通过管道传输 Python 子进程中的用户输入和用户输出？

问：

我正在编写一个 python 程序来运行另一个 python 程序，并将其输入和输出通过管道传输到不同的日志文件中。

我尝试创建这个，但它似乎过早地关闭了文件：

import subprocess
import shlex

def main():
  program_filename = "calculator.py" 
  input_log_filename = "user_input.log"
  output_log_filename = "program_output.log"

  with open(input_log_filename, "w") as input_log, open(output_log_filename, "w") as output_log:

    print("Calculator program is running.")
    
    command = f"python3 {program_filename}"
    process = subprocess.Popen(shlex.split(command), stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True, bufsize=1)
    
    while True:
        program_output, _ = process.communicate(timeout=1)
        if program_output:
            output_log.write(program_output)
        print("Program Output:", program_output.strip())

        user_input = input("Enter input: ")
        if user_input.lower() == "exit":
            break

        input_log.write(user_input + "\n")  
        process_input = user_input + "\n"
        process.stdin.write(process_input)
        process.stdin.flush()
      
    process.stdin.close()
    process.stdout.close()
    process.stderr.close()

if __name__ == "__main__":
  main()