Python| os._exit() 方法

Python中的OS 模块提供了与操作系统交互的功能。操作系统属于 Python 的标准实用程序模块。该模块提供了一种使用操作系统相关功能的可移植方式。

Python中的os._exit()方法用于以指定状态退出进程，而无需调用清理处理程序、刷新 stdio 缓冲区等。

注意：该方法通常在 os.fork() 系统调用后的子进程中使用。退出进程的标准方法是sys.exit(n)方法。

Syntax: os._exit(status)

Parameter:
status: An integer value or above defined values representing the exit status.

Return type: This method does not return any value in the calling process.

代码：使用os._exit()方法

# Python program to explain os._exit() method 
  
# importing os module  
import os
  
# Create a child process
# using os.fork() method 
pid = os.fork()
  
  
# pid greater than 0
# indicates the parent process 
if pid > 0:
  
    print("\nIn parent process")
    # Wait for the completion 
    # of child process and    
    # get its pid and 
    # exit status indication using
    # os.wait() method
    info = os.waitpid(pid, 0)
  
      
    # os.waitpid() method returns a tuple
    # first attribute represents child's pid
    # while second one represents
    # exit status indication
  
    # Get the Exit code 
    # used by the child process
    # in os._exit() method
      
    # firstly check if
    # os.WIFEXITED() is True or not
    if os.WIFEXITED(info[1]) :
        code = os.WEXITSTATUS(info[1])
        print("Child's exit code:", code)
  
else :
    print("In child process")
    print("Process ID:", os.getpid())
    print("Hello ! Geeks")
    print("Child exiting..")
      
    # Exit with status os.EX_OK
    # using os._exit() method
    # The value of os.EX_OK is 0        
    os._exit(os.EX_OK)

输出：

In child process
Process ID: 15240
Hello! Geeks
Child exiting..


In parent process
Child's exit code: 0

参考资料： https://docs。 Python.org/3/library/os.html#os._exit