echo "sub process is running" # 在标准输出中显示一行 if [ $# != 1 ] # 如果没有带上参数,返回值是0 then exit 0 else # 否则返回值就是参数 exit $1 fi 1. 2. 3. 4. 5. 6. 7. 8. 运行结果如下: $ ./callSubprocess.sh 1 # 指定了返回值为1 sub process is running $ echo $?
if [ $# != 1 ] # 如果没有带上参数,返回值是0 then exit 0 else # 否则返回值就是参数 exit $1 fi 运行结果如下: $ ./callSubprocess.sh 1 # 指定了返回值为1 sub process is running $ echo $? # 查看返回值 1 $ ./callSubprocess.sh 3 # 指定了返回值为3 sub process is running $ ...
subprocess 是 Python 中执行操作系统级别的命令的模块,所谓系级级别的命令就是如ls /etc/user ifconfig 等和操作系统有关的命令。 subprocess 创建子进程来执行相关命令,并连接它们的输入、输出和错误管道,获取它们的返回状态。 1|1subprocess 来源 Subprocess模块开发之前,标准库已有大量用于执行系统级别命令的的方法...
下面是一段示例代码,演示了如何使用subprocess模块执行tasklist命令来检查一个进程是否在运行: importsubprocessdefcheck_process_running(process_name):output=subprocess.check_output(['tasklist'])processes=output.decode('utf-8').split('\n')forprocessinprocesses:ifprocess_name.lower()inprocess.lower():return...
import subprocess import time def check_and_close_program(program_name): process = subprocess.Popen(["pgrep", program_name], stdout=subprocess.PIPE, stderr=subprocess.PIPE) stdout, stderr = process.communicate() if process.returncode == 0: print(f"{program_name} is running, closing it...
def check_process_running(process_name): # 使用ps命令检查进程是否存在 cmd = "ps aux | grep {}".format(process_name) output = subprocess.getoutput(cmd) # 检查输出结果中是否包含进程名 if process_name in output: return True else: return False ...
First off, you might be wondering why there’s a sub in the Python subprocess module name. And what exactly is a process, anyway? In this section, you’ll answer these questions. You’ll come away with a high-level mental model for thinking about processes. If you’re already familiar ...
exit code 1 [end of output] note: This error originates from a subprocess, and...
在尝试安装paddleocr库时,有时会遇到依赖包安装失败的问题。最近,一些用户在安装过程中遇到了一个特定的错误,即在安装python-Levenshtein包时失败,错误信息如下: error: subprocess-exited-with-error× Running setup.py install for python-Levenshtein did not run successfully.× Encountered error while trying to ...
python multithreading process popen 我需要能够在Python中启动一个long-running进程。当进程运行时,我需要通过管道将输出传输到我的Python应用程序,以在UI中显示它。用户界面还需要能够终止进程。 我做了很多研究。但我还没有找到一种方法来完成这三件事。 subprocess.popen()允许我启动一个进程并在需要时终止它。但...