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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 get_span_char_width(span, column_widths):
 """ Sum the widths of the columns that make up the span, plus the extra. Parameters span : list of lists of int list of [row, column] pairs that make up the span column_widths : list of int The widths of the columns that make up the table Returns ------- total_width : int The total width of the span """


    start_column = span[0][1]
    column_count = get_span_column_count(span)
    total_width = 0

    for i in range(start_column, start_column + column_count):
        total_width += column_widths[i]

    total_width += column_count - 1

    return total_width