Me trying to grok how to make a basic REST client in Python for Azure Blob Storage services

basic-azure-rest-client.py

#!/usr/bin/env python3

import requests
import os
from dotenv import load_dotenv
from datetime import datetime
from azure.storage.common import CloudStorageAccount

load_dotenv('.env')

containername = os.environ.get('AZURE_CONTAINER_NAME')
project_id = os.environ.get('PROJECT_ID')
target_blob = 'genindex.html'
# snapshot_date_time = ''

azure_storage_account = os.environ.get('AZURE_STORAGE_ACCOUNT')
if (azure_storage_account is '' or azure_storage_account is None):
    print(f'AZURE_STORAGE_ACCOUNT not found in .env: {azure_storage_account}')
    raise KeyError

azure_sas_token = os.environ.get('AZURE_SAS_TOKEN')
if (azure_sas_token is '' or azure_sas_token is None):
    print('AZURE_SAS_TOKEN not found in .env')
    raise KeyError
if azure_sas_token.startswith('?'):
    # portal.azure.com creates shared access tokens that
    # start with a '?', which we strip off for consistency
    azure_sas_token = azure_sas_token[1:]

get_this_url = f"https://{azure_storage_account}.blob.core.windows.net/{containername}/{project_id}/{target_blob}?{azure_sas_token}"

# if (snapshot_date_time != '' or snapshot_date_time is None):
#    get_this_url = get_this_url + f"/?snapshot={snapshot_date_time}"

print(get_this_url)

with requests.Session() as r:
    r = requests.get(
        url=get_this_url,
        headers={
            #'Host': azure_storage_account,
            'Date': print(datetime.now())
        }
    )

    from pprint import pprint

    r.raise_for_status()
    print(r.status_code)



    pprint(r.content.decode('utf-8'))