python matplotlib.plot does not show chart

Question

Have recently started playing with Python. I have installed Python Spyder app on the Mac. Everything has been working well until recently for some reason the matplotlib charts stopped displaying. A simple code like this does not work anymore:

import matplotlib.pyplot as plt
x = np.linspace(0.4 * np.pi, 100)
plt.plot(x)

The only output is []

I have Spyder 2.3.3, Python 3.4.3 64 Bit.

Answer 1

您必须告诉剧情以以下方式展示自己：

plt.show()