Не могу открыть файл в python

Question

f = open("D:\positive.txt")
r = f.read()
print(r)

Получается вот такой стек ошибки:

Traceback (most recent call last):
  File "D:/perforce/Social/test4.py", line 2, in <module>
    r = f.read()
  File "D:\Minicanoda3\lib\encodings\cp1251.py", line 23, in decode
    return codecs.charmap_decode(input,self.errors,decoding_table)[0]
UnicodeDecodeError: 'charmap' codec can't decode byte 0x98 in position 11943: character maps to <undefined>

Answer 1

f = open("D:\positive.txt", encoding='utf-8')
r = f.read()
print(r)