db.py

#! python 3
#  db.py - database query program


Houses = {'San Francisco' : '$1,375,000', 'New York City' : '$1,600,000', 'Austin' : '$579,000'}
Cars = {'F-Type' : '80,000', 'Aventador' : '400,000', 'Civic' : '25,000'}
Laptops = {'Surface 4' : '1000', 'MacBook Pro' : '3000', 'ThinkPad' : '1300'}


subjects = [Houses, Cars, Laptops]

# It wasn't working because it was checking if 'Houses',
# a string, was in subjects instead of Houses, a variable.
# I was able to fix this (with help of NARCeric) by using eval on subjectInput.

def dbSearch(subject, item):
    if subject in subjects:
        print(subject[item])
    else:
        print('That subject doesn\'t exist.')



print('enter a subject')
subjectInput = eval(input())
print('enter an item')
itemInput = input()
dbSearch(subjectInput, itemInput)