Plotting list of lists in a same graph in Python

Use a for loop to generate the plots and use the .show() method after the for loop.

 import matplotlib.pyplot as plt
 for impacts in impactData:
     timefilteredForce = plt.plot(impacts)
     timefilteredForce = plt.xlabel('points')
     timefilteredForce = plt.ylabel('Force')

 plt.show()

impactData is a list of lists.

Assuming some sample values for x, below is the code that could give you the desired output.

import matplotlib.pyplot as plt
x = [1,2,3]
y = [[1,2,3],[4,5,6],[7,8,9]]
plt.xlabel("X-axis")
plt.ylabel("Y-axis")
plt.title("A test graph")
for i in range(len(y[0])):
    plt.plot(x,[pt[i] for pt in y],label = 'id %s'%i)
plt.legend()
plt.show()

Assumptions: x and any element in y are of the same length. The idea is reading element by element so as to construct the list (x,y[0]'s), (x,y[1]'s) and (x,y[n]'s.

Edited: Adapt the code if y contains more lists.

Below is the plot I get for this case: