Error Library ssd1306

I get this library to work a week ago and now it flags errors  Any Ideas.  Took this right from the esp32 book Micropython
download ok
exec(open(‘ssd1306.py’).read(),globals())
Traceback (most recent call last):
File “<stdin>”, line 1, in <module>
File “<string>”, line 166, in <module>
NameError: name ‘self’ isn’t defined