python open报错：‘gbk‘ codec can‘t decode byte 0xbd in position xxxx: illegal multibyte sequence

python 打开文件：

f = open(logpath, 'r') buff = f.read()

出错：UnicodeDecodeError: 'gbk' codec can't decode byte 0xbd in position 135129: illegal multibyte sequence

解决办法：

f = open(logpath, 'r', encoding='utf-8')