How to save S3 object to a file using boto3

Question

I\'m trying to do a \"hello world\" with new boto3 client for AWS.

The use-case I have is fairly simple: get object from S3 and save it to the file.

In boto

Answer 1

For those of you who would like to simulate the set_contents_from_string like boto2 methods, you can try

import boto3
from cStringIO import StringIO

s3c = boto3.client('s3')
contents = 'My string to save to S3 object'
target_bucket = 'hello-world.by.vor'
target_file = 'data/hello.txt'
fake_handle = StringIO(contents)

# notice if you do fake_handle.read() it reads like a file handle
s3c.put_object(Bucket=target_bucket, Key=target_file, Body=fake_handle.read())

---

For Python3:

In python3 both StringIO and cStringIO are gone. Use the StringIO import like:

from io import StringIO

To support both version:

try:
   from StringIO import StringIO
except ImportError:
   from io import StringIO