#creates an empty dictionary
keychain = {}
print(keychain)

#adds a key called key1, with the value car
keychain["key1"] = "car"
print(keychain)

#adds two more keys called key2 and key3, with values apartment and car2
keychain["key2"] = "apartment"
keychain["key3"] = "car2"

#removes key1 and its value from the dictionary
keychain.pop("key1")
print(keychain)

#adds key1 back in with value car
#then updates key1 value to mini-van
keychain["key1"] = "car"
print(keychain)
keychain["key1"] = "mini-van"
print(keychain)

#prints the value for key2
print(keychain["key2"])

#grabs all keys in dictionary and prints them
keys = keychain.keys()
print(keys)

#grabs all values in dictinoary and prints them
values = keychain.values()
print(values)

#prints a clean formated dictionary
keys = keychain.keys()
for x in keys:
    print(x, "goes to", keychain[x])