How to create password encrypted zip file in python through AWS lambda

You didn't post your code, your os, etc. Did you upload the lib and the so file with your code?

Since I don't know much about what you did, I have created a simple lambda using ubuntu, pyminizip and python 3.7 to test it.

First of all, install pyminizip in your project's folder:

pip install pyminizip -t .

Note that you'll see a new folder, and a new so file:

Note that you'll need to upload both to lambda.

Now, just write your code. I've created a simple script that reads a json I uploaded with my code, and save it zipped in lambda's tmp folder:

import os

import pyminizip


def lambda_handler(event, context):        
    print(os.path.exists("/tmp/test.zip"))
    pyminizip.compress("test.json", None, "/tmp/test.zip", "awesomepassword", 9)
    return "ok"

You can see the lambda's folder structure below:

And that's all. If you test your lambda, you'll see that it just works fine.