Python读取log文件报错“UnicodeDecodeError”

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问题描述：

写了一个读取log文件的Python脚本：

# -*- coding:utf-8 -*-
import os
import numpy as np
file = 'D:\pythonfile\test.log'

for line in open("test.log","r"):
    print(line)

但是在执行时报错：
执行代码报错：

Traceback (most recent call last):
  File "D:/pythonfile/my-test225.py", line 8, in <module>
    for line in open("test.log","r"):
UnicodeDecodeError: 'gbk' codec can't decode byte 0x80 in position 6946: illegal multibyte sequence

Process finished with exit code 1

报错如图：

问题原因：

这是因为日志编码格式和读取日志的解码格式不一致导致的

问题解决：

方法一，读取文件指定“encoding=‘UTF-8’：

# -*- coding:utf-8 -*-
import os
import numpy as np
file = 'D:\pythonfile\test.log'

for line in open("test.log","r",encoding='UTF-8'):
    print(line)

方法二，读取文件指定rb（rb 以二进制读模式打开）：

# -*- coding:utf-8 -*-
import os
import numpy as np
file = 'D:\pythonfile\test.log'

# for line in open("test.log","rb"):
    print(line)