Python: Access Denied at Random Points When Using Requests - python-3.x

Question

I am using requests and beautifulsoup to go through the popular comic store comixology in order to make a list of all comic titles and issues and release date for all of them, so I am requesting a massive amount of web pages. Unfortunately, partway through i will get the error:
you do not have access to (URL) on this server
I tried using a function that recursively tries the request. but this isn't working
Im not putting the whole code in because it is very long.
def getUrl(url):
try:
page = requests.get(url)
except:
getUrl(url)
return page

Answer 1

The User-Agent request header contains a characteristic string that allows the network protocol peers to identify the application type, operating system, software vendor or software version of the requesting software user agent. Validating User-Agent header on server side is a common operation so be sure to use valid browser’s User-Agent string to avoid getting blocked.
(Source: http://go-colly.org/articles/scraping_related_http_headers/)
The only thing you need to do is to set a legitimate user-agent. Therefore add headers to emulate a browser. :
# This is a standard user-agent of Chrome browser running on Windows 10
headers = { 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36' }
Example:
from bs4 import BeautifulSoup
import requests
headers={'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36'}
resp = requests.get('http://example.com', headers=headers).text
soup = BeautifulSoup(resp, 'html.parser')
Additionally, you can add another set of headers to pretend like a legitimate browser. Add some more headers like this:
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36',
'Accept' : 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
'Accept-Language' : 'en-US,en;q=0.5',
'Accept-Encoding' : 'gzip',
'DNT' : '1', # Do Not Track Request Header
'Connection' : 'close'
}