Update app.py

app.py

@@ -83,6 +83,10 @@ model.eval()
 
 # Define a function to process the DNA sequence
 def analyze_dna(sequence):
+
+    assert all(nucleotide in 'ACTGN' for nucleotide in sequence), "Sequence contains invalid characters"
+    assert len(sequence) >= 300, "Sequence needs to be at least 300 nucleotides long"
+
     # Preprocess the input sequence
     inputs = tokenizer(sequence, truncation=True, padding='max_length', max_length=512, return_tensors="pt", return_token_type_ids=False)