My Python reference page

I don’t spend as much time building actual large projects in Python any more (though I was paid to write Python for a few years in my early career). These days it’s mostly just for random glue scripts on a variety of systems.

Quick s3 client

Setup an S3 client, with credentials loaded from the env. You actually don’t need to explicitly list the creds, so long as you set AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY. Magic ✨

import boto3

s3 = boto3.resource('s3')

for bucket in s3.buckets.all():

A generator to yield chunks of a fixed size

def chunks(lst, n):
    """Yield successive n-sized chunks from lst."""
    for i in range(0, len(lst), n):
        yield lst[i:i + n]

From StackOverflow