I have a pandas DataFrame that I want to upload to a new CSV file. The problem is that I don't want to save the file locally before transferring it to s3. Is there any method like to\_csv for writing the dataframe to s3 directly? I am using boto3.  

Here is what I have so far:

```
import boto3
s3 = boto3.client('s3', aws_access_key_id='key', aws_secret_access_key='secret_key')
read_file = s3.get_object(Bucket, Key)
df = pd.read_csv(read_file['Body'])

# Make alterations to DataFrame

# Then export DataFrame to CSV through direct transfer to s3

```