update skills

.agents/skills/spreadsheet/references/examples/openpyxl/read_existing_spreadsheet.py

@@ -0,0 +1,59 @@
+"""Read an existing .xlsx and print a small summary.
+
+If --input is not provided, this script creates a tiny sample workbook in /tmp
+and reads that instead.
+"""
+
+from __future__ import annotations
+
+import argparse
+import tempfile
+from pathlib import Path
+
+from openpyxl import Workbook, load_workbook
+
+
+def create_sample(path: Path) -> Path:
+    wb = Workbook()
+    ws = wb.active
+    ws.title = "Sample"
+    ws.append(["Item", "Qty", "Price"])
+    ws.append(["Apples", 3, 1.25])
+    ws.append(["Oranges", 2, 0.95])
+    ws.append(["Bananas", 5, 0.75])
+    ws["D1"] = "Total"
+    ws["D2"] = "=B2*C2"
+    ws["D3"] = "=B3*C3"
+    ws["D4"] = "=B4*C4"
+    wb.save(path)
+    return path
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description="Read an existing spreadsheet.")
+    parser.add_argument("--input", type=Path, help="Path to an .xlsx file")
+    args = parser.parse_args()
+
+    if args.input:
+        input_path = args.input
+    else:
+        tmp_dir = Path(tempfile.gettempdir())
+        input_path = tmp_dir / "sample_read_existing.xlsx"
+        create_sample(input_path)
+
+    wb = load_workbook(input_path, data_only=False)
+    print(f"Loaded: {input_path}")
+    print("Sheet names:", wb.sheetnames)
+
+    for name in wb.sheetnames:
+        ws = wb[name]
+        max_row = ws.max_row or 0
+        max_col = ws.max_column or 0
+        print(f"\n== {name} (rows: {max_row}, cols: {max_col})")
+        for row in ws.iter_rows(min_row=1, max_row=min(max_row, 5), max_col=min(max_col, 5)):
+            values = [cell.value for cell in row]
+            print(values)
+
+
+if __name__ == "__main__":
+    main()