I am following tutorial to write to VPS database at <https://docs.aws.amazon.com/lambda/latest/dg/services-rds-tutorial.html>

I get down to "Create the Lambda function". I have a folder in home called `aws_mysql_tutorial/app.py` and also **init**.py which is the app.py the tutorial shows to run the db commands. I did not find a command line way to zip this file or folder, but I see the argument `--zip-file fileb://app.zip` and have no idea what to zip and where to put it...I do not know what 'fileb' path means.

How can I satisfy `aws lambda create-function`?

after making a 7zip file, I get the following error

```
$ aws lambda create-function --function-name CreateTableAddRecordsAndRead --runtime python3.8 --zip-file fileb://app.7z --handler app.handler --role arn:aws:iam:::role/lambda-vpc-role --vpc-config SubnetIds=subnet-,subnet-,SecurityGroupIds=sg-

--zip-file must be a zip file with the fileb:// prefix.
Example usage:  --zip-file fileb://path/to/file.zip

```