Array?

[Dr. Pastor]

I need a row of 127 bytes that I will use as a
circular buffer. Into the bytes (at unspecified times)
a mark (0<mark<128) will be written, one after the other.
After some time the "buffer" will contain the last 127 marks
and a pointer will point the next "usable" byte.
What would be the Pythonic way to do the above?
Thanks for any guidance.
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