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Stuck on challenge task asking for list items starting with A
Hi everyone! I am stuck on the challenge item asking for continents list with only continents starting with A. I went back to the video and it is not in there. I then tried to research online but I didn't find the right code. Finally, I tried using remove to take the items out of the list that didn't begin with A (which I know is neither DRY nor correct...but maybe tricky for an attempt?) Anyway, I'm stuck. I would appreciate some help. Thanks!!
continents = [ 'Asia', 'South America', 'North America', 'Africa', 'Europe', 'Antarctica', 'Australia', ] # Your code here print("continents: ") for continent in continents: print("* " + continent) A_list1 = continents.remove("South America") A_list2 = A_list1.remove("North America") A_list3 = A_list2.remove("Europe") print(A_list3)
The hint given for challenge 2 is
HINT: Remember that you can access characters in a string by index. In particular,
continent gives the first letter of the
Try using an
if statement to compare the first letter to
"A" before printing the continent name.
A_list1 = continents.remove("South America") removes
"South America" from
continents, and sets
A_list1 to None.
A_list2 = A_list1.remove("North America") attempts to call
None, which gives an
AttributeError: 'NoneType' object has no attribute 'remove'.
To modify the
continents.remove("South America") continents.remove("North America") continents.remove("Europe") print(continents)
This does not pass the challenge, since the
continents array isn't meant to be modified and the array isn't printed in the format specified in the first part of the challenge. You could instead create a copy of the
continents array and remove elements from the copy without modifying the original
continentsA = continents[:] continentsA.remove("South America") continentsA.remove("North America") continentsA.remove("Europe") for continent in continentsA: print("* " + continent)
Thank you very much for offering me support. This is my very first course in Python, and I wasn't really having any difficulties until now. I saw the hint, but I honestly don't have a clue what access characters by index means. I have watched all the videos and completed all the tests and exercises, but I am really not understanding this one. Thanks again for your help.