要修改这段代码，你可以使用以下方式：
import subprocess
# 执行命令并获取输出
output = subprocess.check_output("sudo ovs-vsctl show", shell=True)
lines = output.decode().split("\n")
# 查找包含 "dpdk_phy$num" 的行及其后三行
target_line = None
for i, line in enumerate(lines):
if "dpdk_phy$num" in line:
target_line = i
break
if target_line is not None:
# 修改目标行及其后三行
lines[target_line] = "your_new_value1"
lines[target_line + 1] = "your_new_value2"
lines[target_line + 2] = "your_new_value3"
lines[target_line + 3] = "your_new_value4"
# 将修改后的结果输出到控制台或写入文件
modified_output = "\n".join(lines)
print(modified_output)
# 或者将修改后的内容写入文件，例如：
# with open("modified_output.txt", "w") as f:
# f.write(modified_output)
请注意，你需要替换 "your_new_value1", "your_new_value2", "your_new_value3" 和 "your_new_value4" 为你想要设置的新值。另外，请确保在执行这段代码时有足够的权限来运行 sudo 命令。
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