Remove list from list in Python [duplicate]

You can write this using a list comprehension which tells us quite literally which elements need to end up in new_list:

a = ['apple', 'carrot', 'lemon']
b = ['pineapple', 'apple', 'tomato']

# This gives us: new_list = ['carrot' , 'lemon']
new_list = [fruit for fruit in a if fruit not in b]

Or, using a for loop:

new_list = []
for fruit in a:
    if fruit not in b:
        new_list.append(fruit)

As you can see these approaches are quite similar which is why Python also has list comprehensions to easily construct lists.