Week6 Coding Exercise 4

#4
print("This program is written to return a list of items that exist as both a key and a value in a dictionary.\n")


#FUNCTION PROGRAM
def common_elements(expected_dict):
    common_elements=[]
    for key, value in expected_dict.items():
        if key in expected_dict.keys() and key in expected_dict.values():
            common_elements.append(key)

    print(f"Your dictionary is: {expected_dict}.\n\nThe common elements in your dictionary are: {common_elements}")


#MAIN PROGRAM
pair_list=[]
user_list=[]
user_dict={}

while True:
    try:
        number=abs(int(float(input("How many key-value pairs would you like to enter? "))))
        break
    except ValueError:
        print("That is a wrong input. You must provide an integer. Please, try again!\n")

print("\n")
for num in range(number):
    while True:
        try:
            input1,input2 = input("\nEnter each key-value pair separated by a comma: ").split(",")
            break
        except ValueError:
            print("Something is wrong with your inputs.\n\nRemember you have to enter just a pair of key and value at once, separated by a comma.\nAlso, no spaces are allow. Please try again!\n")


    pair_list=[input1,input2]
    user_list.append(pair_list)
user_dict=dict(user_list)

print("\n")
common_elements(user_dict)

print("\n")
repeat_factor=input("Would you like to run the program again?\nPlease, select either option A or B\nA) Yes\nB) No        ").upper()

if repeat_factor=="A":
    pair_list=[]
    user_list=[]
    user_dict={}

    while True:
        try:
            number=abs(int(float(input("How many key-value pairs would you like to enter? "))))
            break
        except ValueError:
            print("That is a wrong input. You must provide an integer. Please, try again!\n")

    for num in range(number):
        while True:
            try:
                input1,input2 = input("\nEnter each key-value pair separated by a comma: ").split(",")
                break
            except ValueError:
                print("Something is wrong with your inputs.\n\nRemember you have to enter just a pair of key and value at once, separated by a comma.\nAlso, no spaces are allow. Please try again!\n")

        pair_list=[input1,input2]
        user_list.append(pair_list)
    user_dict=dict(user_list)

    print("\n")
    common_elements(user_dict)

elif repeat_factor=="B":
        print("Thank your for using this program. See you next time!")

else:
    print("You entered an incorrect option. Your choices are only limited to A or B. Bye!")