from dict_op import *

def main():
    """
        Different dicts for testing.
    """ 
    d1 = {}  
    """ Define five more dictionary for efficent testing here.
    """
    d2 = {'a': 100, 'b': 5, 'c': 1, 'd': 40}
    d3 = {'hello':1}
    d4 = {'a': 100, 'b': 100, 'c': -1, 'd': 40}
    d5 = {'a': 100, 'b': 'hello', 'c': 1, 'd': 40}
    d6 = {}     # to be updated.
    """
    Six test cases for the function get_max_value.
    """
    print(f"get_max_value({d1}): {get_max_value(d1)}")
    print(f"get_max_value({d2}): {get_max_value(d2)}")
    print(f"get_max_value({d3}): {get_max_value(d3)}")
    print(f"get_max_value({d4}): {get_max_value(d4)}")
    
    try:
        print(f"get_max_value({d5}): {get_max_value(d5)}")
    except Exception as e:
        # 'e' is the exception object; printing it shows the specific error message
        print("An error occurred:", e)
        print("Error type:", type(e).__name__)  # dunder
        
    print(f"get_max_value({d6}): {get_max_value(d6)}")

    """
    Six test cases for each of the other functions to be completed by you.
    """

if __name__ == '__main__':
    main()