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Question #10: What gets printed? ```python foo = {'key1':'value1', 'key2':...
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Question #10: What gets printed?
```python
foo = {'key1':'value1', 'key2':'value2', 'key3':'value3'}
del foo['key1']
foo['key1'] = 'value_vew'
del foo['key2']
print(len(foo))```❌
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