Update app.py (#19)

- Update app.py (17707514a49a668d9212b39dc8c9d3efdaa26baf)


Co-authored-by: Yanis Adel <[email protected]>

app.py

@@ -18,6 +18,10 @@ def log_message(message: str):
 # --- Utilities ---
 def read_dna_sequence(dna_text, fasta_file):
     """
+    This function reads the DNA sequence, either from the text field or from the FASTA file,
+    and it checks the format.
+    It might return an error if the format of the FASTA file is incorrect.
+    
     Returns:
         dna_sequence: str
         warning: str if any
@@ -62,11 +66,21 @@ def read_dna_sequence(dna_text, fasta_file):
     return dna_sequence, warning.strip(), error
 
 
-def validate_inputs(dna_sequence, custom_question):
+def validate_inputs(dna_sequence: str, custom_question: str):
     """
+    This function is used to
+
+    Args:
+        dna_sequence (str): DNA sequence used by the user.
+            Note: It might be empty ("")
+
+        custom_question (str): Question of the user (in english).
+        
     Returns:
         valid: bool
+            Whether the input is valid (correct number of <DNA> tokens, etc)
         error: str
+            Error message if necessary
     """
     placeholders = custom_question.count("<DNA>")
 
@@ -198,6 +212,7 @@ You can either paste a sequence or upload a FASTA file.
 
 ### ❌ What will not work properly
 - "What is the length of this sequence `<DNA>`?"
+- "Replace the all 'A' nucleotides by 'G' in this sequence `<DNA>`.
 
 For more examples, you can refer to the [training dataset](https://huggingface.co/datasets/InstaDeepAI/ChatNT_training_data).
                 """