范例1:查看ipconfig -all命令的输出,并将将输出保存到文件tmp.log中:
import subprocesshandle = open(r'd:\tmp.log','w')p=subprocess.Popen(['ipconfig','-all'], stdout=handle) if p.poll()==None: print "end<<<<<<<<<<<<<<<<" p.terminate() handle.close()
范例2:查看网络设置ipconfig -all,保存到变量中:
#coding:utf-8import subprocessoutput = subprocess.Popen(['ipconfig','-all'], stdout=subprocess.PIPE,shell=True)oc=output.communicate()#取出output中的字符串print oc[0]#打印网络信息
范例3:显示文件t2.py的内容
import subprocessy=subprocess.check_output(["type", "t2.py"],shell=True)print(y)
范例4: 调用系统中cmd命令,显示命令执行的结果
import subprocessx=subprocess.check_output(["echo", "Hello World!"],shell=True)print(x)
范例5:在Popen()建立子进程的时候改变标准输入、标准输出和标准错误,并可以利用subprocess.PIPE将多个子进程的输入和输出连接在一起,构成管道(pipe):
import subprocesschild1 = 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]
范例6:如果想频繁地和子线程通信,那么不能使用communicate();因为communicate通信一次之后即关闭了管道.这时可以试试下面的方法:
import subprocessp=subprocess.Popen("dir", shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT) while True: buff = p.stdout.readline() if buff == '' and p.poll() != None: break