fixed iterate till first empty row

app.py

@@ -55,7 +55,7 @@ grading_criteria = st.text_area("Enter grading criteria or relevant marking info
 
 
 # Path to the example Excel file in the repository
-st.subheader("Specify Grading Criteria")
+st.subheader("Specify student IDs and page count")
 example_file_path ="example.xlsx"
 serve_excel_for_download(example_file_path)
 st.text("Please download the example Excel file to see the expected format. You will need to adjust the student IDs and page counts. Note that if you provide a grade and reason for a student, the system will not reassess that student's essay. Further, this will help te system make better assessments by calibrating it to your style of grading. Note that grade and reason must both be specified.")

src/main.py

@@ -17,10 +17,21 @@ def process_essays(images, question, guidelines, workbook):
     for col in range(1, sheet.max_column + 1):
         new_sheet.cell(row=1, column=col).value = sheet.cell(row=1, column=col).value
 
-    img_index = 0
+    # Find the first empty row in the student ID column
+    first_empty_row = None
+    for row in range(2, sheet.max_row + 1):
+        student_id = sheet.cell(row=row, column=1).value
+        if student_id is None:
+            first_empty_row = row
+            break
+    else:
+        # If no empty cell was found, set first_empty_row to max_row + 1 to process all rows
+        first_empty_row = sheet.max_row + 1
+
 
+    img_index = 0
     # First Pass: Transcribe missing texts
-    for row in range(2, sheet.max_row + 1):
+    for row in range(2, first_empty_row + 1):
         student_id = sheet.cell(row=row, column=1).value
         num_pages = sheet.cell(row=row, column=2).value
         transcribed_text = sheet.cell(row=row, column=3).value
@@ -47,7 +58,7 @@ def process_essays(images, question, guidelines, workbook):
 
     # Collect graded examples and initialize list
     examples = []
-    for row in range(2, sheet.max_row + 1):
+    for row in range(2, first_empty_row):
         student_id = sheet.cell(row=row, column=1).value
         transcribed_text = sheet.cell(row=row, column=3).value
         mark = sheet.cell(row=row, column=4).value
@@ -59,7 +70,7 @@ def process_essays(images, question, guidelines, workbook):
             examples.append({"essay": transcribed_text, "mark": mark, "reason": reason})
     
     # Second Pass: Grade missing grades/reasons
-    for row in range(2, sheet.max_row + 1):
+    for row in range(2, first_empty_row):
         student_id = sheet.cell(row=row, column=1).value
         transcribed_text = new_sheet.cell(row=row, column=3).value
         mark = sheet.cell(row=row, column=4).value