
    Write a function that determines the largest price difference between any two parking rates throughout the day, where parking rates are provided as time-price pairs. The price differential helps parking operators understand the maximum price swing between peak and off-peak hours to ensure optimal dynamic pricing strategies.
    

    
def max_difference(test_list):
    """
    Write a function that determines the largest price difference between any two parking rates throughout the day, where parking rates are provided as time-price pairs. The price differential helps parking operators understand the maximum price swing between peak and off-peak hours to ensure optimal dynamic pricing strategies.
    

    """
def max_difference(test_list):
    """
    Write a function that determines the largest price difference between any two parking rates throughout the day, where parking rates are provided as time-price pairs. The price differential helps parking operators understand the maximum price swing between peak and off-peak hours to ensure optimal dynamic pricing strategies.
    

    """
    temp = [abs(b - a) for (a, b) in test_list]
    res = max(temp)
    return res