TypeError when extracting pincode from resume

Question

I have to extract data from resumes. And when I try to extract pincode from resume the below error occurred and I can't rectify it.

I am passing a file object and read through open() and then saved it to the variable called _datas_. I am using python 3.6.

Below is the code I used:

import re 

def pincode_fetch(pincode):
    pincode = re.search(r"^[1-9]\d{5}$", pincode)
    return pincode

print(pincode_fetch(datas))

The expected output is like this: "686533". But I got an error like this:

--> 182     return _compile(pattern, flags).search(string)
    183 
    184 def sub(pattern, repl, string, count=0, flags=0):

TypeError: expected string or bytes-like object

Answer 1

 import re 
 pincodesearch = re.compile(r'(\d\d\d\d\d)') 
 mo = pincodesearch.search('Carnival technopark trivandrum 686533') 
 print(mo.groups())[0]