Present the full text content of an online PDF with Python

It displays the following error message:

PdfReadWarning: Xref table not zero-indexed. ID numbers for objects will be corrected. [pdf.py:1736]

and how can i find the last page dynamically?

I try:

import requests, PyPDF2

import os
import io
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.converter import TextConverter
from pdfminer.layout import LAParams
from pdfminer.pdfpage import PDFPage

url = 'https://servicestorageblob.blob.core.windows.net/dataset/Coursera - The Essential Skills Playbook.pdf'
response = requests.get(url)
my_raw_data = response.content

open_pdf_file = open("Coursera - The Essential Skills Playbook.pdf", 'rb')
read_pdf = PyPDF2.PdfFileReader(open_pdf_file)
if read_pdf.isEncrypted:
read_pdf.decrypt("")
print(read_pdf.getPage(5).extractText())

else:
print(read_pdf.getPage(5).extractText())


def convert_pdf_to_txt(path):
'''Convert pdf content from a file path to text

:path the file path
'''
rsrcmgr = PDFResourceManager()
codec = 'utf-8'
laparams = LAParams()

with io.StringIO() as retstr:
with TextConverter(rsrcmgr, retstr, codec=codec,
laparams=laparams) as device:
with open(path, 'rb') as fp:
interpreter = PDFPageInterpreter(rsrcmgr, device)
password = ""
maxpages = 0
caching = True
pagenos = set()

for page in PDFPage.get_pages(fp,
pagenos,
maxpages=maxpages,
password=password,
caching=caching,
check_extractable=True):
interpreter.process_page(page)

return retstr.getvalue()

text_combined = convert_pdf_to_txt(open_pdf_file)
print(text_combined)

but the error message is displayed:

The Essential Skills Map
for digital transformation
6
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-6-2cb100754238> in <module>
51 return retstr.getvalue()
52
---> 53 text_combined = convert_pdf_to_txt(open_pdf_file)
54 print(text_combined)

<ipython-input-6-2cb100754238> in convert_pdf_to_txt(path)
34 with TextConverter(rsrcmgr, retstr, codec=codec,
35 laparams=laparams) as device:
---> 36 with open(path, 'rb') as fp:
37 interpreter = PDFPageInterpreter(rsrcmgr, device)
38 password = ""

TypeError: expected str, bytes or os.PathLike object, not _io.BufferedReader