Update app.py

app.py

@@ -343,16 +343,15 @@ def generate_certificate(certificate_model, first_name, last_name):
     # Date of certification
     d.text((1480, 1170), str(date.today()), fill="black", anchor="mm", font=date_font)
 
-    im_temp = conv_rgba_to_rgb(im)
-    pdf = im_temp.save("certificate"+".pdf")
+    im_temp = im.load()
+    background = Image.new("RGB", im_temp.size, (255, 255, 255))
+    background.paste(im_temp, mask=png.split()[3]) # 3 is the alpha channel
+    
+    pdf = background.save("certificate"+".pdf")
 
     return im, pdf
 
-def conv_rgba_to_rgb(_rgba):
-  _rgba = Image.open(_rgba)
-  _rgb = Image.new('RGB', _rgba.size, (255, 255, 255))
-  _rgb.paste(_rgba, mask=_rgba.split()[3])
-  return _rgb
+
 
 def add_certified_user(hf_username, first_name, last_name, pass_percentage):
   """