Change these settings to improve matplotlib line plots in python 

Could you do a video on twinx? I have a csv file, and I'd like to on the fly add the columns to a single plot.. i.e. they columns all share the same x-axis, but have different scales/ranges. When I try to programmatically generate the axes, it has an error because I haven't declared an array of axes to hold the return of twinx(): import matplotlib.pyplot as plt #Single canvas and axes in which all the data will be placed fig, ax = plt.subplots(1, 1) #Generate additional Y-axes and save into array for easy access for i in range (5): axIdx [ i ] = ax.twinx() #ERROR How can I create an array of axes so that I can easily access and configure a particular y-series (moving its legend, setting its color, etc)?