<jupyter_start><jupyter_text>bundle_of_tubes  Create a 3D image of a bundle of tubes, in the form of a rectangular plate with randomly sized holes through it.  Import packages<jupyter_code>import matplotlib.pyplot as plt
import numpy as np
import porespy as ps

ps.visualization.set_mpl_style()
np.random.seed(10)<jupyter_output><empty_output><jupyter_text>Generate image for testing<jupyter_code>im = ps.generators.bundle_of_tubes(shape=[500, 500], spacing=12)
plt.figure(figsize=[4, 4])
plt.axis(False)
plt.imshow(im);<jupyter_output><empty_output>
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