[Solved] The following code tries to multiply each element of a Python list by 2 using NumPy syntax but fails. What is the error?lst = [1, 2, 3, 4] result = lst * 2 print(result) | NumPy

NumPy - Fundamentals

The following code tries to multiply each element of a Python list by 2 using NumPy syntax but fails. What is the error?

lst = [1, 2, 3, 4]
result = lst * 2
print(result)

AIt raises a TypeError because lists cannot be multiplied.

BIt prints [2, 4, 6, 8] as expected.

CIt prints [1, 2, 3, 4, 1, 2, 3, 4] instead of doubling values.

DIt raises a NameError because 'lst' is undefined.

Step-by-Step Solution

Solution:

Step 1: Understand list multiplication behavior
Multiplying a Python list by 2 repeats the list elements, it does not multiply each element.
Step 2: Compare with NumPy array behavior
NumPy arrays multiply each element by 2, but Python lists just repeat the list when multiplied by an integer.
Final Answer:
It prints [1, 2, 3, 4, 1, 2, 3, 4] instead of doubling values. -> Option C
Quick Check:
List * 2 repeats list, does not multiply elements = C [OK]

Quick Trick: List * 2 repeats list; use np.array for element-wise multiply. [OK]

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