---------------create security groups.py --------------------------------------------------
from novaclient import client
import os

OS_PASSWORD=os.environ['OS_PASSWORD']
OS_AUTH_URL=os.environ['OS_AUTH_URL']
OS_USER_NAME=os.environ['OS_USERNAME']
OS_TENANT_NAME=os.environ['OS_TENANT_NAME']

nova = client.Client('2', OS_USER_NAME, OS_PASSWORD, OS_TENANT_NAME,
                      OS_AUTH_URL, connection_pool=True)

print nova.security_groups.create(name="Security_Group_1",description="sample security Group")
print nova.security_groups.list()

-----------------------------------------create tenants.py----------------------------------------------
from keystoneauth1.identity import v2
from keystoneauth1 import session
from keystoneclient.v2_0 import client
import os

OS_PASSWORD=os.environ['OS_PASSWORD']
OS_AUTH_URL=os.environ['OS_AUTH_URL']
OS_USER_NAME=os.environ['OS_USERNAME']
OS_TENANT_NAME=os.environ['OS_TENANT_NAME']

auth = v2.Password(auth_url=OS_AUTH_URL,
                   username=OS_USER_NAME,
                    password=OS_PASSWORD,
                    tenant_name=OS_TENANT_NAME)
sess = session.Session(auth=auth)
keystone = client.Client(session=sess)
print "Creating a new tenant"
tenant=keystone.tenants.create(tenant_name="Ne_Tenant1231",description="The Sample Tenant", enabled=True)
print tenant
store_all_tenants=keystone.tenants.list()
print "Adding user to tenant"
my_tenant = [each_tenant for each_tenant in store_all_tenants if each_tenant.name==tenant.name][0]
my_user = keystone.users.create(name="Sample_ser123",password="secretword",tenant_id=my_tenant.id)
print my_user