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mateuszwolski2
5,504 PointsProblem .remove() doesn't see object in script.
/1.STARTING WITH THIS
states = [ 'ACTIVE', ['red', 'green', 'blue'], 'CANCELLED', 'FINISHED', 5, ]
/FIRST ATTEMPT
states = ['ACTIVE','CANCELLED','FINISHED'] states.remove(['ACTIVE']) colors = ['red','green','blue'] number = [5]
/Bummer! ValueError: list.remove(x): x not in list
/THIRD ATTEMPT
states = ['ACTIVE',['red', 'green', 'blue'],'CANCELLED','FINISHED',5] states.remove(['red', 'green', 'blue'])
/ Bummer! Don't change states directly!
DON'T KNOW WHAT TO DO !
states = [
'ACTIVE',
['red', 'green', 'blue'],
'CANCELLED',
'FINISHED',
5,
]
states.remove(['red'])
3 Answers
markmneimneh
14,132 Pointsre-posting due to formatting in earlier post
Hello
Let think about what we are trying to do.
we want to remove element 'red' from list ['red', 'green', 'blue'] which happens to be the 2nd element in the states list. Therefore, if I do something like this for demo only:
...html i=0 for iitem in states: print('I am index {} i is states list and my value is {}'.format(i,states[i])) i += 1
this should produce this output I am index 0 i is states list and my value is ACTIVE I am index 1 i is states list and my value is ['red', 'green', 'blue'] I am index 2 i is states list and my value is CANCELLED I am index 3 i is states list and my value is FINISHED I am index 4 i is states list and my value is 5
so clearly ['red', 'green', 'blue'] is index 1 in the states list.
so if we do this, we then can access 'red'
states = [ 'ACTIVE', ['red', 'green', 'blue'], 'CANCELLED', 'FINISHED', 5, ]
states[1].remove('red')
...
Hopefully, this helps clear the concept. If this answers your question, please mark the question as answered.
Alex Diaz
4,930 PointsFirst of all, keep the states.remove(5), it didn't ask you to remove it. Second, it wants you to remove the ENTIRE second item in the list, aka the list of colors. Not just 'red', use this to remove it. states.remove(['red', 'green', 'blue'])
markmneimneh
14,132 PointsHello
Let think about what we are trying to do.
we want to remove element 'red' from list ['red', 'green', 'blue'] which happens to be the 2nd element in the states list. Therefore, if I do something like this for demo only:
...html
i=0 for iitem in states: print('I am index {} i is states list and my value is {}'.format(i,states[i])) i += 1
this should produce this output I am index 0 i is states list and my value is ACTIVE I am index 1 i is states list and my value is ['red', 'green', 'blue'] I am index 2 i is states list and my value is CANCELLED I am index 3 i is states list and my value is FINISHED I am index 4 i is states list and my value is 5
so clearly ['red', 'green', 'blue'] is index 1 in the states list.
so if we do this, we then can access 'red'
states = [ 'ACTIVE', ['red', 'green', 'blue'], 'CANCELLED', 'FINISHED', 5, ]
states[1].remove('red')
...
Hopefully, this helps clear the concept. If this answers your question, please mark the question as answered.