Array? Please help.

[Dr. Pastor]

Many thanks to you all. (Extra thanks to Mr. Daniels.)

Dr. Pastor wrote:
> 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.
> (A pointer will point to the next byte to write to.)
> What would be the Pythonic way to do the above?
> Thanks for any guidance.