Python realtime plotting

Question

I acquire some data in two arrays: one for the time, and one for the value. When I reach 1000 points, I trigger a signal and plot these points (x=time, y=value).

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Answer 1

Use a fixed size array and plot that using matplot.

 import collections
 array = collections.deque([None] * 1000, maxlen=1000)

Whenver you append to the array it will remove the first element.