stub.py /usr/local/lib/python3.12/pydoc.py
 
 # Stage 4: pack CPIO.
 FROM alpine:3.20 AS cpio

examples/python-agent-driver/pydoc_stub.py

@@ -0,0 +1,11 @@
+"""Minimal pydoc stub — provides getdoc() for pyarrow's vendored docscrape."""
+
+def getdoc(obj):
+    try:
+        doc = obj.__doc__
+    except AttributeError:
+        return ''
+    if not doc:
+        return ''
+    import re
+    return re.sub('^ *\n', '', doc.rstrip())