List All the instances of AWS account using boto3 script

Hello Guys,
recently my boss has a requirement.He want to list all the instances of the AWS account across

the regions.So I have use boto3 library and so that we can use it any where with minimal setup.

  so I wrote a boto script to get it done.Here is the procedure to use it.step by step.

I am using ubuntu 16.04 as an operating system.below procedure  will also work fine with 

the ubuntu 14.04 as well.

1. Installation:

#sudo apt-get install python-softwware-properties

#sudo apt-get install  python-pip

#sudo pip install boto3

2. Configuring the boto3 library
 

Here we need to create few files like ~/.aws/credentials and ~/.aws/config
 

$ touch ~/.aws/credentials

 #Below are the contains of the file replace the foo and bar with the id and access key of your 

 AWS account

[default] 

aws_access_key_id=foo
aws_secret_access_key=bar

$ touch ~/.aws/config

#add the below containts to the file

region=us-west-2

and after this copy the below script and and execute it but remember in python orientation 

matters so dot change the orientation or the script will stop working.    

#!/usr/bin/env   python
from collections import defaultdict
"""
This script is Written by N.N.R.
on 12-09-16
"""
import boto3
"""
A tool for retrieving basic information from the running EC2 instances.
"""
client = boto3.client('ec2')
regions = client.describe_regions()['Regions']
for region in regions:
     region_name=region['RegionName']
# Connect to EC2
for region in regions:
 print("below are the instances running in")
 region_name=region['RegionName']
 print(region_name)
 ec2 = boto3.resource('ec2',region_name=region['RegionName'])
# Get information for all running instances
 running_instances = ec2.instances.filter(Filters=[{
    'Name': 'instance-state-name',
    'Values': ['running']}])
 ec2info = defaultdict()
 for instance in running_instances:
    for tag in instance.tags:
        if 'Name'in tag['Key']:
            name = tag['Value']
    # Add instance info to a dictionary
    ec2info[instance.id] = {
        'Name': name,
        'Type': instance.instance_type,
        'State': instance.state['Name'],
        'Private IP': instance.private_ip_address,
        'Public IP': instance.public_ip_address,
        'Launch Time': instance.launch_time
        }
 attributes = ['Name', 'Type', 'State', 'Private IP', 'Public IP', 'Launch Time']
 for instance_id, instance in ec2info.items():
    for key in attributes:
        print("{0}: {1}".format(key, instance[key]))
    print("------")


and Let me know if you have any issue with the script.