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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def distance2_to_line(pt, l0, l1):
    '''The perpendicular distance squared from a point to a line
    
    pt - point in question
    l0 - one point on the line
    l1 - another point on the line
    '''
    pt = np.atleast_1d(pt)
    l0 = np.atleast_1d(l0)
    l1 = np.atleast_1d(l1)
    reshape = pt.ndim == 1
    if reshape:
        pt.shape = l0.shape = l1.shape = (1, pt.shape[0])
    result = (((l0[:,0] - l1[:,0]) * (l0[:,1] - pt[:,1]) - 
               (l0[:,0] - pt[:,0]) * (l0[:,1] - l1[:,1]))**2 /
              np.sum((l1-l0)**2, 1))
    if reshape:
        result = result[0]
    return result