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Educational explanations. 👍 Explanations cover why the correct answers are correct and why the wrong answers are wrong (when appropriate). E.g.: #q1, #q2, #q3 etc
Calm Quokka
This quiz is good but has some minor mistakes :
Wrong question form : question : Hos is defined the header of a function? correct way is : How is the header of a function defined?
Mispelled word in option : In correct answer of question : What is a generator? iterator is mispelled as interator
Wrong question grammar form : How do you can get the keys and the values of a dictionary `d`?
Sharp Squirrelauthor
Thank you so much for your suggestions!
Small Lizard
What is a generator? Generators are iterators, that you can use once. Yes, but generators are also objects. And their type is generator too. So correct answers are: "An object type", "A special object", "Something that mimes an interator"
Sharp Squirrelauthor
That makes sense to me, I'll add your suggestion when I can edit the quiz, thanks!
Small Lizard
Which is the builtin command to check the type of a variable? "isinstance is the preferred method to check the type of an object because it takes subclasses into account", but question doesn't say that we need to take subclasses into account, so "type" is correct answer too (maybe even more correct than isinstance)
Sharp Squirrelauthor
The question is tricky because I would suggest that type is used for other things... maybe I have to change that question to avoid misunderstanding.
Small Lizard
Which is the slice that took the elements from the 5th to 9th of a list l? Indexes in a Python list start from 0, yes. You say that indices in the question (5th and 9th) start from 1. I thought that they start from 0. I don't know which meaning is correct. Can you prove that your?
Sharp Squirrelauthor
I do not refer to the index, but to the element position. So, the elements of l will be: [1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, ...] , with index [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ...]. As a result, to select from the 5th to the 9th you need the indexes from 4 to 8 and that's why you have a slice [4:9].
Small Lizard
Sharp SquirrelI understand but I think that this should be pointed in the question.
Sharp Squirrelauthor
Small LizardOk, I'll make it explicit when I can edit the question.
Small Lizard
What can you return from a function? What is the difference between "Any Python object" and "Any result of a Python expression"? I think that there is no difference, and both answers are correct
Sharp SquirrelDo you mean this line? return_stmt ::= "return" [expression_list] Yes, we need to write "expression" after "return". This "expression" evaluates and becomes "Any result of a Python expression". But also, when "expression" evaluates, it becomes "Any Python object". So I still think that these options are identical
Sharp Squirrelauthor
Small LizardI understood your point. I wanted to be faithful to the definition, but I think it is better to remove this misunderstanding...
Sharp Squirrelauthor
I just want to thanks all the commenters and say that I modified the quiz with the proposed changes
Educational explanations. 👍 Explanations cover why the correct answers are correct and why the wrong answers are wrong (when appropriate). E.g.: #q1, #q2, #q3 etc
Wrong question form :
question : Hos is defined the header of a function?
correct way is : How is the header of a function defined?
Mispelled word in option :
In correct answer of question : What is a generator?
iterator is mispelled as interator
Wrong question grammar form :
How do you can get the keys and the values of a dictionary `d`?
Generators are iterators, that you can use once.
Yes, but generators are also objects. And their type is generator too.
So correct answers are: "An object type", "A special object", "Something that mimes an interator"
"isinstance is the preferred method to check the type of an object because it takes subclasses into account", but question doesn't say that we need to take subclasses into account, so "type" is correct answer too (maybe even more correct than isinstance)
Indexes in a Python list start from 0, yes.
You say that indices in the question (5th and 9th) start from 1. I thought that they start from 0. I don't know which meaning is correct. Can you prove that your?
[1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, ...]
, with index [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ...]. As a result, to select from the 5th to the 9th you need the indexes from 4 to 8 and that's why you have a slice [4:9].
What is the difference between "Any Python object" and "Any result of a Python expression"? I think that there is no difference, and both answers are correct
return_stmt ::= "return" [expression_list]
Yes, we need to write "expression" after "return". This "expression" evaluates and becomes "Any result of a Python expression". But also, when "expression" evaluates, it becomes "Any Python object". So I still think that these options are identical