Python Cloud SDKs for Data Engineers: boto3 for AWS S3, azure-storage-blob for Azure Blob and ADLS Gen2, google-cloud-storage for GCS, Authentication, Upload, Download, List, Delete, pandas Integration, and Production Patterns
The complete Python cloud storage guide for data engineers. boto3 for AWS S3: client vs resource, upload, download, list with pagination, read directly into pandas, presigned URLs, multipart transfers. azure-storage-blob for Azure Blob Storage and ADLS Gen2: BlobServiceClient, ContainerClient, BlobClient, DefaultAzureCredential, connection strings, SAS tokens. google-cloud-storage for GCS. Cross-cloud comparison table. Production patterns: cloud-to-local ETL, cloud-to-cloud copy, partitioned uploads. Eight common mistakes and seven interview Q&As.