title: Matplotlib - MatplotlibDeprecationWarning
body: <p>I have made a program, that makes a random walk and plots it. And it works perfectly, but I get a warning every time I run the program. It says:</p>
  
  <pre><code>MatplotlibDeprecationWarning: 
  Adding an axes using the same arguments as a previous axes currently reuses the earlier instance.  
  In a future version, a new instance will always be created and returned.  Meanwhile, this warning can be suppressed,
  and the future behavior ensured, by passing a unique label to each axes instance.
  </code></pre>
  
  <p>The warning warns me about, when I try to remove the x and y axis in <code>rw_visual.py</code></p>
  
  <p>My <code>random_walk.py</code> (If you need to test it):</p>
  
  <pre><code>from random import choice
  
  class RandomWalk():
      """A class to generate random walks."""
  
      def __init__(self, num_points=5000):
          """Initialize attributes of a walk."""
          self.num_points = num_points
  
          # All walks start at (0, 0).
          self.x_values = [0]
          self.y_values = [0]
  
      def fill_walk(self):
          """Calculate all the points in the walk."""
  
          # Keep taking steps until the walk reaches the desired length.
          while len(self.x_values) &lt; 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 next x and y values.
              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)
  </code></pre>
  
  <p>My <code>rw_visual.py</code> (Where the warning occurs):</p>
  
  <pre><code>import matplotlib.pyplot as plt
  
  from random_walk import RandomWalk
  
  # Keep making new walks, as long as the program is active.
  while True:
      # Make random walk, and plot the points.
      rw = RandomWalk()
      rw.fill_walk()
  
      point_numbers = list(range(rw.num_points))
      plt.scatter(rw.x_values, rw.y_values, c=point_numbers, cmap=plt.cm.Blues,
                  edgecolor='none', s=10)
  
      # Emphasize the first and last points.
      plt.scatter(0, 0, c='green', edgecolors='none', s=150)
      plt.scatter(rw.x_values[-1], rw.y_values[-1], c='red', edgecolors='none',
                  s=150)
  
      # Remove the axes.
      plt.axes().get_xaxis().set_visible(False) # This is what it warns me about, I think.
      plt.axes().get_yaxis().set_visible(False) # It also warns me about this.
      plt.show()
  
      keep_running = input("Make another walk? (y/n): ")
      if keep_running == 'n':
          break
  </code></pre>
  
  <p>Any help is appreciated. Thanks!</p>