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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 weld_variance(array, weld_type):
 """Returns the variance of the array. Parameters array : numpy.ndarray or WeldObject Input array. weld_type : WeldType Type of each element in the input array. Returns ------- WeldObject Representation of this computation. """

    weld_obj_mean = weld_mean(array, weld_type)

    obj_id, weld_obj = create_weld_object(array)
    weld_obj_mean_id = get_weld_obj_id(weld_obj, weld_obj_mean)

    weld_template = _weld_variance_code

    weld_obj.weld_code = weld_template.format(array=obj_id,
                                              type=weld_type,
                                              mean=weld_obj_mean_id)

    return weld_obj