mathematics support plotting data including multi-dimensional plots (surfaces)

I can successfully plot (show below) using python3.5 with a support package using anaconda. How do I add this capability to PyCharm4.5? It does not recognize import matplotlib.pyplot as pet and I am not sure how to add this to PyCharm.

import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(0, 2 * np.pi)
offsets = np.linspace(0, 2*np.pi, 4, endpoint=False)
  1. Create array with shifted-sine curve along each column
yy = np.transpose([np.sin(x + phi) for phi in offsets])

plt.rc('lines', linewidth=4)
fig, (ax0, ax1)  = plt.subplots(nrows=2)

plt.rc('axes', color_cycle=['r', 'g', 'b', 'y'])
ax0.set_title('Set default color cycle to rgby')

ax1.set_color_cycle(['c', 'm', 'y', 'k'])
ax1.set_title('Set axes color cycle to cmyk')

  1. Tweak spacing between subplots to prevent labels from overlapping

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