from sys import exit

# a dictionary has keys and values, names and numbers in this case
# could be words and definition
people = {
    "Lucio": "617-868-8543",
    "Jackie": "617-876-9580",
    "Matthew": "617-864-2838",
    "Jacob": "617-519-3820",
}

if "Jacob" in people:
    print(f"Found {people['Jacob']}") # will print the value that was associated with the string jacob
    exit(0)
else:
    print("not found")
for person in people: ## this does not work... ask reddit how i might print every item in dictionary
    print(person)
print(" {people['jackie']}  prints") # why won't this print? it's just a string
print(f"{people['jackie']}") # this doesn't print anything as it does above
# pythonic way of asking if a value is in the dictionary
# you can treat it like an array where instead of the indices are numbers, the indices are words
# key value pairs keys are strings