Question

{x:x/2 for x in range(1,5)}

Study the dictionary comprehension above and then type what it outputs.

Answer 1

The given dictionary comprehension outputs: `{1: 0.5, 2: 1.0, 3: 1.5, 4: 2.0}`. It pairs each number from 1 to 4 with its corresponding value obtained by dividing it by 2.

The given dictionary comprehension is using a generator expression to create a dictionary where the keys are the elements from the range 1 to 4 (exclusive), and the values are the corresponding elements divided by 2. The syntax `{x: x/2 for x in range(1, 5)}` is a concise way to express this.

Now, evaluating the expression:

`\[ \{1: (1)/(2), 2: (2)/(2), 3: (3)/(2), 4: (4)/(2)\} \]`

Simplifying the fractions:

{1: 0.5, 2: 1.0, 3: 1.5, 4: 2.0}

So, the output of the given dictionary comprehension is:

{1: 0.5, 2: 1.0, 3: 1.5, 4: 2.0}