Not understanding dictionaries

[Larz60+]

use keys to get count:

>>> stuff={
...     'rope':1,'torch':6,'gold coins':45,'dagger':1,'arrow':12
... }
>>> def display_inventory(inventory):
...     print(f"\nInventory: Total items: {len(inventory.keys())}\n")
...     for key, value in inventory.items():
...         print(f"{key}: {value}")
... 
>>> display_inventory(stuff)

Inventory: Total items: 5

rope: 1
torch: 6
gold coins: 45
dagger: 1
arrow: 12