def _dotsum(x, y):

    if sparse.issparse(x):
        return x.multiply(y).sum()
    else:
        # This way usually avoids allocating a temporary.
        return np.dot(x.ravel(), y.ravel())
Returns the clickable element specified in clickdata,
dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/regression/mixed_linear_model.py/_dotsum--crossover with--dataset/ETHPy150Open scrapy/scrapy/scrapy/http/request/form.py/_get_clickable