get function returns None from Beautifulsoup object

[DeanAseraf1]

I'm trying to list all titles from a specific Wikipedia page
for some reason when i apply the .get function on the Beautifulsoup object to get all the 'id's, it returns None.

this is my code:

import requests
from bs4 import BeautifulSoup


def spider(max_pages):
    page = 1
    while page <= max_pages:
        main_page = 'https://wikipedia.org/wiki/'
        search = input("Enter your search: ")
        page_to_search = main_page + str(search)
        source_code = requests.get(page_to_search)
        plain_text = source_code.text
        soup = BeautifulSoup(plain_text, features="html.parser")
        for title in soup.findAll('h2'):
            print(title)
            ids = link.get('id')
            print(ids)
        page += 1


spider(1)

this is the output:

Output:
Enter your search: >? train
<h2>Contents</h2>
None
<h2><span class="mw-headline" id="Types">Types</span></h2>
None
<h2><span class="mw-headline" id="Bogies">Bogies</span></h2>
None
<h2><span class="mw-headline" id="Motive_power">Motive power</span></h2>
None
<h2><span class="mw-headline" id="Passenger_trains">Passenger trains</span></h2>
None
<h2><span class="mw-headline" id="Freight_trains">Freight trains</span></h2>
None
<h2><span class="mw-headline" id="See_also">See also</span></h2>
None
<h2><span class="mw-headline" id="References">References</span></h2>
None
<h2><span class="mw-headline" id="Further_reading">Further reading</span></h2>
None
<h2><span class="mw-headline" id="External_links">External links</span></h2>
None
<h2>Navigation menu</h2>
None

I've tried to get the links instead and it works the same way,
i also searched online and tried to change the code a little and it doesn't seem to change anything.

Python 3.7
Windows 10
Pycharm community edition 2019.2
BeautifulSoup4
requests