fix bugs

cas12.py

@@ -175,13 +175,23 @@ def generate_genbank_file_from_data(formatted_data, gene_sequence, gene_symbol,
     record.annotations["molecule_type"] = "DNA"
     SeqIO.write(record, output_path, "genbank")
 
+
 def generate_bed_file_from_data(formatted_data, output_path):
     with open(output_path, 'w') as bed_file:
         for data in formatted_data:
-            chrom = data[0]
-            start = data[1]
-            end = data[2]
-            strand = data[3]
-            gRNA = data[5]
-            score = data[6]
-            bed_file.write(f"{chrom}\t{start}\t{end}\t{gRNA}\t{score}\t{strand}\n")
+            try:
+                # Ensure data has the expected number of elements
+                if len(data) < 7:
+                    raise ValueError("Incomplete data item")
+
+                chrom = data[0]
+                start = data[1]
+                end = data[2]
+                strand = '+' if data[3] == '+' else '-'
+                gRNA = data[5]
+                score = data[6]  # Ensure this index exists
+
+                bed_file.write(f"{chrom}\t{start}\t{end}\t{gRNA}\t{score}\t{strand}\n")
+            except ValueError as e:
+                print(f"Skipping an item due to error: {e}")
+                continue