args = parser.parse_args() parse_args()方法会解析命令行参数并返回一个args对象,其中包含了我们定义的参数的值。 1.5 获取参数值 通过args对象,我们可以获取用户提供的命令行参数的值,并在程序中进行相应的处理: arg1_value = args.arg1 arg2_value = args.arg2 在上面的示例中,我们通过args.arg1和args.a...
调用os.popen()函数后,可以通过read()、readline()、readlines()等方法来读取命令的输出结果。 优点: 可以获取系统命令的输出结果 缺点: 无法对命令执行过程进行控制,也无法获取命令的返回值。 回到顶部 subprocess.call() subprocess.call(args, *, stdin=None, stdout=None, stderr=None, shell=False) args是...
class subprocess.Popen(args, bufsize=-1, executable=None, stdin=None, stdout=None, stderr=None, preexec_fn=None, close_fds=True, shell=False, cwd=None, env=None, universal_newlines=False, startupinfo=None, creationflags=0, restore_signals=True, start_new_session=False, pass_fds=()) 在...
os.system(cmd)或os.popen(cmd),前者返回值是脚本的退出状态码,后者的返回值是脚本执行过程中的输出内容。 示例: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 importos command="ifconfig"command_output=os.popen(command).readlines()print(command_output)a=os.popen("ipconfig")print(a.read())>>...
sftp://[username[:password]@]hostname[:port]/path Download files using HTTP http://hostname[:port]/path Args: url: URL of remote file local_path: local path to put the file Returns: A integer of return code """ url_tuple = urlparse(url) print_ztp_log(f"Download {url_tuple.path...
parser.parse_args() Below is the output from quick run of above script. Python argparse module provide a lot many features, you should read about them atpython argparsetutorial for clear understanding. That’s all for different options to read and parse command line arguments in python, you ...
key = args.key ifargs.decrypt: key = -key cyphertext = encrypt(text_string, key) print(cyphertext) if__name__ =='__main__': caesar() 这段代码也遵循了上述规则,而且与前面的手工编写的脚本相比,可以提供更准确的文档,以及更具有交互性的错...
Usage:sys.args[0] [option] -h or --help:显示帮助信息 -m or --module:模块名称 例如:ansible all -m shell -a 'date' -a or --args:模块对于的参数 例如:ansible all -m shell -a 'date' -v or --version:显示版本 """ ) if len(sys.argv) == 1: ...
Finally, line 46 calls the func attribute from args. This attribute will automatically call the function associated with the subcommand at hand. Go ahead and try out your new CLI calculator by running the following commands: Shell $ python calc.py add 3 8 11.0 $ python calc.py sub 15 5...
geek@ubuntu:~$ scrapy Scrapy 2.1.0 - no active project Usage: scrapy <command> [options] [args] Available commands: bench Run quick benchmark test fetch Fetch a URL using the Scrapy downloader genspider Generate new spider using pre-defined templates runspider Run a self-contained spider (with...