Easy

Comparing Values: == and is

~9 mincode completion

Write that returns:

  • "missing" when the value is
  • "empty" when it is an empty list
  • "present" for anything else, including 0 and an empty string

Examples

None is missing

Input
describe(None)
Output
"missing"

An empty list is empty

Input
describe([])
Output
"empty"

Zero is a real value, so it is present, not missing

Input
describe(0)
Output
"present"

Hints

Hint 1

Work directly with the arguments value and return the result rather than printing it.

Hint 2

Watch for this: used falsy check for none.

Requirements

  • value: anything, possibly None

  • Return "missing" for None, "empty" for [], "present" otherwise.

Constraints

  • Standard library only, no imports required

  • Time limit: 200 ms, Memory: 64 MB

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Where this shows up

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3 employers weight this skill

2 frontier labs, 1 AI product company. Top match scores 80.

Python
def describe(value):
    """
    Classify a value as missing, empty, or present.

    Args:
        value: anything, possibly None

    Returns:
        "missing" for None, "empty" for [], "present" otherwise.
    """
    # YOUR CODE HERE
    pass
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