Python调用adb shell ls，取前5个字符存放，并打印出来

import subprocess  def run_adb_shell_command(command):# 设置adb的路径，根据您的实际情况进行修改  adb_path = 'adb'  # 使用subprocess运行adb shell命令，并捕获输出  result = subprocess.run([adb_path, 'shell', command], capture_output=True, text=True)  # 检查命令是否成功执行  if result.returncode != 0:  print(f"Error executing command: {result.stderr}")  return Noneprint('Stdout:', result.stdout)return resultdef run_adb_shell_command_and_get_first_chars(command, num_start, num_chars):  result = run_adb_shell_command(command)# 获取命令输出，并取前num_chars个字符  output = result.stdout.strip()[num_start:num_start + num_chars] # 打印前num_chars个字符  #print(f"First {num_chars} characters of the output: {output}")  return outputdef concatenate_strings(str1, str2):  #print(str1 + str2)return str1 + str2MY_CONSTANT = 42  first_five_chars = int(run_adb_shell_command_and_get_first_chars('expr 2 + 3', 0, 1))run_adb_shell_command(concatenate_strings('expr 2 + ', str(MY_CONSTANT + first_five_chars)))#print(first_five_chars)