Refactor code and improve performance

parse_excel.py

@@ -9,7 +9,7 @@
 
 parser = ArgumentParser(
     prog="parse Excel",
-    usage="python parse_excel.py --file <path to an Excel file>",
+    usage="python parse_excel.py --file path/to/excel/file",
     description="An Excel file that contains subnets",
     epilog="Enjoy the program! :)",
     allow_abbrev=True,
@@ -23,12 +23,14 @@
     action="store",
     type=str,
     required=True,
-    help="the path to an Excel file",
+    help="Path to an Excel file",
 )
 
 args = parser.parse_args()
 
 try:
-    svi_generator(excel_file=args.file)
+    f = svi_generator(excel_file=args.file)
 except (FileNotFoundError, PermissionError) as e:
     raise SystemExit(print(f"[red]{e}")) from e
+else:
+    print(f"\n[green]Created {f.name} in cwd", end="\n\n")

svi_generator.py

@@ -52,8 +52,8 @@ def svi_generator(excel_file: str) -> None:
     svi_cfg = template.render(vlans=vlans)
 
     # Export the template result to a text file
-    cfg_fname = f'{excel_file.replace(".xlsx", "")}_svi.txt'
-    with open(file=cfg_fname, mode="wt", encoding="utf-8") as cfg_file:
-        cfg_file.write(svi_cfg)
+    cfg_fname = f'{excel_file.replace(".xlsx", "")}_SVI-template.txt'
+    with open(file=cfg_fname, mode="wt+", encoding="utf-8") as f:
+        f.write(svi_cfg)
 
-    print(f"\n[green]Created {cfg_fname}", end="\n\n")
+    return f