Python call rest api to get data from url - python-3.x

Question

I've created a Bash script to get the data from the url using rest API from a appliance using username, password and saving the Session ID into a Variable and then using the session ID to get the data into csv format which is working fine.
I want to change the bash code into python3 code as i'm parsing it using pandas.
Bash Code:
#!/bin/bash
sessionID=$(curl -k -H "accept: application/json" -H "content-type: application/json" -H "x-api-version: 120" -d '{"userName":"administrator","password":"adminpass"}' -X POST https://hpe.sysnergy.com/rest/login-sessions | jq -r ".sessionID")
curl -k -H 'accept: application/json' \
-H 'content-type: text/csv' \
-H 'x-api-version: 2' \
-H "auth: $sessionID" \
-X GET https://hpe.sysnergy.com/rest/resource-alerts
Python Version of tries code:
#!/usr/bin/python3
import requests
import json
url = "https://hpe.sysnergy.com/rest/login-sessions"
data = {'username': 'administrator', 'password': 'adminpass'}
headers = {'Content-type': 'text/csv', 'Accept': 'application/json', 'x-api-version': 2}
r = requests.post(url, data=json.dumps(data), headers=headers)
print(r)
I am getting below error:
Error:
requests.exceptions.InvalidHeader: Value for header {x-api-version: 2} must be of type str or bytes, not <class 'int'>
if i convert int to str as '2' then it gives another ssl error:
requests.exceptions.SSLError: HTTPSConnectionPool(host='hpe.synerg.com', port=443): Max retries exceeded with url: /rest/login-sessions (Caused by SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:877)'),))
EDIT:
I have tried little different approach to get the same code format as bash in python but now it returns new error with new response code.
import os
import requests
sessionID = os.getenv('sessionID')
headers = {
'accept': 'application/json',
'content-type': 'text/csv',
'x-api-version': '2',
'auth': f"{sessionID}",
}
data = '{"userName":"administrator","password":"adminpassword"}'
response = requests.post('https://hpe.synergy.com/rest/login-sessions', headers=headers, data=data, verify=False)
print(response)
Error:
/python3/lib64/python3.6/site-packages/urllib3/connectionpool.py:1020: InsecureRequestWarning: Unverified HTTPS request is being made to host 'hpe.synergy.com'. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
InsecureRequestWarning,
<Response [415]>
Please help or suggest the way to achieve same function in the python.

Answer 1

You first need to make a POST request to get the sessionID, then you need to make a GET request. Also note the headers are slightly different for the 2 requests. Something like this should work:
import requests
session = requests.Session()
url = "https://hpe.sysnergy.com/rest/login-sessions"
credentials = {"userName": "administrator", "password": "adminpass"}
headers = {"accept": "application/json",
"content-type": "application/json",
"x-api-version": "120",
}
response = session.post(url, headers=headers, json=credentials, verify=False)
session_id = response.json()["sessionID"]
url = "https://hpe.sysnergy.com/rest/resource-alerts"
headers = {"accept": "application/json",
"content-type": "text/csv",
"x-api-version": "2",
"auth": session_id,
}
response = session.get(url, headers=headers, verify=False)
print(response)
#print(response.content) # returns bytes
#print(response.text) # returns string