[Solved] Identify the error in this input validation function:def check_input(data): if data == None: return False return True | Agentic AI

Agentic AI - Agent Safety and Guardrails

Identify the error in this input validation function:

def check_input(data):
    if data == None:
        return False
    return True

ANo error, function is correct

BMissing return statement

CIncorrect indentation

DUsing '==' instead of 'is' to check None

Step-by-Step Solution

Solution:

Step 1: Review None checking best practice
In Python, 'is' should be used to check None, not '=='.
Step 2: Identify why '==' is problematic
'==' can cause unexpected behavior if __eq__ is overridden; 'is' checks identity safely.
Final Answer:
Using '==' instead of 'is' to check None -> Option D
Quick Check:
Check None with 'is' not '==' [OK]

Quick Trick: Use 'is None' to check None values [OK]

Common Mistakes:

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