Prompt Title: Python PIL and PDF.

To make the script read PDF files in addition to TIF files, you will need to modify the code in a few places:

1. Import the PyPDF2 library at the top of your script:

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import PyPDF2

2. Update the files variable to include PDF files in addition to TIF files:

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files = [f for f in os.listdir(folder_path) if f.endswith('.tif') or f.endswith('.pdf')]

3. Add a conditional statement for PDF files in the for loop:

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for file in files:
    # construct the full path to the file
    file_path = os.path.join(folder_path, file)
    
    if file.endswith('.tif'):
        # open the TIFF file using pillow
        img = Image.open(file_path)
        
        # get the dimensions, resolution, and color space of the image based on the file name
        if file.endswith('-6R.tif'):
            dims = (11103, 11103)
            res = (150, 150)
            color_space = 'LAB'
        ...
        # check if the dimensions, resolution, and color space are correct
        error_message = ""
        if img.size != dims:
            error_message += "Dimensions are incorrect. "
        if img.info.get('dpi', (None, None)) != res:
            error_message += "Resolution is incorrect. "
        if img.mode != color_space:
            error_message += "Color space is incorrect. "
        if error_message != "":
            # create the AppleScript to flag the file
            script = """
                tell application "Finder"
                    set file_to_flag to (POSIX file "{}") as alias
                    set label index of file_to_flag to 2
                end tell
                """.format(file_path)
            # execute the AppleScript to flag the file
            subprocess.call(['osascript', '-e', script])
            # increment the error count
            error_count += 1
            # append the file name and error message to their respective lists
            error_files.append(file)
            error_messages.append(error_message)
            
    elif file.endswith('.pdf'):
        # open the PDF file using PyPDF2
        pdf_file = open(file_path, 'rb')
        pdf_reader = PyPDF2.PdfFileReader(pdf_file)
        
        # get the dimensions of the first page in the PDF
        page = pdf_reader.getPage(0)
        dims = (int(page.mediaBox.getWidth()), int(page.mediaBox.getHeight()))
        
        # check if the dimensions are correct
        error_message = ""
        if dims != (2488, 1621):
            error_message += "Dimensions are incorrect. "
        if error_message != "":
            # create the AppleScript to flag the file
            script = """
                tell application "Finder"
                    set file_to_flag to (POSIX file "{}") as alias
                    set label index of file_to_flag to 2
                end tell
                """.format(file_path)
            # execute the AppleScript to flag the file
            subprocess.call(['osascript', '-e', script])
            # increment the error count
            error_count += 1
            # append the file name and error message to their respective lists
            error_files.append(file)
            error_messages.append(error_message)

This code will check the dimensions of the first page of a PDF file and flag the file if the dimensions are incorrect. You can modify the code to check other properties of the PDF file if necessary.