Plotting the data in a time-series manner for multiple attributes

Question

I am trying to visualize the data in Jupyter notebook based in the shape of time-series. The data is representing the sales of a store for each month of years 2013, 2014 and 2015. So, each year should be represented by a line, where x axis is the months and y axis shows the sales. Even though, I can select the data in a table, I have difficulties plotting them on a time-series chart. What is the best way to actually plot this data in Jupyter notebook?

The data looks like the following:

Answer 1

尝试：

monthlySales['sales'].unstack().plot()