to_image causes 'map' object is not subscriptable in Image.py, line 1203

[tye-shutty]

Hi,

I have this code working on one computer, but not the other:

import pdfplumber

pdf_obj = pdfplumber.open('existing1.pdf')
page = pdf_obj.pages[0]
images_in_page = page.images
page_height = page.height
image = images_in_page[3]
file_name = "test.png"
image_bbox = (image['x0'], page_height - image['y1'],
              image['x1'], page_height - image['y0'])
try:
  cropped_page = page.crop(image_bbox)
  image_obj = cropped_page.to_image(resolution=400)
  image_obj.save(file_name, format="PNG")
except ValueError:
  print('image outside of crop area')

traceback:

Traceback (most recent call last):
  File "/home/mo/codebase/pdf-image-locator/image_coords_demo.py", line 13, in <module>
    image_obj = cropped_page.to_image(resolution=400)
  File "/home/mo/.local/lib/python3.9/site-packages/pdfplumber/page.py", line 296, in to_image
    return PageImage(self, **kwargs)
  File "/home/mo/.local/lib/python3.9/site-packages/pdfplumber/display.py", line 74, in __init__
    self.original = self.original.crop(map(int, cropbox))
  File "/home/mo/.local/lib/python3.9/site-packages/PIL/Image.py", line 1205, in crop
    if box[2] < box[0]:
TypeError: 'map' object is not subscriptable

Working computer (Ubuntu 18.04.6 LTS) has python 3.7.6, ImageMagick 7.1.0-19
Failing computer (Ubuntu 21.10) has python 3.7 and python 3.9.7 (both fail), ImageMagick 7.1.0-2
edit: both use pdfplumber 0.6.0

existing1.pdf

[jsvine]

Hi @tye-shutty, and thanks for posting. Looking at the traceback, and investigating further, this seems to have something to do with newer versions of PIL/pillow. As defined in its requirements.txt, pdfplumber requires Pillow>=8.4. The code works fine for me with 8.4 (and 9.0) but falis (with the same error) when I upgrade to the latest version, 9.1, released just 10 days ago. (Specifically, it appears to stem from the addition of these lines checking for negative crops.)

If you'd like to check for your particular case, can you add this line to your script and rerun on your two machines:

import PIL
print(PIL.__version__)

If that's indeed the case for you, the immediate fix would be to run pip install pillow==9.0 in your relevant environment. In the long run, I'll aim to release a fix to the relevant code in pdfplumber.