Python script that extracts DOI from first PDF page using PyPDF2

#!/usr/bin/env python
# -*- encoding:utf-8 -*-

from PyPDF2 import PdfFileReader
import re
import sys

pdf_file = sys.argv[1]
doi_re = re.compile("10.(\d)+/([^(\s\>\"\<)])+")
input = PdfFileReader(file(pdf_file, "rb"))
text = input.getPage(0).extractText()

m = doi_re.search(text)
print(m.group(0))

Hi, thanks for sharing the codes.
I am very sorry to say that this method does not work for the pdf files downloaded from Acc. Chem. Res. journal. (https://pubs.acs.org/journal/achre4 )

see
qli@lhz:/Desktop/pdf_python$ python test.py acs.accounts.8b00502.pdf
10.1021/acs.accounts.8b00502Acc.Chem.Res.
qli@lhz:/Desktop/pdf_python$