Python| os.getppid() 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.getppid()方法用于获取当前进程的父进程ID。

Syntax: os.getppid()

Parameter: Not required

Return Type: This method returns a integer value denoting the parent process ID of the current process. The return type of this method is of class ‘int’.

代码 #1：使用 os.getppid() 方法

# Python program to explain os.getppid() method 
  
# importing os module 
import os
  
# Get the Parent process ID 
# of the current process
ppid = os.getppid()
  
# Print the Parent process ID 
# of the current process
print("Parent Process ID of current process:", ppid)

输出：

Parent process ID of current process: 7653

代码 #2：使用 os.getppid() 方法

# Python program to explain os.getppid() method 
  
# importing os module 
import os
  
  
# Check the process ID 
# of the current process
pid = os.getpid()
print("Process ID of Current process:", pid)
  
  
# Create a child process
try:
    pid = os.fork()
except OSError:
    exit("Could not create a child process")
  
  
# In the child process 
# Check its Parent process ID
# os.getppid() will return 
# the process ID of its parent process
if pid == 0:
     parent = os.getppid()
     print("Parent process ID of child process:", parent)

输出：

Process ID of Current process: 7653
Parent process ID of child process: 7653