python文档输出时乱码

Question

如题

#文件
student_data = [
    [101,"小张",98],
    [102,"小李",88],
    [106,"小陈",12],
]

#排序
def sort_grades(student_data):
    student_data = sorted(student_data,key=lambda x :int(x[2]))
    return student_data
#输出
def write_file(student_data):
    with open("./student.txt","w") as fout:
        for i in student_data:
            fout.write("".join(str(i))+"\n")#保证输出的数据以字符串的形式存在
write_file(student_data)

输出来的文件用txt打开可读，用pycharm打开时乱码，需用GBK打开无乱码
问：产生乱码原因？

Answer 1

写入文件时，带上编码参数：
with open("./student.txt","w", encoding='UTF-8') as fout: