class Stroke:

"""Represents a single handwriting stroke with x,y coordinates."""

def __init__(self, list_of_coordinates=None):

"""Initialize a stroke from list of coordinate pairs.

Args:

list_of_coordinates (list, optional): List of (x,y) coordinate tuples

"""

self.x = []

self.y = []

if list_of_coordinates:

for point in list_of_coordinates:

self.x.append(point[0])

self.y.append(point[1])

def __len__(self):

return len(self.x)

def __getitem__(self, index):

return (self.x[index], self.y[index])

class Ink:

"""Container for multiple strokes comprising handwritten content."""

def __init__(self, list_of_strokes=None):

"""Initialize ink object with list of strokes.

Args:

list_of_strokes (list, optional): List of Stroke objects

"""

self.strokes = []

if list_of_strokes:

self.strokes = list_of_strokes

def __len__(self):

return len(self.strokes)

def __getitem__(self, index):

return self.strokes[index]