fixed pdf file reader

src/slider/slide.py

@@ -132,8 +132,8 @@ def set_svg_background_images(lecture_tex, verbose=False,
     import PyPDF2 # Import PyPDF2 here. There is a strange issue (possibly bad package version?) which makes it inappropriate as a top-level import (CI/CD Breaks).
     with open(lecture_tex_nosvg_pdf, 'rb') as f:
         pdfdoc = PyPDF2.PdfReader(f)
-        for i in range(pdfdoc.getNumPages()):
-            content = pdfdoc.getPage(i).extractText()
+        for i in range(len(pdfdoc.pages)):
+            content = pdfdoc.pages[i].extractText()
             for osvg_name, d in sinfo.items(): #enumerate(sinfo):
 
                 if d['pdf_label'] in content:
@@ -203,8 +203,8 @@ def slide_no_by_text(pdf_file, text):
         with open(pdf_file, 'rb') as f:
             print(pdf_file)
             pdfdoc = PyPDF2.PdfReader(f)
-            for i in range(pdfdoc.getNumPages()):
-                content = pdfdoc.getPage(i).extractText()
+            for i in range(len(pdfdoc.pages)):
+                content = pdfdoc.pages[i].extractText()
                 # for j, d in enumerate(sinfo):
                 if text in content:
                     return i+1