Identify API: 104 connection reset by peer

Hi, I’m sending a massive number(over 100k) of custom properties through a for loop and python sdk, but this took too much time and got ConnectionResetError(104, 'Connection reset by peer'). I know this is due to some protection from the server, but I don’t know in what condition will trigger this error. So I’m wondering the best practice if I have a lot of data to send.

Here’s what I have tried:

1. sent the data with an array like this, but got a 500 internal server error:

{'token': 'mykey',
 'properties': [{'$email': 'e1', 'mylabel': 0.0014},
  {'$email': 'e2', 'mylabel': 0.0002}]}

2. iterated all my data, but somehow got ConnectionResetError:

from klaviyo_sdk import Client
client = Client(private_key, max_delay=5, max_retries=2)

succeed_emails = []
failed_emails = []
for email, label in zip(emails, labels):
    data = {
        "token": private_key,
        "properties": {
            "$email": email,
            "mylabel": label
        }
    }
    res = client.TrackIdentify.identify_post(data=data)
    if res == "0":
        failed_emails.append(email)
    else:
        succeed_emails.append(email)

By the way, this is probably related to this topic.

Thank you!