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python 004 执行环境对比

对比:os.system os.popen subprocess.Popen subprocess.call
为什么要搞这么多?
# --*--encoding: utf-8--*--
import os
import subprocess

os_system = os.system(dir)
print os_system
#只获取了返回值,如果获取输出需如下:
re = os.system(dir>C:\Users\Administrator\PycharmProjects\dir.txt)
print re
print open(C:\Users\Administrator\PycharmProjects\dir.txt,r).readlines()

re1 = os.popen(dir)
print re1.read()
print - * 20

re2 = subprocess.Popen(dir, shell=True, stdout=subprocess.PIPE)
print re2
print re2.stdout.read()

re3 = subprocess.call((dir,C:/Users/Administrator/PycharmProjects/),shell=True)
print re3

 

 

python 004 执行环境对比