def get_min(array):
    """Get minimum value of an array. Automatically ignore invalid data.

    **中文文档**

    获得最小值。
    """
    smallest = np.inf
    for i in array:
        try:
            if i < smallest:
                smallest = i
        except:
            pass
    if np.isinf(smallest):
        raise ValueError("there's no numeric value in array!")
    else:
        return smallest