Python Constructing the left-hand coefficient matrix:
<p>Constructing the left-hand coefficient matrix: Write a function which, when given
a list of chemical species and a list of elements, will return a 2-D array representing
the right-hand coefficient matrix A in either (3) or (7). Example: calling your func-tion with inputs of ['CO', 'H2O', 'CO2'] and ['C', 'H', 'O'] should return an
output of array([[1, 0, 1], [0, 2, 0], [1, 1, 2]]). Hint: column vectors c1,
c2, c3 and c4 can be assembled into a matrix with c [c1, c2, c3, c4] in SciPy.</p>

<p>so I'm thinking import scipy but I dont know how to start this...</p>
