How to extract paragraphs containing keyword from pdf of novel?

Question

I am trying to extract paragraphs from a novel containing a particular keyword but this is not running properly. open to any suggestions even alternative programs/modules but am limited to python. code below:

import PyPDF2
import re
pattern = ('.', 'thought', 'night', 'face', '.')
fileName = input('ethanfrome22.pdf')
object = PyPDF2.PdfFileReader(fileName)
numPages = object.getNumPages()
for i in range(0, numPages):
    pageObj = object.getPage(i)
    text = pageObj.extractText() 
    for match in re.finditer(pattern, text):
        print(f'Page no: {i} | Match: {match}')