我运行代码时不显示matplotlib查看器

Question

我是Python的新手，我正在努力通过介绍性的书籍＃34; Python Crash Course＆＃34;。我正在研究其中一个项目，即在matplotlib中建模随机游走。但是，当我运行文件＆＃34; Data_Vis.py＆＃34;时，我无法让查看器显示。此文件从文件＆＃34; random_walk.py＆＃34;中导入RandomWalk类。我能够以零错误运行这两个文件，但正如我所说，我希望看到生成的图形。在此先感谢您的帮助!!!

＆＃34; Data_Vis.py＆＃34;

from random import choice

class RandomWalk():

    def __init__(self,num_points=100):
        self.num_points = num_points

        self.x_values = [0]
        self.y_values = [0]

    def fill_walk(self):


        while len(self.x_values) < self.num_points:
            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

            if x_step == 0 and y_step == 0:
                continue

                next_x = self.x_values[-1] + x_step
                next_y = self.y_values[-1] + y_step

                self.x_values.append(next_x)
                self.y_values.append(next_y)

＆＃34; random_walk.py＆＃34;

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