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GO Classes DPP | GATE DA | Python Programming | Dictionary Methods

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1 1 vote

Consider the following Python code:

data = {"a": 2, "b": 3}

for key in ["a", "c", "b", "a"]:
 data[key] = data.get(key, 0) + 1

print(data)

What is the output of the code above?

  1. {'a': 4, 'b': 4, 'c': 1}
  2. {'a': 3, 'b': 4, 'c': 1}
  3. {'a': 4, 'c': 1, 'b': 4}
  4. {'a': 2, 'b': 3, 'c': 1}

1 Answer

0 0 votes

The dictionary starts as:

{'a': 2, 'b': 3}

For $\texttt{"a"}$, the value becomes $\texttt{3}$.

For $\texttt{"c"}$, the key does not exist, so $\texttt{data.get("c", 0)}$ gives $\texttt{0}$. Then $\texttt{c}$ becomes $\texttt{1}$.

For $\texttt{"b"}$, the value becomes $\texttt{4}$.

For $\texttt{"a"}$ again, the value becomes $\texttt{4}$.

{'a': 4, 'b': 4, 'c': 1}

Correct Option: A

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