﻿ Python: Calculate the difference between two iterables, without filtering duplicate values - w3resource

# Python: Calculate the difference between two iterables, without filtering duplicate values

## Python List: Exercise - 247 with Solution

Write a Python program to calculate the difference between two iterables, without filtering duplicate values.

• Create a set from y.
• Use a list comprehension on x to only keep values not contained in the previously created set, _y.

Sample Solution:

Python Code:

``````# Define a function 'difference' that takes two lists 'x' and 'y'.
# It converts 'y' into a set for faster membership checking.
# It returns a new list containing elements that are in 'x' but not in 'y'.
def difference(x, y):
_y = set(y)
return [item for item in x if item not in _y]

# Call the 'difference' function with two lists and print the result.
print(difference([1, 2, 3], [1, 2, 4]))
```
```

Sample Output:

```[3]
```

Flowchart:

Python Code Editor:

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

﻿