Test for missing data entry

[teapot]

If you make a variable, say called err, that's a string containing an error message you can do this near the start of your python_website_photos1 function:

Code:

    if err:
        pdb.gimp_message(err)
        return

The return stops your plugin from running.

Or perhaps you could have the error messages in a list, say called all_err, of strings. Then you could do:

Code:

    if all_err:
        pdb.gimp_message('\n'.join(all_err))
        return

You could try this in gimp's python console:
Filters -> Python-Fu -> Console

Code:

all_err = ['abc', 'def', 'ghi']
pdb.gimp_message('\n'.join(all_err))

You should get this: