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Listing 5 shows how to modify an item in a list using a subscription.
| Listing 5 . Answer 18. |
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listA = [3.14,59,"A string",1024]
listA[2]= "New string" |
Go back to Question 18
Listing 4 shows how to concatenate two lists.
| Listing 4 . Answer 17. |
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listA = [3.14,59,"A string",1024]
listB = [2,4,6,16]listC = listA + listB |
Go back to Question 17
Listing 3 shows how to access a slice from a list.
| Listing 3 . Answer 16. |
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print(theList[0:3]) |
Go back to Question 16
Listing 2 shows how to access an item in a list using a subscription.
| Listing 2 . Answer 15. |
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print(theList[2]) |
Go back to Question 15
Listing 1 shows a simple list.
| Listing 1 . Answer 14. |
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theList = [3.14,59,"A string",1024] |
Go back to Question 14
Lists are formed by placing a comma-separated sequence of expressions in square brackets.
Go back to Question 13
The items of a list are arbitrary Python objects.
Go back to Question 12
False. The characters in a string cannot be modified after the string is created.
Go back to Question 11
True. A string is a sequence.
Go back to Question 10
Mutable sequences can be changed after they are created.
Go back to Question 9
A dictionary.
Go back to Question 8
False. There is no character type in Python. Rather, a string's items are characters. A character is not a separate data type but a string containingexactly one character.
Go back to Question 7
The last item in the sequence is selected for an index value of -1.
Go back to Question 6
False. The integers may be positive or negative.
Go back to Question 5
If the primary is a sequence , the expression_list must evaluate to an integer or a slice.
Go back to Question 4
The primary must evaluate to an object of a sequence or mapping type.
Go back to Question 3
string, tuple and list and possibly range object
Go back to Question 2
False in the Python context. In Python, A subscription selects an item of a sequence object.
Go back to Question 1
This section contains a variety of miscellaneous information.
Financial : Although the Connexions site makes it possible for you to download aPDF file for this module at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, youshould be aware that some of the HTML elements in this module may not translate well into PDF.
I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version of the module.
In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale onAmazon.com showing me as the author. I neither receive compensation for those sales nor do I know who does receive compensation. If youpurchase such a book, please be aware that it is a copy of a module that is freely available on cnx.org and that it was made andpublished without my prior knowledge.
Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.
-end-
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