Python中的getopt函数使用详解

def ParseOptions(argv, docstring, extra_opts="", extra_long_opts=(), extra_option_handler=None):
 try:
 opts, args = getopt.getopt(
  argv, "hvp:s:x" + extra_opts,
  ["help", "verbose", "path=", "signapk_path=", "extra_signapk_args=", "java_path=", "public_key_suffix=", "private_key_suffix=", "device_specific=", "extra="] + list(extra_long_opts))
 except getopt.GetoptError, err:
 Usage(docstring)
 print "**", str(err), "**"
 sys.exit(2)
 path_specified = False
 for o, a in opts:
 if o in ("-h", "--help"):
  Usage(docstring)
  sys.exit()
 elif o in ("-v", "--verbose"):
  OPTIONS.verbose = True
 elif o in ("-p", "--path"):
  OPTIONS.search_path = a
 elif o in ("--signapk_path",):
  OPTIONS.signapk_path = a
 elif o in ("--extra_singapk_args",):
  OPTIONS.extra_signapk_args = shlex.split(a)
 elif o in ("--java_path",):
  OPTIONS.java_path = a
 else:
  if extra_option_handler is None or not extra_option_handler(o, a):
  assert False, "unknown option \"%s\"" % (o,)
 os.environ["PATH"] = (os.path.join(OPTIONS.search_path, "bin") + os.pathsep + os.environ["PATH"])
 return args

其中，extra_option_handler可以理解为函数指针，它的功能也是解析opts的键值对。
extra_option_handler源码如下：

def option_handler(o, a):
 if o in ("-b", "--board_config"):
 pass # deprecated
 elif o in ("-k", "--package_key"):
 OPTIONS.package_key = a
 elif o in ("-i", "--incremental_from"):
 OPTIONS.incremental_source = a
 elif o in ("-w", "--wipe_user_data"):
 OPTIONS.wipe_user_data = True
 elif o in ("-n", "--no_prereq"):
 OPTIONS.omit_prereq = True
 elif o in ("-e", "--extra_script"):
 OPTIONS.extra_script = a
 elif o in ("-a", "--aslr_mode"):
 if a in ("on", "On", "true", "True", "yes", "Yes"):
 OPTIONS.aslr_mode = True
 else:
 OPTIONS.aslr_mode = False
 elif o in ("--worker_threads"):
 OPTIONS.worker_threads = int(a)
 else:
 return False
 return True

-v,-p,-k,