get() function

def get(url, proxy):
    """
    Sends a GET request to the given url using given proxy server.
    The proxy server is used without SSL, so the URL should be HTTP.

    Args:
        url - string: HTTP URL to send the GET request with proxy
        proxy - string: proxy server in the form of {ip}:{port} to use while sending the request
    Returns:
        Response of the server if the request sent successfully. Returns `None` otherwise.

    """
    try:
        r = requests.get(url, proxies={"http": f"http://{proxy}"})
        if r.status_code < 400: # client-side and server-side error codes are above 400
            return r
        else:
            print(r.status_code)
    except Exception as e:
        print(e)

    return None