To resolve this, you have two primary options: switch to the interface or use the Object sub-resource. Option 1: Use the Client (Recommended)
print(type(s3)) # -> WRONG for download_file # -> CORRECT for download_file Use code with caution. Bucket vs. Object Methods Even within Resources, methods live in different places:
The error AttributeError: 's3.ServiceResource' object has no attribute 'download_file' occurs because you are trying to use a method on a Resource object. To resolve this, you have two primary options:
It doesn't know how to download a file until you tell it which Bucket or Object to look at. 💡 Troubleshooting Common Mistakes Checking Your Instance Type If you aren't sure what your variable is, print its type:
s3.Object('name', 'key').download_file(...) — (Object level) s3.download_file(...) — Fails (Service level) 🚀 Pro Tip: TransferConfig Object Methods Even within Resources, methods live in
If you prefer working with the high-level resource, you must drill down to the specific object first.
In Boto3, the ServiceResource and Client are two different interfaces. Only the Client (and S3 Bucket or Object resource sub-classes) contains the download_file method. 🛠️ The Quick Fix In Boto3, the ServiceResource and Client are two
import boto3 # Use client instead of resource s3 = boto3.client('s3') s3.download_file('my-bucket', 'my-key.txt', 'local-file.txt') Use code with caution. Option 2: Use the Object Resource