有没有一种方法可以在python的if语句中向字典添加项目？

Question

I am making a text-based adventure game, and am trying to add an item to a directory on the basis that the player has a key in their inventory.

I have tried every solution I could find, and none of them worked. I think this is maybe because I have a different syntax to the other dictionaries.

    if 'key' in inventory:
    print('Well done for killing all monsters on the first floor! You can 
    now 
    travel upstairs from the hall')
    'Hall' ['upstairs'] = 'Landing'

     'Hall' : {
              'south' : 'Kitchen',
              'east'  : 'Dining Room',
              'north' : 'Library',
              'west' : 'Game Room',
            }, 

Please tell me another way to put

    'Hall' ['upstairs'] = 'Landing'

without changing all of the directory, as I have numerous other rooms.

Answer 1

You mentioned your "different syntax", which I am not familar with - so I guess this is actually where your problems arise. See my Adaptations bellow - is this the behavior you expected?

Hall = {
    'south': 'Kitchen',
    'east': 'Dining Room',
    'north': 'Library',
    'west': 'Game Room',
}

inventory = ['key']

if 'key' in inventory:
    print('Well done for killing all monsters on the first floor! You can now travel upstairs from the hall')
    Hall['upstairs'] = 'Landing'

print(Hall)
# Output: {'south': 'Kitchen', 'east': 'Dining Room', 'north': 'Library', 'west': 'Game Room', 'upstairs': 'Landing'}

Note: You need to define your dictionary Hall before you can assign key-value-pairs like this Hall['upstairs'] = 'Landing' .