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How to create an AWS session using Boto3 library in Python?
When a user wants to use AWS services using lambda or programming code, a session needs to set up first to access AWS services.
An AWS session could be default as well as customized based on needs.
Problem Statement − Use Boto3 library in Python to create an AWS session.
Approach/Algorithm to solve this problem
Step 1 − To create an AWS session, first set up authentication credentials. Users can find it in IAM console or alternatively, create the credential file manually. By default, its location is at ~/.aws/credentials
Example
[default] aws_access_key_id = YOUR_ACCESS_KEY aws_secret_access_key = YOUR_SECRET_ACCESS_KEY aws_session_token = YOUR_SESSION_TOKEN region = REGION_NAME
Step 2 − Install Boto3 using the command - pip install boto3
Step 3 − Import the Boto3 library.
Step 4 − If creating the session with default credential, use Session() with no parameter.
Step 5 − If session is customized, pass the following parameters −
aws_access_key_id (string) -- AWS access key ID
aws_secret_access_key (string) -- AWS secret access key
aws_session_token (string) -- AWS temporary session token
region_name (string) -- Default region when creating new connections
profile_name (string) -- The name of a profile to use. If not given, then the default profile is used.
Example
The following code creates an AWS session for default as well as customized credentials −
import boto3 # To create default session: def create_aws_session(): session = boto3.session.Session() #it creates the default session and can use to connect with any AWS service return session print(create_aws_session()) # To Create customized session: def create_customized_session(aws_access_key, aws_secret_key, aws_token, region_name=None,profile_name=None): session = boto3.session.Session(aws_access_key_id=aws_access_key, aws_secret_access_key=aws_secret_key, aws_session_token = aws_token, region_name=region_name, profile_name = profile_name) # Here, region_name and profile_name are optional parameters and default value is None Print(session) return session
Output
#if default region_name is not present or NONE and region_name is not passed in #credential file/calling parameter Session(region_name=None) Session(region_name=None) #if default region_name is present and region_name is passed in credential file/calling #parameter Session(region_name=YOUR_REGION_NAME) Session(region_name= YOUR_REGION_NAME)
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