code: def main():
      global args
      if args.list:
          print_configs(args.cuda)
      elif args.num:
          print(cal_num_of_configs(args.use, args.cuda) - 1)
      elif args.remove:
          print(get_remove_string(args.use, args.cuda))
      elif args.getall:
          print(get_all_strings(args.use, args.cuda))
      elif args.install >= 0:
          print(get_install_string(args.install, args.use, args.cuda))
      elif args.extra_index:
          print(get_extra_indices(args.use, args.cuda))
      elif args.links_index:
          print(get_links_indices(args.use, args.cuda))
  
imports: import argparse
  import sys
  from pip._vendor.packaging.version import parse
  import urllib.parse
  from urllib.request import urlopen, HTTPError, Request, URLError
label_desc: Use image node_id 9 for calling a global function with example usage: main() without return types