38 lines
1.1 KiB
Python
38 lines
1.1 KiB
Python
from random import choice
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class RandomWalk:
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"""A class to generate random walks."""
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def __init__(self, num_points=5000):
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"""Initialize attributes of a walk."""
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self.num_points = num_points
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# All walks start at (0, 0).
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self.x_values = [0]
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self.y_values = [0]
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def fill_walk(self):
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"""Calculate all the points in the walk."""
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# Keep taking steps until the walk reaches the desired length.
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while len(self.x_values) < self.num_points:
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# Decide which direction to go, and how far to go.
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x_direction = choice([1, -1])
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x_distance = choice([0, 1, 2, 3, 4])
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x_step = x_direction * x_distance
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y_direction = choice([1, -1])
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y_distance = choice([0, 1, 2, 3, 4])
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y_step = y_direction * y_distance
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# Reject moves that go nowhere.
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if x_step == 0 and y_step == 0:
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continue
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# Calculate the new position.
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x = self.x_values[-1] + x_step
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y = self.y_values[-1] + y_step
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self.x_values.append(x)
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self.y_values.append(y) |