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’, ”, []]
Solution
The output of the given Python code will be [1, 2, 'hello'].
Here's the step by step explanation:
-
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. -
The
bool()function converts a value to Boolean (True or False) using the standard truth testing procedure. -
In the given code,
filter(bool, l)is used. This means that thefilter()function will usebool()function to test each element in the listl. -
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. -
So,
bool()function will return False for 0, '' (empty string), and [] (empty list) in the listl. And it will return True for 1, 2, and 'hello'. -
The
filter()function then constructs a new list from elements of the original listlfor whichbool()function returned True. -
Therefore, the output of the code will be [1, 2, 'hello'].
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