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===== Python Help for Typical Situations in Homeworks =====

===Packages===

The following packages should be used. In the code examples, we assume that they are imported with the aliases as bellow.

<code>
import numpy as np                # for matrix computation and linear algebra
import matplotlib.pyplot as plt   # for drawing and image I/O
import scipy.io as sio            # for matlab file format output
</code>

===Matrices===

When there is a matrix required as an output data, we mean matrix implemented as ''np.array''.