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from itertools import pairwise

# Compute deltas between consecutive readings
readings = [10, 13, 12, 18, 22]
deltas = [b - a for a, b in pairwise(readings)]
print(deltas)                  # [3, -1, 6, 4]

# Validate that a list is strictly increasing
def is_increasing(xs):
    return all(a < b for a, b in pairwise(xs))

print(is_increasing([1, 2, 5, 10]))   # True
print(is_increasing([1, 2, 2, 5]))    # False