isainum() checks if a string contains only letters and digits, and this is:

The correct answer is C. A method. isalnum() (note the correct spelling) is a string method because it belongs to Python's built-in str class and is called directly on a string object - e.g., "abc123".isalnum() - using dot notation. It is not a module (option A), since modules are importable packages like math…

Question

isainum() checks if a string contains only letters and digits, and this is:

Options

AA module
BA function
CA method

How the community answered

(39 responses)

A
13% (5)
B
8% (3)
C
79% (31)

Explanation

isalnum() (note the correct spelling) is a string method because it belongs to Python's built-in str class and is called directly on a string object - e.g., "abc123".isalnum() - using dot notation. It is not a module (option A), since modules are importable packages like math or os that group related functionality together. It is not a standalone function (option B) either, because functions are called independently - like len("abc") - rather than being owned by an object. A helpful memory tip: if you call it with a dot on a string ("text".isalnum()), it's a method; methods always belong to an object, while functions stand alone.

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