Fixed snippet

Python/Matplotlib/09-LiveData/snippets.txt

@@ -1,4 +1,17 @@
 # Another way to do it without clearing the Axis
+from itertools import count
+import pandas as pd
+import matplotlib.pyplot as plt
+from matplotlib.animation import FuncAnimation
+
+plt.style.use('fivethirtyeight')
+
+x_vals = []
+y_vals = []
+
+plt.plot([], [], label='Channel 1')
+plt.plot([], [], label='Channel 2')
+
 
 def animate(i):
     data = pd.read_csv('data.csv')
@@ -6,10 +19,12 @@ def animate(i):
     y1 = data['total_1']
     y2 = data['total_2']
 
+    ax = plt.gca()
+    line1, line2 = ax.lines
+
     line1.set_data(x, y1)
     line2.set_data(x, y2)
 
-    ax = plt.gca()
     xlim_low, xlim_high = ax.get_xlim()
     ylim_low, ylim_high = ax.get_ylim()
 
@@ -24,3 +39,10 @@ def animate(i):
     current_ymin = y1min if (y1min < y2min) else y2min
 
     ax.set_ylim((current_ymin - 5), (current_ymax + 5))
+
+
+ani = FuncAnimation(plt.gcf(), animate, interval=1000)
+
+plt.legend()
+plt.tight_layout()
+plt.show()