Note : This is using python.

Some object is moving along a path in the plane. At n + 1 points of time we have recorded the corresponding (x, y) positions of the object: (x_0, y_0), (x_1, y_1), .... (x_n, y_n). L = sigma_i = 1^n Squareroot (x_i - x_i-1)^2 + (y_i - y_i - 1)^2. Write a function path length (x, y) for computing L according to the formula. The arguments x and y hold all the x_0, ..., x_n and y_0, .... y_n coordinates, respectively