testcases/config_functest.py

   1 #!/usr/bin/env python
   2 #
   3 # Copyright (c) 2015 Ericsson
   4 # jose.lausuch@ericsson.com
   5 # All rights reserved. This program and the accompanying materials
   6 # are made available under the terms of the Apache License, Version 2.0
   7 # which accompanies this distribution, and is available at
   8 # http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10
  11 import re, json, os, urllib2, argparse, logging, shutil, subprocess, yaml
  12 from git import Repo
  13
  14 from neutronclient.v2_0 import client
  15
  16 actions = ['start', 'check', 'clean']
  17
  18
  19
  20 parser = argparse.ArgumentParser()
  21 parser.add_argument("action", help="Possible actions are: '{d[0]}|{d[1]}|{d[2]}' ".format(d=actions))
  22 parser.add_argument("-d", "--debug", help="Debug mode",  action="store_true")
  23 args = parser.parse_args()
  24
  25
  26 """ logging configuration """
  27 logger = logging.getLogger('config_functest')
  28 logger.setLevel(logging.DEBUG)
  29
  30 ch = logging.StreamHandler()
  31 if args.debug:
  32     ch.setLevel(logging.DEBUG)
  33 else:
  34     ch.setLevel(logging.INFO)
  35
  36 formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
  37 ch.setFormatter(formatter)
  38 logger.addHandler(ch)
  39
  40
  41
  42 yaml_url = 'https://git.opnfv.org/cgit/functest/plain/testcases/functest.yaml'
  43 name = yaml_url.rsplit('/')[-1]
  44 dest = "./" + name
  45 if not os.path.exists(dest):
  46     logger.info("Downloading functest.yaml...")
  47     try:
  48         response = urllib2.urlopen(yaml_url)
  49     except (urllib2.HTTPError, urllib2.URLError):
  50         logger.error("Error in fetching %s" %yaml_url)
  51         exit(-1)
  52     with open(dest, 'wb') as f:
  53         f.write(response.read())
  54     logger.info("functest.yaml stored in %s" % dest)
  55 else:
  56     logger.info("functest.yaml found in %s" % dest)
  57
  58
  59 with open('./functest.yaml') as f:
  60     functest_yaml = yaml.safe_load(f)
  61 f.close()
  62
  63
  64 """ global variables """
  65 HOME = os.environ['HOME']+"/"
  66 FUNCTEST_BASE_DIR = HOME + functest_yaml.get("general").get("directories").get("dir_functest")
  67 RALLY_REPO_DIR = HOME + functest_yaml.get("general").get("directories").get("dir_rally_repo")
  68 RALLY_TEST_DIR = HOME + functest_yaml.get("general").get("directories").get("dir_rally")
  69 RALLY_INSTALLATION_DIR = HOME + functest_yaml.get("general").get("directories").get("dir_rally_inst")
  70 BENCH_TESTS_DIR = HOME + functest_yaml.get("general").get("directories").get("dir_rally_scn")
  71 VPING_DIR = HOME + functest_yaml.get("general").get("directories").get("dir_vping")
  72 ODL_DIR = HOME + functest_yaml.get("general").get("directories").get("dir_odl")
  73 NEUTRON_PUBLIC_NAME = functest_yaml.get("general").get("openstack").get("neutron_public_net_name")
  74 NEUTRON_NET_NAME = functest_yaml.get("general").get("openstack").get("neutron_net_name")
  75 NEUTRON_SUBNET_NAME = functest_yaml.get("general").get("openstack").get("neutron_subnet_name")
  76 NEUTRON_RANGE = functest_yaml.get("general").get("openstack").get("neutron_subnet_range")
  77 ROUTER_NAME = functest_yaml.get("general").get("openstack").get("neutron_router_name")
  78
  79 IMAGE_URL = functest_yaml.get("general").get("openstack").get("image_url")
  80 IMAGE_DISK_FORMAT = functest_yaml.get("general").get("openstack").get("image_disk_format")
  81 IMAGE_NAME = functest_yaml.get("general").get("openstack").get("image_name")
  82 IMAGE_FILE_NAME = IMAGE_URL.rsplit('/')[-1]
  83 IMAGE_DOWNLOAD_PATH = FUNCTEST_BASE_DIR + IMAGE_FILE_NAME
  84
  85
  86 def config_functest_start():
  87     """
  88     Start the functest environment installation
  89     """
  90     #if config_functest_check():
  91     #    logger.info("Functest environment already installed in %s. Nothing to do." %FUNCTEST_BASE_DIR)
  92     #    exit(0)
  93     if not check_internet_connectivity():
  94         logger.error("There is no Internet connectivity. Please check the network configuration.")
  95         exit(-1)
  96     elif not check_credentials():
  97         logger.error("Please source the openrc credentials and run the script again.")
  98         #TODO: source the credentials in this script
  99         exit(-1)
 100     elif not check_neutron_net(NEUTRON_PUBLIC_NAME):
 101         #The public network is normally created by default, no need to create a new one
 102         logger.debug("Public network '%s' not found." % NEUTRON_PUBLIC_NAME)
 103         logger.error("A public Neutron network is needed for the environment. Please create one.")
 104         #TODO: source the credentials in this script
 105         exit(-1)
 106     else:
 107         # Clean in case there are left overs
 108         config_functest_clean()
 109
 110         logger.info("Starting installationg of functest environment in %s" % FUNCTEST_BASE_DIR)
 111         os.makedirs(FUNCTEST_BASE_DIR)
 112         if not os.path.exists(FUNCTEST_BASE_DIR):
 113             logger.error("There has been a problem while creating the environment directory.")
 114             exit(-1)
 115
 116         logger.info("Donwloading test scripts and scenarios...")
 117         if not download_tests():
 118             logger.error("There has been a problem while downloading the test scripts and scenarios.")
 119             config_functest_clean()
 120             exit(-1)
 121
 122         logger.info("Installing Rally...")
 123         if not install_rally():
 124             logger.error("There has been a problem while installing Rally.")
 125             config_functest_clean()
 126             exit(-1)
 127
 128         logger.info("Installing ODL environment...")
 129         if not install_odl():
 130             logger.error("There has been a problem while installing Robot.")
 131             config_functest_clean()
 132             exit(-1)
 133
 134         logger.info("Creating a private Neutron network...")
 135         logger.debug("Checking if private network '%s' exists..." % NEUTRON_NET_NAME)
 136         #Now: if exists we don't create it again (the clean command does not clean the neutron network)
 137         #TODO: this check will not be needed when cleaning the neutron is implemented
 138         if check_neutron_net(NEUTRON_NET_NAME):
 139             logger.info("Private network '%s' found. No need to create another one." % NEUTRON_NET_NAME)
 140         else:
 141             logger.info("Private network '%s' not found. Creating..." % NEUTRON_NET_NAME)
 142             if not create_neutron_net():
 143                 logger.error("There has been a problem while creating the Neutron network.")
 144                 #config_functest_clean()
 145                 exit(-1)
 146
 147
 148         logger.info("Donwloading image...")
 149         if not download_url_with_progress(IMAGE_URL, FUNCTEST_BASE_DIR):
 150             logger.error("There has been a problem while downloading the image.")
 151             config_functest_clean()
 152             exit(-1)
 153
 154         logger.info("Creating Glance image: %s ..." %IMAGE_NAME)
 155         if not create_glance_image(IMAGE_DOWNLOAD_PATH,IMAGE_NAME,IMAGE_DISK_FORMAT):
 156             logger.error("There has been a problem while creating the Glance image.")
 157             config_functest_clean()
 158             exit(-1)
 159
 160         exit(0)
 161
 162
 163
 164 def config_functest_check():
 165     """
 166     Check if the functest environment is properly installed
 167     """
 168     errors_all = False
 169
 170     logger.info("Checking current functest configuration...")
 171
 172
 173     logger.debug("Checking directories...")
 174     errors = False
 175     dirs = [FUNCTEST_BASE_DIR, RALLY_INSTALLATION_DIR, RALLY_REPO_DIR, RALLY_TEST_DIR, BENCH_TESTS_DIR, VPING_DIR, ODL_DIR]
 176     for dir in dirs:
 177         if not os.path.exists(dir):
 178             logger.debug("The directory '%s' does NOT exist." % dir)
 179             errors = True
 180             errors_all = True
 181         else:
 182             logger.debug("   %s found" % dir)
 183     if not errors:
 184         logger.debug("...OK")
 185     else:
 186         logger.debug("...FAIL")
 187
 188
 189     logger.debug("Checking Rally deployment...")
 190     if not check_rally():
 191         logger.debug("Rally deployment NOT found.")
 192         errors_all = True
 193         logger.debug("...FAIL")
 194     else:
 195         logger.debug("...OK")
 196
 197
 198     logger.debug("Checking Neutron...")
 199     errors = False
 200     if not check_neutron_net(NEUTRON_NET_NAME):
 201         logger.debug("   Private network '%s' NOT found." % NEUTRON_NET_NAME)
 202         errors = True
 203         errors_all = True
 204     else:
 205         logger.debug("   Private network '%s' found." % NEUTRON_NET_NAME)
 206
 207     if not check_neutron_net(NEUTRON_PUBLIC_NAME):
 208         logger.debug("   Public network '%s' NOT found." % NEUTRON_PUBLIC_NAME)
 209         errors = True
 210         errors_all = True
 211     else:
 212         logger.debug("   Public network '%s' found." % NEUTRON_PUBLIC_NAME)
 213
 214     if not errors:
 215         logger.debug("...OK")
 216     else:
 217         logger.debug("...FAIL")
 218
 219
 220     logger.debug("Checking Image...")
 221     errors = False
 222     if not os.path.isfile(IMAGE_DOWNLOAD_PATH):
 223         logger.debug("   Image file '%s' NOT found." % IMAGE_DOWNLOAD_PATH)
 224         errors = True
 225         errors_all = True
 226     else:
 227         logger.debug("   Image file found in %s" % IMAGE_DOWNLOAD_PATH)
 228
 229     cmd="glance image-list | grep " + IMAGE_NAME
 230     FNULL = open(os.devnull, 'w');
 231     logger.debug('   Executing command : {}'.format(cmd))
 232     p=subprocess.Popen(cmd,shell=True,stdout=subprocess.PIPE,stderr=FNULL);
 233     #if the command does not exist or there is no glance image
 234     line = p.stdout.readline()
 235     if line == "":
 236         logger.debug("   Glance image NOT found.")
 237         errors = True
 238         errors_all = True
 239     else:
 240         logger.debug("   Glance image found.")
 241
 242     if not errors:
 243         logger.debug("...OK")
 244     else:
 245         logger.debug("...FAIL")
 246
 247     #TODO: check OLD environment setup
 248     if errors_all:
 249         return False
 250     else:
 251         return True
 252
 253
 254
 255
 256 def config_functest_clean():
 257     """
 258     Clean the existing functest environment
 259     """
 260     logger.info("Removing current functest environment...")
 261     if os.path.exists(RALLY_INSTALLATION_DIR):
 262         logger.debug("Removing rally installation directory %s" % RALLY_INSTALLATION_DIR)
 263         shutil.rmtree(RALLY_INSTALLATION_DIR,ignore_errors=True)
 264
 265     if os.path.exists(FUNCTEST_BASE_DIR):
 266         logger.debug("Removing functest directory %s" % FUNCTEST_BASE_DIR)
 267         cmd = "sudo rm -rf " + FUNCTEST_BASE_DIR #need to be sudo, not possible with rmtree
 268         execute_command(cmd)
 269
 270     #logger.debug("Deleting Neutron network %s" % NEUTRON_NET_NAME)
 271     #if not delete_neutron_net() :
 272     #    logger.error("Error deleting the network. Remove it manually.")
 273
 274     logger.debug("Deleting glance images")
 275     cmd = "glance image-list | grep "+IMAGE_NAME+" | cut -c3-38"
 276     p = os.popen(cmd,"r")
 277
 278     #while image_id = p.readline()
 279     for image_id in p.readlines():
 280         cmd = "glance image-delete " + image_id
 281         execute_command(cmd)
 282
 283     return True
 284
 285
 286
 287
 288
 289 def install_rally():
 290     if check_rally():
 291         logger.info("Rally is already installed.")
 292     else:
 293         logger.debug("Cloning repository...")
 294         url = "https://git.openstack.org/openstack/rally"
 295         Repo.clone_from(url, RALLY_REPO_DIR)
 296
 297         logger.debug("Executing %s./install_rally.sh..." %RALLY_REPO_DIR)
 298         install_script = RALLY_REPO_DIR + "install_rally.sh"
 299         cmd = 'sudo ' + install_script
 300         execute_command(cmd)
 301         #subprocess.call(['sudo', install_script])
 302
 303         logger.debug("Creating Rally environment...")
 304         cmd = "rally deployment create --fromenv --name=opnfv-arno-rally"
 305         execute_command(cmd)
 306
 307         logger.debug("Installing tempest...")
 308         cmd = "rally-manage tempest install"
 309         execute_command(cmd)
 310
 311         cmd = "rally deployment check"
 312         execute_command(cmd)
 313         #TODO: check that everything is 'Available' and warn if not
 314
 315         cmd = "rally show images"
 316         execute_command(cmd)
 317
 318         cmd = "rally show flavors"
 319         execute_command(cmd)
 320
 321     return True
 322
 323
 324
 325 def check_rally():
 326     """
 327     Check if Rally is installed and properly configured
 328     """
 329     if os.path.exists(RALLY_INSTALLATION_DIR):
 330         logger.debug("   Rally installation directory found in %s" % RALLY_INSTALLATION_DIR)
 331         FNULL = open(os.devnull, 'w');
 332         cmd="rally deployment list | grep opnfv";
 333         logger.debug('   Executing command : {}'.format(cmd))
 334         p=subprocess.Popen(cmd,shell=True,stdout=subprocess.PIPE,stderr=FNULL);
 335         #if the command does not exist or there is no deployment
 336         line = p.stdout.readline()
 337         if line == "":
 338             logger.debug("   Rally deployment not found")
 339             return False
 340         logger.debug("   Rally deployment found")
 341         return True
 342     else:
 343         logger.debug("   Rally installation directory not found")
 344         return False
 345
 346
 347 def install_odl():
 348     cmd = "chmod +x " + ODL_DIR + "create_venv.sh"
 349     execute_command(cmd)
 350     cmd = ODL_DIR + "create_venv.sh"
 351     execute_command(cmd)
 352     return True
 353
 354
 355 def check_credentials():
 356     """
 357     Check if the OpenStack credentials (openrc) are sourced
 358     """
 359     #TODO: there must be a short way to do this, doing if os.environ["something"] == "" throws an error
 360     try:
 361        os.environ['OS_AUTH_URL']
 362     except KeyError:
 363         return False
 364     try:
 365        os.environ['OS_USERNAME']
 366     except KeyError:
 367         return False
 368     try:
 369        os.environ['OS_PASSWORD']
 370     except KeyError:
 371         return False
 372     try:
 373        os.environ['OS_TENANT_NAME']
 374     except KeyError:
 375         return False
 376     try:
 377        os.environ['OS_REGION_NAME']
 378     except KeyError:
 379         return False
 380     return True
 381
 382
 383 def get_credentials():
 384     d = {}
 385     d['username'] = os.environ['OS_USERNAME']
 386     d['password'] = os.environ['OS_PASSWORD']
 387     d['auth_url'] = os.environ['OS_AUTH_URL']
 388     d['tenant_name'] = os.environ['OS_TENANT_NAME']
 389     return d
 390
 391 def get_nova_credentials():
 392     d = {}
 393     d['username'] = os.environ['OS_USERNAME']
 394     d['api_key'] = os.environ['OS_PASSWORD']
 395     d['auth_url'] = os.environ['OS_AUTH_URL']
 396     d['project_id'] = os.environ['OS_TENANT_NAME']
 397     return d
 398
 399
 400 def download_tests():
 401     os.makedirs(VPING_DIR)
 402     os.makedirs(ODL_DIR)
 403     os.makedirs(BENCH_TESTS_DIR)
 404
 405     logger.info("Downloading functest.yaml...")
 406     yaml_url = 'https://git.opnfv.org/cgit/functest/plain/testcases/functest.yaml'
 407     if not download_url(yaml_url,FUNCTEST_BASE_DIR):
 408         logger.error("Unable to download the configuration file functest.yaml")
 409         return False
 410
 411     logger.info("Downloading vPing test...")
 412     vPing_url = 'https://git.opnfv.org/cgit/functest/plain/testcases/vPing/CI/libraries/vPing.py'
 413     if not download_url(vPing_url,VPING_DIR):
 414         return False
 415
 416
 417     logger.info("Downloading Rally bench tests...")
 418     run_rally_url = 'https://git.opnfv.org/cgit/functest/plain/testcases/VIM/OpenStack/CI/libraries/run_rally.py'
 419     if not download_url(run_rally_url,RALLY_TEST_DIR):
 420         return False
 421
 422     rally_bench_base_url = 'https://git.opnfv.org/cgit/functest/plain/testcases/VIM/OpenStack/CI/suites/'
 423     bench_tests = ['authenticate', 'cinder', 'glance', 'heat', 'keystone', 'neutron', 'nova', 'quotas', 'requests', 'tempest', 'vm']
 424     for i in bench_tests:
 425         rally_bench_url = rally_bench_base_url + "opnfv-" + i + ".json"
 426         logger.debug("Downloading %s" %rally_bench_url)
 427         if not download_url(rally_bench_url,BENCH_TESTS_DIR):
 428             return False
 429
 430     logger.info("Downloading OLD tests...")
 431     odl_base_url = 'https://git.opnfv.org/cgit/functest/plain/testcases/Controllers/ODL/CI/'
 432     odl_tests = ['create_venv.sh', 'requirements.pip', 'start_tests.sh', 'test_list.txt']
 433     for i in odl_tests:
 434         odl_url = odl_base_url + i
 435         logger.debug("Downloading %s" %odl_url)
 436         if not download_url(odl_url,ODL_DIR):
 437             return False
 438
 439     return True
 440
 441
 442 def create_neutron_net():
 443     credentials = get_credentials()
 444     neutron = client.Client(**credentials)
 445     try:
 446         neutron.format = 'json'
 447         logger.debug('Creating Neutron network %s...' % NEUTRON_NET_NAME)
 448         json_body = {'network': {'name': NEUTRON_NET_NAME,
 449                     'admin_state_up': True}}
 450         netw = neutron.create_network(body=json_body)
 451         net_dict = netw['network']
 452         network_id = net_dict['id']
 453         logger.debug("Network '%s' created successfully" % network_id)
 454
 455         logger.debug('Creating Subnet....')
 456         json_body = {'subnets': [{'cidr': NEUTRON_RANGE,
 457                            'ip_version': 4, 'network_id': network_id}]}
 458         subnet = neutron.create_subnet(body=json_body)
 459         logger.debug("Subnet '%s' created successfully" % subnet)
 460
 461         logger.debug('Creating Router...')
 462         json_body = {'router': {'name': ROUTER_NAME, 'admin_state_up': True}}
 463         router = neutron.create_router(json_body)
 464         logger.debug("Router '%s' created successfully" % router)
 465         router_id = router['router']['id']
 466
 467         logger.debug('Creating Port')
 468         json_body = {'port': {
 469          'admin_state_up': True,
 470          'device_id': router_id,
 471          'name': 'port1',
 472          'network_id': network_id,
 473         }}
 474         response = neutron.create_port(body=json_body)
 475         logger.debug("Port created successfully.")
 476
 477         logger.debug('Setting up gateway...')
 478         public_network_id = get_network_id(neutron,NEUTRON_PUBLIC_NAME)
 479         json_body = {'network_id': public_network_id, 'enable_snat' :  True}
 480         gateway = neutron.add_gateway_router(router_id,body=json_body)
 481         logger.debug("Gateway '%s' added successfully" % gateway)
 482     except:
 483         logger.error("There has been a problem when creating the Neutron network.")
 484         return False
 485     finally:
 486         logger.info("Neutron network created successfully.")
 487         return True
 488
 489     return False
 490
 491 def get_network_id(neutron_client, network_name):
 492     networks = neutron_client.list_networks()['networks']
 493     id  = ''
 494     for n in networks:
 495         if n['name'] == network_name:
 496             id = n['id']
 497             break
 498     return id
 499
 500 def check_neutron_net(net_name):
 501     credentials = get_credentials()
 502     neutron = client.Client(**credentials)
 503     for network in neutron.list_networks()['networks']:
 504         if network['name'] == net_name :
 505             for subnet in network['subnets']:
 506                 return True
 507     return False
 508
 509 def delete_neutron_net():
 510     #TODO: remove router, ports
 511     credentials = get_credentials()
 512     neutron = client.Client(**credentials)
 513     try:
 514         #https://github.com/isginf/openstack_tools/blob/master/openstack_remove_tenant.py
 515         for network in neutron.list_networks()['networks']:
 516             if network['name'] == NEUTRON_NET_NAME :
 517                 for subnet in network['subnets']:
 518                     print "Deleting subnet " + subnet
 519                     neutron.delete_subnet(subnet)
 520                 print "Deleting network " + network['name']
 521                 neutron.delete_neutron_net(network['id'])
 522     finally:
 523         return True
 524     return False
 525
 526
 527
 528
 529
 530 def create_glance_image(path,name,disk_format):
 531     """
 532     Create a glance image given the absolute path of the image, its name and the disk format
 533     """
 534     cmd = "glance image-create --name "+name+" --is-public true --disk-format "+disk_format+" --container-format bare --file "+path
 535     execute_command(cmd)
 536     return True
 537
 538
 539
 540
 541
 542 def download_url(url, dest_path):
 543     """
 544     Download a file to a destination path given a URL
 545     """
 546     name = url.rsplit('/')[-1]
 547     dest = dest_path + name
 548     try:
 549         response = urllib2.urlopen(url)
 550     except (urllib2.HTTPError, urllib2.URLError):
 551         logger.error("Error in fetching %s" %url)
 552         return False
 553
 554     with open(dest, 'wb') as f:
 555         f.write(response.read())
 556     return True
 557
 558
 559 def download_url_with_progress(url, dest_path):
 560     """
 561     Download a file to a destination path given a URL showing the progress
 562     """
 563     name = url.rsplit('/')[-1]
 564     dest = dest_path + name
 565     try:
 566         response = urllib2.urlopen(url)
 567     except (urllib2.HTTPError, urllib2.URLError):
 568         logger.error("Error in fetching %s" %url)
 569         return False
 570
 571     f = open(dest, 'wb')
 572     meta = response.info()
 573     file_size = int(meta.getheaders("Content-Length")[0])
 574     logger.info("Downloading: %s Bytes: %s" %(dest, file_size))
 575
 576     file_size_dl = 0
 577     block_sz = 8192
 578     while True:
 579         buffer = response.read(block_sz)
 580         if not buffer:
 581             break
 582
 583         file_size_dl += len(buffer)
 584         f.write(buffer)
 585         status = r"%10d  [%3.2f%%]" % (file_size_dl, file_size_dl * 100. / file_size)
 586         status = status + chr(8)*(len(status)+1)
 587         print status,
 588
 589     f.close()
 590     print("\n")
 591     return True
 592
 593
 594 def check_internet_connectivity(url='http://www.google.com/'):
 595     """
 596     Check if there is access to the internet
 597     """
 598     try:
 599         urllib2.urlopen(url, timeout=5)
 600         return True
 601     except urllib.request.URLError:
 602         return False
 603
 604 def execute_command(cmd):
 605     """
 606     Execute Linux command
 607     """
 608     logger.debug('Executing command : {}'.format(cmd))
 609     #p = os.popen(cmd,"r")
 610     #logger.debug(p.read())
 611     output_file = "/tmp/output.txt"
 612     f = open(output_file, 'w+')
 613     p = subprocess.call(cmd,shell=True, stdout=f, stderr=subprocess.STDOUT)
 614     f.close()
 615     f = open(output_file, 'r')
 616     logger.debug(f.read())
 617     #p = subprocess.call(cmd,shell=True);
 618     if p == 0 :
 619         return True
 620     else:
 621         logger.error("Error when executing command %s" %cmd)
 622         exit(-1)
 623
 624
 625
 626
 627 def main():
 628     if not (args.action in actions):
 629         logger.error('argument not valid')
 630         exit(-1)
 631
 632     if args.action == "start":
 633         config_functest_start()
 634
 635     if args.action == "check":
 636         if config_functest_check():
 637             logger.info("Functest environment correctly installed")
 638         else:
 639             logger.info("Functest environment not found or faulty")
 640
 641     if args.action == "clean":
 642         while True:
 643             print("Are you sure? [y|n]")
 644             answer = raw_input("")
 645             if answer == "y":
 646                 config_functest_clean()
 647                 break
 648             elif answer == "n":
 649                 break
 650             else:
 651                 print("Invalid option.")
 652     exit(0)
 653
 654
 655 if __name__ == '__main__':
 656     main()
 657