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What will be the output of the following Python code?l=[1, 0, 2, 0, 'hello', '', []]list(filter(bool, l))

Question

What will be the output of the following Python code?l=[1, 0, 2, 0, 'hello', '', []]list(filter(bool, l))

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Solution

The output of the given Python code will be [1, 2, 'hello'].

Here's the step by step explanation:

  1. The given code is a list in Python that contains various elements - integers, strings, and an empty list.

  2. The built-in function filter() in Python takes in two arguments: a function and a list. The function is called with all the items in the list and a new list is returned which contains items for which the function evaluates to True.

  3. In this case, the function used is bool(). The bool() function converts a value to Boolean (True or False) using the standard truth testing procedure.

  4. The bool() function is called for all items in the list. For the integers, bool(1) returns True and bool(0) returns False. For the strings, bool('hello') returns True and bool('') (empty string) returns False. For the empty list, bool([]) returns False.

  5. The filter() function then constructs a new list from elements of the original list for which bool() returned True. Hence, the elements 1, 2, and 'hello' are included in the new list.

  6. Therefore, the output of the code will be [1, 2, 'hello'].

This problem has been solved

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