原来代码如下

#coding=utf-8 

testF1= open("testFi.txt","r")

for line in testF1:
    print(line)

结果出现错误

UnicodeDecodeError: 'gbk' codec can't decode byte 0x80 in position 42: illegal multibyte sequence

改成

#coding=utf-8 

testF1= open("testFi.txt","rb")

for line in testF1:
    print(line)

出现错误

b'\xe4\xbc\x98\xe7\xbe\x8e\xe8\x83\x9c\xe4\xba\x8e\xe4\xb8\x91\xe9\x99\x8b\r\n'
b'\xe6\x98\x8e\xe4\xba\x86\xe8\x83\x9c\xe4\xba\x8e\xe9\x9a\x90\xe6\x99\xa6\r\n'
b'\xe7\xae\x80\xe6\xb4\x81\xe8\x83\x9c\xe4\xba\x8e\xe5\xa4\x8d\xe6\x9d\x82'

改成

testF1= open("testFi.txt","r",encoding='UTF-8')

for line in testF1:
    print(line)

结果正确

优美胜于丑陋

明了胜于隐晦

简洁胜于复杂