Format timestams on x axis using matplotlib

[igorv]

How to show timestamps on x axis as "%Y-%m-%d %H:%M". ts is list of timestamps and how to show on x axis only values "2018-5-23 14:00", "2018-5-23 14:15" and "2018-5-23 14:30".
My current chart shows: 23 14:00, 23 14:05, 23 14:10, 23 14:15, 23 14:20, 23 14:25, 23 14:30.
Chart

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import datetime import matplotlib.pyplot as plt from matplotlib import style style.use('fivethirtyeight')   ts = [datetime.datetime(2018, 5, 23, 14, 0), datetime.datetime(2018, 5, 23, 14, 15), datetime.datetime(2018, 5, 23, 14, 30)] values =[3, 7, 6] plt.plot(ts, values, 'o-') plt.show()