typeerror in basic example for legend handles in matplotlib

Question

I have difficulties to understand the legend handling. The more, the basic example from the official matplotlib legend guide

import matplotlib.pyplot as plt         


        

Answer 1

Just remove handles keyword

Use it like that:

import matplotlib.pyplot as plt
line_up, = plt.plot([1,2,3], label='Line 2')
line_down, = plt.plot([3,2,1], label='Line 1')
plt.legend([line_up, line_down])