执行命令：
[list=1]
[]>>> subprocess.call([“ls”, “-l”])
[]0
[]>>> subprocess.call(“exit 1”, shell=True)
[]1
[/list]
测试调用系统中cmd命令,显示命令执行的结果:
[list=1]
[]x=subprocess.check_output([“echo”, “Hello World!”],shell=True)
[]
[]print(x)
[]“Hello World!”
[/list]
测试在python中显示文件内容:
[list=1]
[]y=subprocess.check_output([“type”, “app2.cpp”],shell=True)
[]
[]print(y)
[]#include
[]using namespace std;
[]…
[/list]
查看ipconfig -all命令的输出,并将将输出保存到文件tmp.log中:
[list=1]
[]handle = open(r’d:\tmp.log’,‘wt’)
[]subprocess.Popen([‘ipconfig’,‘-all’], stdout=handle)
[/list]
查看网络设置ipconfig -all,保存到变量中:
[list=1]
[]output = subprocess.Popen([‘ipconfig’,‘-all’], stdout=subprocess.PIPE,shell=True)
[]oc=output.communicate()#取出output中的字符串
[]#communicate() returns a tuple (stdoutdata, stderrdata).
[]print(oc[0]) #打印网络信息
[]
[]Windows IP Configuration
[]
[] Host Name . . . . .
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我们可以在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):
[list=1]
[]child1 = subprocess.Popen([“dir”,“/w”], stdout=subprocess.PIPE,shell=True)
[]child2 = subprocess.Popen([“wc”], stdin=child1.stdout,stdout=subprocess.PIPE,shell=True)
[]out = child2.communicate()
[]print(out)
[*] (’ 9 24 298\n’, None)
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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:
[list=1]
[]p= subprocess.Popen([“wc”], stdin=subprocess.PIPE,stdout=subprocess.PIPE,shell=True)
[]p.stdin.write(‘your command’)
[]p.stdin.flush()
[]#…do something
[]try:
[] #…do something
[] p.stdout.readline()
[] #…do something
[]except:
[] print(‘IOError’)
[]#…do something more
[]p.stdin.write(‘your other command’)
[]p.stdin.flush()
[]#…do something more
[/list]