Update app.py

app.py

@@ -270,7 +270,10 @@ if uploaded_files:
                                                 'Title' : concat['title'][0],
                                                 'Authors' : concat['authors'][0],
                                                 'Publication Year' :  get_valid_year(' '.join(concat['year_of_publication'].values.tolist())) if 'year_of_publication' in concat.columns else concat.assign(year_of_publication='')['year_of_publication'],
-                                                "Publisher Name" : concat['publisher_name'][0],
+                                                try:
+                                                    "Publisher Name" : concat['publisher_name'][0]
+                                                except:
+                                                    "Publisher Name" : ""
                                                 # 'Population' : concat['population_race'][0],
                                                 'Population' : upper_abbreviation(' '.join(concat['population_race'].values.tolist()).replace('Unknown', '').title()) if 'population_race' in concat.columns else concat.assign(population_race='')['population_race'],
                                                 'Sample Size' : sample_size_postproc(' '.join(concat['sample_size'].values.tolist()).replace('Unknown', '').title()) if 'sample_size' in concat.columns else concat.assign(sample_size='')['sample_size'],