tuple indices must be integers or slices, not str

[cybertooth]

Thanks a lot for explaining things . I was not sure of saving the images in a list would work hence created a temporary folder to save the extracted images but i see that creating a list is better as it is more efficient . The folder method was i guess the main reason i was getting a lag in loading the images and secondly it was not working every time though the temporary folder was being created.As for the use of grid yes I might not be understanding it clearly , can you suggest a good tutorial to understand grid and pack methods.
I would also like to know what factors determine how the images are extracted from the pdf file. I have seen that in some cases all the images are individually extracted while in some cases they are extracted as a group.