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answerWhat will be the output of the following Python code?l=[1, 0, 2, 0, 'hello', '', []]list(filter(bool, l))Options[1, 0, 2, ‘hello’, ”, []][1, 2, ‘hello’]Error[1, 0, 2, 0, ‘hello’, ”, []]

Question

answerWhat will be the output of the following Python code?l=[1, 0, 2, 0, 'hello', '', []]list(filter(bool, l))Options[1, 0, 2, ‘hello’, ”, []][1, 2, ‘hello’]Error[1, 0, 2, 0, ‘hello’, ”, []]

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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 filter() function in Python takes in a function and a list as arguments. This function is used to filter out elements from a list.

  2. The bool() function converts a value to Boolean (True or False) using the standard truth testing procedure.

  3. In the given code, filter(bool, l) is used. This means that the filter() function will use bool() function to test each element in the list l.

  4. The bool() function will convert each element to either True or False. In Python, some values are considered False in a Boolean context, such as 0, empty strings, and empty lists. All other values are considered True.

  5. So, bool() function will return False for 0, '' (empty string), and [] (empty list) in the list l. And it will return True for 1, 2, and 'hello'.

  6. The filter() function then constructs a new list from elements of the original list l for which bool() function returned True.

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

This problem has been solved

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