如何多次向python上的另一个程序提供输入 [英] How to give input multiple times to another program on python
问题描述
我想制作打开两个程序的python文件.这两个程序必须多次相互获取输入.我打开了两个程序并知道如何为一个程序提供输入,但我不知道如何在一个程序上多次输入并多次获得输出.我的代码是这样的.
I want to make python file which opens two programs. This two programs have to get input from each other multiple times. I opened two programs and know how to give input to one program, but i don't know how to give input multiple time on one program and get output multiple time. My code is like this.
subprocess.call("/usr/bin/gcc -o p1 "+path1,shell=True)
subprocess.call("/usr/bin/gcc -o p2 "+path2,shell=True)
cmd_1 = subprocess.Popen("./p1",shell = True,stdin = subprocess.PIPE,stdout = subprocess.PIPE,stderr = subprocess.PIPE)
cmd_2 = subprocess.Popen("./p2",shell = True,stdin = subprocess.PIPE,stdout = subprocess.PIPE,stderr = subprocess.PIPE)
std_out_1 = cmd_1.stdout
std_out_2 = cmd_2.stdout
for line in std_out_1.readlines():
print(line.decode('ascii'))
for line in std_out_2.readlines():
print(line.decode('ascii'))
现在这个程序只是获取程序输出.我想为每个程序提供 N 次输入并获得 N 次输出.所以我希望我的代码是这样的.
Now this program just get program output. I want to give input N times for each program and get output N times. So I expect my code to be like this.
give_input(n)
for i in range(n):
t_1 = get_output(t_2) //give input t_2, and get output t_1
t_2 = get_output(t_1) //give input t_1, and get output t_2
推荐答案
尝试使用 write
和 communicate
将数据发送到 cmd_1
和 cmd_2
并得到响应,见 https://docs.python.org/3/library/subprocess.html#popen-constructor.
Try using write
and communicate
to send data to cmd_1
and cmd_2
and get the response, see https://docs.python.org/3/library/subprocess.html#popen-constructor.
for i in range(n):
cmd_1 = subprocess.Popen("./p1",shell = True,stdin = subprocess.PIPE,stdout = subprocess.PIPE,stderr = subprocess.PIPE)
cmd_2 = subprocess.Popen("./p2",shell = True,stdin = subprocess.PIPE,stdout = subprocess.PIPE,stderr = subprocess.PIPE)
cmd_1.stdin.write(cmd_input[n])
cmd_2.stdin.write(cmd_input[n])
cmd1_stdout, cmd1_stderr = cmd_1.communicate()
cmd2_stdout, cmd2_stderr = cmd_2.communicate()
for line in cmd1_stdout:
print(line.decode('ascii'))
for line in cmd2_stdout:
print(line.decode('ascii'))
这篇关于如何多次向python上的另一个程序提供输入的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!