main.py

import requests
 
root_url = "https://www.trackitt.com/tracker/ajax_fetch_trackers"
 
def get_records(records, records_per_query):
    post_data = {
        "tracker_case_table_name": "tracker_us_opt_eb",
        "tracker_id": 101,
        "length": records_per_query,
    }
 
    for i in range(records/records_per_query+1):
        post_data["start"] = i*records_per_query
        r = requests.post(root_url, post_data)
        res = r.json()
        for record in res["data"]:
            yield record
 
if __name__ == "__main__":
    for record in  get_records(8881, 200):
        print record