Check for read/write permission on a list of s3 bucket names. Use boto3.

check_s3_bucket_access.py

import boto3

# Build your list of bucket names.
s3_list = ["abc", "xyz", "my-dev-bucket"]

s3 = boto3.client('s3')

for i, bkt in enumerate(s3_list):
    # Try reading first.
    try:
        s3.list_objects(Bucket=bkt)['Contents']
        read = 1
    except:
        read = 0

    # Writing
    try:
        resp = s3.put_object(
            Bucket=bkt,
            Key=f"test_{bkt}.txt",
            Body="test",
            ACL="bucket-owner-full-control",
        )
        write = 1
    except Exception as err:
        write = 0

    print(f"{bkt}: r = {read}, w = {write}")