Добрый вечер, кто-то знает python? # coding: utf8 d = '' with

Question

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Добрый вечер, кто-то знает python? # coding: utf8 d = '' with

open('s1.txt', 'r', 'utf8') as s:
for line in list(s.read().split('\n')): d += "'" + line
d += "',\n"
print(d)

выдает
line 3, in <module>
with open('s1.txt', 'r', 'utf8') as s:
TypeError: 'str' object cannot be interpreted as an integer
как исправить??