如何使用变量在子进程中使用python在单个会话中执行多个命令

import subprocess

# 定义要执行的命令
command1 = "echo Hello"
command2 = "echo World"

# 执行第一个命令
process1 = subprocess.Popen(command1, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
output1, error1 = process1.communicate()

# 检查第一个命令的执行结果
if process1.returncode == 0:
    print("Command 1 executed successfully.")
    print("Output 1:", output1.decode())
else:
    print("Command 1 failed.")
    print("Error 1:", error1.decode())

# 执行第二个命令
process2 = subprocess.Popen(command2, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
output2, error2 = process2.communicate()

# 检查第二个命令的执行结果
if process2.returncode == 0:
    print("Command 2 executed successfully.")
    print("Output 2:", output2.decode())
else:
    print("Command 2 failed.")
    print("Error 2:", error2.decode())