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Post #1187 2.77K
Что выведет код?
from collections import ChainMap
a = {'x': 1, 'z': 3 }
b = {'y': 2, 'z': 4 }
c = ChainMap(a, b)
a['x'] = 10
c['y'] = 20
c['z'] = 30 
print(c['x'], b['y'], a['z'], b['z'])
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