Update app.py

app.py

@@ -15,6 +15,7 @@ from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle
 from reportlab.lib import colors
 from reportlab.pdfbase import pdfmetrics
 from reportlab.pdfbase.ttfonts import TTFont
+from reportlab.pdfgen import canvas  # Ensure this import is present
 from datetime import datetime
 import pytz
 from pypdf import PdfReader, PdfWriter
@@ -345,7 +346,7 @@ def create_and_link_pdfs(source_pdf="TestSource.pdf", target_pdf="TestTarget.pdf
     """Create two PDFs with numbered lists, add links and bookmarks."""
     def create_base_pdf(filename):
         buffer = io.BytesIO()
-        c = canvas.Canvas(buffer)
+        c = canvas.Canvas(buffer)  # Correct usage of canvas
         c.setFont("Helvetica", 12)
         for i, word in enumerate(WORDS, 1):
             y = 800 - (i * 20)
@@ -375,7 +376,7 @@ def create_and_link_pdfs(source_pdf="TestSource.pdf", target_pdf="TestTarget.pdf
         for page in reader.pages:
             writer.add_page(page)
         buffer = io.BytesIO()
-        c = canvas.Canvas(buffer)
+        c = canvas.Canvas(buffer)  # Correct usage of canvas
         c.setFont("Helvetica", 8)
         seven_y = 800 - (7 * 20)
         c.drawString(90, seven_y - 5, "link")
@@ -385,15 +386,13 @@ def create_and_link_pdfs(source_pdf="TestSource.pdf", target_pdf="TestTarget.pdf
         text_pdf = PdfReader(buffer)
         page = writer.pages[0]
         page.merge_page(text_pdf.pages[0])
-        # Create a URI action dictionary
         uri_action = DictionaryObject({
             NameObject("/S"): NameObject("/URI"),
             NameObject("/URI"): TextStringObject(f"file://{os.path.abspath(target)}#page=1")
         })
-        # Create the link annotation with the URI action
         link = Link(
             rect=(90, seven_y - 10, 150, seven_y + 10),
-            **{"/A": uri_action}  # Add the action dictionary directly
+            **{"/A": uri_action}
         )
         writer.add_annotation(page_number=0, annotation=link)
         with open(source, "wb") as f: