How to write a file or data to an S3 object using boto3
amazon-s3, amazon-web-services, boto, boto3, python
Solution
In boto 3, the 'Key.set_contents_from_' methods were replaced by
Object.put()
Client.put_object()
For example:
import boto3
some_binary_data = b'Here we have some data'
more_binary_data = b'Here we have some more data'
# Method 1: Object.put()
s3 = boto3.resource('s3')
object = s3.Object('my_bucket_name', 'my/key/including/filename.txt')
object.put(Body=some_binary_data)
# Method 2: Client.put_object()
client = boto3.client('s3')
client.put_object(Body=more_binary_data, Bucket='my_bucket_name', Key='my/key/including/anotherfilename.txt')
Alternatively, the binary data can come from reading a file, as described in the official docs comparing boto 2 and boto 3:
Storing Data
Storing data from a file, stream, or string is easy:
# Boto 2.x
from boto.s3.key import Key
key = Key('hello.txt')
key.set_contents_from_file('/tmp/hello.txt')
# Boto 3
s3.Object('mybucket', 'hello.txt').put(Body=open('/tmp/hello.txt', 'rb'))
Problem
In boto 2, you can write to an S3 object using these methods: - Key.set_contents_from_string() - Key.set_contents_from_file() - Key.set_contents_from_filename() - Key.set_contents_from_stream() Is there a boto 3 equivalent? What is the boto3 method for saving data to an object stored on S3?