python --subprocess 範例

範例1：查看ipconfig -all命令的輸出,並將將輸出保存到文件tmp.log中:

import subprocess
handle = open(r'd:\tmp.log','w')
p=subprocess.Popen(['ipconfig','-all'], stdout=handle)
if p.poll()==None:
　　print "end<<<<<<<<<<<<<<<<"
　　p.terminate()
　　handle.close()

 

範例2:查看網絡設置ipconfig -all,保存到變量中:

#coding:utf-8
import subprocess
output = subprocess.Popen(['ipconfig','-all'], stdout=subprocess.PIPE,shell=True)
oc=output.communicate()#取出output中的字符串
print oc[0]#打印網絡信息

 

範例3：顯示文件t2.py的內容

import subprocess
y=subprocess.check_output(["type", "t2.py"],shell=True)
print(y)

 

範例4: 調用系統中cmd命令,顯示命令執行的結果

import subprocess
x=subprocess.check_output(["echo", "Hello World!"],shell=True)
print(x)

 

範例5：在Popen()創建子進程的時候改變標準輸入、標準輸出和標準錯誤，並能夠利用subprocess.PIPE將多個子進程的輸入和輸出鏈接在一塊兒，構成管道(pipe):

import subprocess
child1 = subprocess.Popen(["dir", "/w"], stdout=subprocess.PIPE,shell=True)
child2 = subprocess.Popen(["echo", "hello"], stdin=child1.stdout,stdout=subprocess.PIPE,shell=True)
out1 = child1.communicate()
out2 = child2.communicate()
print out2[0]
print "********************"
for i in range(len(out1)):
    print out1[i]
    

 

範例6：若是想頻繁地和子線程通訊,那麼不能使用communicate();由於communicate通訊一次以後即關閉了管道.這時能夠試試下面的方法:

import subprocess
p=subprocess.Popen("dir", shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)  
while True:  
    buff = p.stdout.readline()  
    if buff == '' and p.poll() != None:  
        break