person = {"Name": "Sarah", "Age":"18"}

Question

Can someone break down this code and explain why it brings out 'a' please?
print(person) outputs the result with the +18 value in.
person = {"Name": "Sarah", "Age":"18"}
person["Name"] = "Sia"
person["Age"] = "18+"
if '18+' not in person:
print('a')
else:
print('b')

Answer 1

the in operator check if a key is in the dictionary. It does not check for values. Since '18+' is a value, '18+' in person will be false.
you might want to use the values() method of the dictionary
if '18+' not in person.values():
print('a')
else:
print('b')
but given the context, it's better to check for the age directly.
if person['Age'] == '18+':
I hope this helps :)

Answer 2

Makes sense now, thanks mate.