【脚本语言系列】关于Python进程线程管理系统模块，你需要知道的事

如何使用Python管理进程线程

进程的运行环境

# -*- coding:utf-8 -*-
import os

path = os.environ.get("PATH")
print path

C:\Python27\;C:\Python27\Scripts;C:\Python35\;C:\Python35\Scripts\;C:\Windows\system32;C:\Windows

# -*- coding:utf-8 -*-
import os

for key in os.environ.keys():
print key, "\t", os.environ[key]

PATH C:\Python27\;C:\Python27\Scripts;C:\Python35\;C:\Python35\Scripts\;
C:\Windows\system32;C:\Windows
SYSTEMROOT  C:\Windows
SESSIONNAME     Console
PATHEXT     .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY;.PYW
WINDIR  C:\Windows
HOMEDRIVE   C:

创建进程

# -*- coding:utf-8 -*-
import os
# create the process with  "system"
print os.system("dir")

# -*- coding:utf-8 -*-
import os
# create the process with  "os.execl"
notepad = "C:\\Windows\\notepad.exe"
os.execl(notepad,"newfile1.txt")
notepad = "C:\\Windows\\not_notepad.exe"
os.execl(notepad,"newfile2.txt")

终止进程

# -*- coding:utf-8 -*-
import sys
# exit the process with  "sys.exit"
try:
filename = sys.argv[1]
print filename
except:
print "Usage:", sys.argv[0],"filename"
sys.exit(1)
return 0

-f

File "<ipython-input-6-72d5801fa3fc>", line 10
return 0
SyntaxError: 'return' outside function

# -*- coding:utf-8 -*-
import os,sys
# exit the process with  "sys.exit"
try:
filename = sys.argv[1]
print filename
except:
print "Usage:", sys.argv[0],"filename"
os.abort()
return 0

-f

File "<ipython-input-5-eefc966778fc>", line 10
return 0
SyntaxError: 'return' outside function

什么是进程线程