Shodan Scrape for 3389 and webserver, first 100

#!/usr/bin/env python3

import sys
from urllib.request import urlopen
import json
import csv
from time import sleep
from pprint import pprint

#vars
api_key = sys.argv[1] #read your API key as the first arg in the commandline
ip_limit = 100 #limit number of hosts
ip_list = [] #set up the ip list shell


def get_shodan_3389_webservers(api_key,ip_limit,ip_list):
    init_url = 'https://api.shodan.io/shodan/host/count?key=' + api_key + '&query=country:US+port:3389+server:+WebServer&facets=ip:' + str(ip_limit)
    #we are gathering a list of ip addresses, this was necessary since you must have a paid account to do actual queries
    #fortunately, we can poll the system for content
    with urlopen(init_url) as init_resp: 
        init_content = init_resp.read()
    init_response = json.loads(init_content)
    for ip_index in range(ip_limit): #here we add the individual ips to a list
        ip_list.append(init_response['facets']['ip'][ip_index]['value'])

    #opening up the csv file and setting the headers
    with open('shodan_data.csv', 'w', newline='') as csv_file:
        fieldnames = ['IP Address','Operating System']
        write_out = csv.DictWriter(csv_file, fieldnames=fieldnames)
        write_out.writeheader()
        #iterate through the ip list and pull the data for each host
        for ip in ip_list:
            req_url = 'https://api.shodan.io/shodan/host/' + ip + '?key=' + api_key
            with urlopen(req_url) as final_resp:
                final_content = final_resp.read()
                sleep(2) #making sure it doesn't walk on itself or make too many requests too quickly
            final_response = json.loads(final_content)
            #grab the ip and os for each host, writing it to the csv file
            ip_str = final_response['ip_str']
            op_sys = final_response['os']
            write_out.writerow({'IP Address':ip_str,'Operating System':op_sys})


get_shodan_3389_webservers(api_key,ip_limit,ip_list)