# a = {'a': 'asdf'}
# b = a.copy()
# b['a'] = 'yo'
# print(a['a'])
# print(b['a'])
a = {'a': {'a': 'asdf'}}
b = a.copy()
b['a']['a'] = 'yo'
print(a['a']['a'])
print(b['a']['a'])
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