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### Solution: counting people in the maze¶

With this maze structure:

In [1]:
house = {
'living' : {
'exits': {
'north' : 'kitchen',
'outside' : 'garden',
'upstairs' : 'bedroom'
},
'people' : ['James'],
'capacity' : 2
},
'kitchen' : {
'exits': {
'south' : 'living'
},
'people' : [],
'capacity' : 1
},
'garden' : {
'exits': {
'inside' : 'living'
},
'people' : ['Sue'],
'capacity' : 3
},
'bedroom' : {
'exits': {
'downstairs' : 'living',
'jump' : 'garden'
},
'people' : [],
'capacity' : 1
}
}


We can count the occupants and capacity like this:

In [2]:
capacity = 0
occupancy = 0
for name, room in house.items():
capacity += room['capacity']
occupancy += len(room['people'])
print("House can fit {} people, and currently has: {}.".format(capacity,occupancy))

House can fit 7 people, and currently has: 2.


As a side note, note how we included the values of capacity and occupancy in the last line. This is a handy syntax for building strings that contain the values of variables. You can read more about it here or in the official do