Exercise for reference: 

Create a program that asks the user to enter a new password and check that the submitted password should contain at least one number, one uppercase letter, and at least 5 characters. If the conditions are met, print out the reason why pointing to the specific condition/s that has not been satisfied.

Answer: 

while True:
    notes = []
    psw = input("Enter password: ")
    if not any(i.isdigit() for i in psw):
        notes.append("You need at least one number")
    if not any(i.isupper() for i in psw):
        notes.append("You need at least one uppercase letter")
    if len(psw) < 5:
        notes.append("You need at least 5 characters")
    if len(notes) == 0:
        print("Password is fine")
        break
    else:
        print("Please check the following: ")
        for note in notes:
            print(note)

Explanation:

Again, we're using a while loop. In the first if  condition, we check if there is any number in the submitted password, and if there is, we append a message string to the notes  list. Then, we check the next conditions in the next two if  conditionals and keep adding messages to notes . We also check if the length of notes  is zero because it if is, that means there was no message added there, which means the password is fine. Lastly, under else , we iterate through the constructed list and print out its items (i.e., messages).