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Python Programming - Lambda Functions - Discussion

Discussion Forum : Lambda Functions - General Questions (Q.No. 48)
Lambda Functions
48.
What does the following lambda function accomplish? 
lambda x: len(x) if isinstance(x, str) else None
Returns the length of a string and None for non-string values.
Filters out strings and returns None for non-string values.
Doubles the length of a string and returns None for non-string values.
Returns the square of the length of a string and None for non-string values.
Answer: Option
Explanation:
The lambda function returns the length of a string and None for non-string values.
Discussion:
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