Saturday 25 November 2023

What will be the output of the following Python code ?

Code : 

s = [a + b for a in ['They ', 'We '] for b in ['are gone!', 'have come!']]

print(s)


Solution and Explanation :  

This code uses list comprehension to create a list s by concatenating elements from two nested lists. Here's the breakdown:

s = [a + b for a in ['They ', 'We '] for b in ['are gone!', 'have come!']]

Two nested for loops are used in the list comprehension.

The outer loop iterates over elements a in the list ['They ', 'We '].

The inner loop iterates over elements b in the list ['are gone!', 'have come!'].

The expression a + b concatenates the current elements from both loops.

The result is a new list s containing all possible concatenations of elements from the outer and inner loops.

If you print the list s, you will get:

['They are gone!', 'They have come!', 'We are gone!', 'We have come!']

This is because it combines each element from the first list with each element from the second list, resulting in all possible combinations.

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