9b292db701a05ec2748be18d51a8bc52b98c646c,mlxtend/evaluate/decision_regions.py,,plot_decision_regions,#,15

Before Change

    

    if isinstance(y, list):
        y_ary = np.array(y)
    else:
        y_ary = y
    for a in (X, y_ary):
        if not isinstance(a, np.ndarray):

After Change

    if not isinstance(X, np.ndarray):
        raise ValueError("X must be a 2D NumPy array")
    if not isinstance(y, np.ndarray):
        raise ValueError("y must be a 1D NumPy array")
    if not np.issubdtype(y.dtype, np.integer):
        raise ValueError("y must have be an integer array. "
                         "Try passing the array as y.astype(np.integer)")

Instances