AWS Cross Account Python Script

AWSCrossAccount.py

import boto3

client = boto3.client('sts',region_name='us-east-1',aws_access_key_id='xxxx',aws_secret_access_key='xxxx')

response = client.assume_role(
    RoleArn = 'arn:aws:iam::066600000000:role/xxx',
    RoleSessionName = 'newsession',
    DurationSeconds = 43200
)['Credentials']

credentials = '''
[default]
aws_access_key_id=%s
aws_secret_access_key=%s
aws_session_token=%s
''' % ( response['AccessKeyId'] , response['SecretAccessKey'] , response['SessionToken'] )

fo = open("/root/.aws/credentials", "w")
fo.write(credentials)
fo.close()
print(credentials)