4.5 Using zip() to structure and flatten sequences
The zip() function interleaves values from several iterators or sequences. It will create n tuples from the values in each of the n input iterables or sequences. We used it in the previous section to interleave data points from two sets of samples, creating two-tuples.
The zip() function is a generator. It does not materialize a resulting collection.
The following is an example of code that shows what the zip() function does:
>>> xi = [1.47, 1.50, 1.52, 1.55, 1.57, 1.60, 1.63, 1.65,
... 1.68, 1.70, 1.73, 1.75, 1.78, 1.80, 1.83,]
>>> yi = [52.21, 53.12, 54.48, 55.84, 57.20, 58.57, 59.93, 61.29,
... 63.11, 64.47, 66.28, 68.10, 69.92, 72.19, 74.46,]
>>> zip(xi, yi)
<zip object at ...>
>>> pairs = list(zip(xi, yi))
>>> pairs[:3]
[(1.47, 52.21), (1.5, 53.12), (1.52, 54.48)]
>>> pairs[-3:]
[(1.78, 69...
