AWS IAM - Find users and determine last time key(s) were used (if ever)

gistfile1.py

#!/usr/bin/env python

import boto.iam as a
import boto3

class UserInfo(object):

  def __init__(self, region = 'us-east-1'):
    self.region = region
    self.user_map = {}
    self.print_map = {}
    self.conn = a.connect_to_region(self.region)
    self.client = boto3.client('iam')

  def get_user_map(self):
    users = [x for x in self.conn.get_all_users()['list_users_response']['list_users_result']['users']]
    for user in users:
      self.user_map[user['user_name']] = ''

  def get_user_keys(self):
    for userName, userID in self.user_map.iteritems():
      key_data = self.conn.get_all_access_keys(userName)['list_access_keys_response']['list_access_keys_result']['access_key_metadata']
      if len(key_data) > 1:
        self.user_map[userName] = []
        for access_key in key_data:
          self.user_map[userName].append(access_key['access_key_id'])
      elif len(key_data) == 1:
        self.user_map[userName] = key_data[0]['access_key_id']
      else:
        print "User {0} does not have an access key".format(userName)

  def check_user_key(self):
    for userName, userID in self.user_map.iteritems():
      if isinstance(userID, list): #The idea here is that if the value is a list, we need to iterate
        for uID in userID:
          user = self.client.get_access_key_last_used(AccessKeyId=uID)
          try:
              print "{0}: {1}".format(userName, user['AccessKeyLastUsed']['LastUsedDate'])
          except:
            print "{0} has not used their access key: {1}".format(userName,uID)
            pass
      elif userID:
        user = self.client.get_access_key_last_used(AccessKeyId=userID)
        try:
          if user['AccessKeyLastUsed']['LastUsedDate']:
            print "{0}: {1}".format(userName, user['AccessKeyLastUsed']['LastUsedDate'])
        except:
          print "{0} has not used their access key".format(userName)
          pass

  def run(self):
    self.get_user_map()
    self.get_user_keys()
    self.check_user_key()

if __name__ == '__main__':
  userObj = UserInfo()
  userObj.run()

Disclaimer: This is ugly and was thrown together in 20 minutes.