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random_walk.py
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random_walk.py
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from random import choice
class RandomWalk:
'''A class to geerate random walks'''
def __init__(self, num_points=5000):
'''Initialize attributes of a walk'''
self.num_points = num_points
'''Note that all walks begin at (0,0)'''
self.x_values = [0]
self.y_values = [0]
def fill_walk(self):
"""Calculates all the points in the walk"""
# Keep moving untill the desired length is archieved
while len(self.x_values) < self.num_points:
# Decide which direction to go and how far to go in that direction.
x_direction = choice([1, -1])
x_distance = choice([0, 1, 2, 3, 4])
x_step = x_direction * x_distance
y_direction = choice([1, -1])
y_distance = choice([0, 1, 2, 3, 4])
y_step = y_direction * y_distance
# Reject moves that go nowhere.
if x_step == 0 and y_step == 0:
continue
# Calculate the new position.
x = self.x_values[-1] + x_step
y = self.y_values[-1] + y_step
self.x_values.append(x)
self.y_values.append(y)