[Solved] Identify the syntax error in this polymorphic function:def transform(value): if isinstance(value, list): return value + [1] elif isinstance(value, str): return value.upper() else return None | Python

Python - Polymorphism and Dynamic Behavior

Identify the syntax error in this polymorphic function:

def transform(value):
    if isinstance(value, list):
        return value + [1]
    elif isinstance(value, str):
        return value.upper()
    else
        return None

ACalling upper() on a list

BIncorrect use of isinstance for list

CUsing + operator on list and int

DMissing colon after else statement

Step-by-Step Solution

Solution:

Step 1: Review the else statement syntax
In Python, the else statement must end with a colon (:).
Step 2: Check the given code
The else line is written as else without a colon, causing a syntax error.
Step 3: Verify other parts
Using isinstance(value, list) and value + [1] is valid; value.upper() is valid for strings.
Final Answer:
Missing colon after else statement -> Option D
Quick Check:
Always add colon after else [OK]

Quick Trick: Check colons after else, if, elif statements [OK]

Common Mistakes:

Forgetting colon after else
Misusing operators on incompatible types
Calling string methods on non-string types

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More Python Quizzes

Identify the syntax error in this polymorphic function:

Step 1: Review the else statement syntax

Step 2: Check the given code

Step 3: Verify other parts

Final Answer:

Quick Check:

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