mol_ext no code selected output

Author: AnirudhG07

docs/source/auto.rst

@@ -70,7 +70,7 @@ All the commands will be saved to history and can be viewed using the
 the cache directory. See ``history`` docs for more information.
 
 Example for ``commands.txt`` file.
-==================================
+--------------------------------
 
 This file should be a simple ``.txt`` or non executable file. Here is an
 example containing various examples for you to run.

src/bept/pymol/mol_ext.py

@@ -59,6 +59,9 @@ def pymol_main(output_dir: str):
         ticked_indices=[0],
         maximal_count=len(pymol_code_opts),
     )
+    if not codes_selected:
+        CONSOLE.print("No code template selected.", style="yellow")
+        return
 
     for opt in codes_selected:
         code = pymol_code_opts[opt]