Question

主脚本在新的子进程和线程中启动第二个脚本，该脚本不断检查stdout中的数据。第二个脚本要求输入。我想让第一个脚本询问用户输入，然后将其传递给第二个脚本。我正在开发Windows并且无法让人工作。

test.py - 主脚本

import threading
import subprocess

def read_output(process):
    print("starting to read")
    for line in process.stdout:
       print (line.rstrip())

def write_output(process,s):
    process.stdin.write(s.encode('utf-8'))
    process.stdin.flush()

process = subprocess.Popen('python test2.py', shell=False,
                           stdin=subprocess.PIPE, stdout=subprocess.PIPE,
                           stderr=None)

# Create new threads
thread1 = threading.Thread(read_output(process))

# Start new Threads
thread1.daemon=True
thread1.start()

s=input("test input:")
print("yep:"+s)
thread1.process.stdin.write(s.encode('utf-8'))
thread1.process.stdin.flush()

test2.py第二个脚本

print("Enter an input A,B,C:")

s=input("")
print("you selected:"+s)

Answer 1

第一个错误：创建线程时出现错误的args。您正在传递在主进程中调用的函数的结果：线程尚未启动，您在主线程中读取输出，而不是在已启动的线程中读取。

修复如下：

thread1 = threading.Thread(target=read_output,args=(process,))

第二个错误（或者程序可能继续），你必须在写入字符串后关闭进程stdin：

process.stdin.close()

已修复test1.py个文件：

import threading
import subprocess

def read_output(process):
    print("starting to read")
    for line in process.stdout:
       print (line.rstrip())


process = subprocess.Popen('python test2.py', shell=False,
                           stdin=subprocess.PIPE, stdout=subprocess.PIPE,
                           stderr=None)

# Create new thread: pass target and argument
thread1 = threading.Thread(target=read_output,args=(process,))

# Start new Threads
thread1.daemon=True
thread1.start()

s=input("test input:")
print("yep:"+s)

process.stdin.write(s.encode('utf-8'))
process.stdin.write("\r\n".encode('utf-8'))  # emulate "ENTER" in thread
process.stdin.close()  # close standard input or thread doesn't terminate
thread1.join()   # wait for thread to finish

将输入从一个线程子进程发送到另一个

1 个答案: