Length of the polyline

Write a Python function named calc_line_length(line) that calculates the length of the polyline $\vec{L}=\left((x_0, y_0), (x_1, y_1), \cdots, (x_{n-1}, y_{n-1})\right)$. Please create a new Python script with this function only. Name it FirstLastname_calc_line_length.py.