d = {}
d['name'] = 'Bill'
d[10] = 20
d[True] = False
d[12.3] = 20.1

d[(1, 2, 3)] = [4 ,5 ,6]

class Person:
    pass

p1 = Person()
p2 = Person()

d[p1] = 'p1'
d[p2] = 'p2'

for k,v in d.items():
    print(k, ' - ', v)
    
print(d[12.3])

# 无法哈希
# d[[1, 2, 3]] = 3

# d[{'a': 3}] = 4

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name  -  Bill

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10  -  20

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True  -  False

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12.3  -  20.1

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(1, 2, 3)  -  [4, 5, 6]

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<__main__.Person object at 0x000001C757A3FE48>  -  p1

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<__main__.Person object at 0x000001C75802D0B8>  -  p2

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20.1

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