spark: add Python line counter snippet and verification result

wizard-work/spark/line_counter_result.txt

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+9541

wizard-work/spark/line_counter_snippet.py

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+#!/usr/bin/env python3
+"""Count lines of Python in a directory - verifiable snippet."""
+import os
+import sys
+
+def count_python_lines(directory: str) -> int:
+    """Return total lines of Python code in .py files under directory."""
+    total = 0
+    for root, _, files in os.walk(directory):
+        for f in files:
+            if f.endswith('.py'):
+                path = os.path.join(root, f)
+                with open(path, 'r', errors='ignore') as fh:
+                    total += sum(1 for line in fh if line.strip() and not line.strip().startswith('#'))
+    return total
+
+if __name__ == '__main__':
+    target = sys.argv[1] if len(sys.argv) > 1 else '.'
+    print(count_python_lines(target))