subprocess之check_out用法
在python3中使用subprocess的check_out方法时,因为该输出为byte类型,所以如果要查看具体的内容时需要进行转码,如果转码不对话,会影响内容输出的可读性,如下:
#1,输出解码不带参数
1 # -*- coding:utf-8 -*- 2 3 import subprocess 4 cmd = r"ping www.baidu.com" 5 result = subprocess.check_output(cmd) 6 print(result.decode()) # decode中不带参数,默认是以utf-8解码 7 8 9 输出报错: 10 Traceback (most recent call last): 11 File "E:/debug.py", line 12, in <module> 12 print(result.decode()) # decode中不带参数 13 UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd5 in position 2: invalid continuation byte 14 15 Process finished with exit code 1
#2,输出解码带上 unicode_escape 参数,会显示乱码
1 # -*- coding:utf-8 -*- 2 3 import subprocess 4 cmd = r"ping www.baidu.com" 5 result = subprocess.check_output(cmd) 6 print(result.decode("unicode_escape")) # decode中带参数 unicode_escape 7 8 9 输出显示乱码如下: 10 ÕýÔÚ Ping www.a.shifen.com [14.215.177.39] ¾ßÓÐ 32 ×Ö½ÚµÄÊý¾Ý: 11 À´×Ô 14.215.177.39 µÄ»Ø¸´: ×Ö½Ú=32 ʱ¼ä=6ms TTL=47 12 À´×Ô 14.215.177.39 µÄ»Ø¸´: ×Ö½Ú=32 ʱ¼ä=6ms TTL=47 13 À´×Ô 14.215.177.39 µÄ»Ø¸´: ×Ö½Ú=32 ʱ¼ä=6ms TTL=47 14 À´×Ô 14.215.177.39 µÄ»Ø¸´: ×Ö½Ú=32 ʱ¼ä=6ms TTL=47 15 16 14.215.177.39 µÄ Ping ͳ¼ÆÐÅÏ¢: 17 Êý¾Ý°ü: ÒÑ·¢ËÍ = 4£¬ÒѽÓÊÕ = 4£¬¶ªÊ§ = 0 (0% ¶ªÊ§)£¬ 18 Íù·µÐг̵ĹÀ¼Æʱ¼ä(ÒÔºÁÃëΪµ¥Î»): 19 ×î¶Ì = 6ms£¬× = 6ms£¬Æ½¾ù = 6ms 20 21 22 Process finished with exit code 0
#3、输出解码带上 gbk 参数,显示正常
1 # -*- coding:utf-8 -*- 2 3 import subprocess 4 cmd = r"ping www.baidu.com" 5 result = subprocess.check_output(cmd) 6 print(result.decode("gbk")) # decode中带参数 gbk 7 8 9 输出显示正常如下: 10 正在 Ping www.a.shifen.com [14.215.177.39] 具有 32 字节的数据: 11 来自 14.215.177.39 的回复: 字节=32 时间=7ms TTL=47 12 来自 14.215.177.39 的回复: 字节=32 时间=6ms TTL=47 13 来自 14.215.177.39 的回复: 字节=32 时间=7ms TTL=47 14 来自 14.215.177.39 的回复: 字节=32 时间=7ms TTL=47 15 16 14.215.177.39 的 Ping 统计信息: 17 数据包: 已发送 = 4,已接收 = 4,丢失 = 0 (0% 丢失), 18 往返行程的估计时间(以毫秒为单位): 19 最短 = 6ms,最长 = 7ms,平均 = 6ms 20 21 22 Process finished with exit code 0