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This module is one in a collection of modules on Python designed for teaching ITSE 1359 Introduction to Scripting Languages: Python at Austin Community College in Austin, TX.
This module contains review questions and answers keyed to the module titled Itse1359-1120-Empty and Single-Item Tuples .
Once you study that module, you should be able to answer the review questions in this module.
The questions and the answers in this module are connected by hyperlinks to make it easy for you to navigate from the question to the answer and back again.
(Note to blind and visually impaired students: with the exception of two bitmap images that are used solely as spacers to separate the questionsection from the answer section, all of the material in this module is presented in plain text format and should be accessible using an audio screen reader or abraille display.)
True or False? The code in Figure 1 creates and prints an empty tuple producing the output shown in Figure 2 .
| Figure 1 . Question 1 program code. |
|---|
t1 =
print(t1)print(len(t1)) |
| Figure 2 . Question 1 possible output. |
|---|
()
0 |
Go to answer 1
True or False? The code in Figure 4 creates and prints an empty tuple producing the output shown in Figure 5 .
| Figure 4 . Question 2 program code. |
|---|
t1 = ()
print(t1)print(len(t1)) |
| Figure 5 . Question 2 possible output. |
|---|
()
0 |
Go to answer 2
True or False? The code in Figure 6 produces the output shown in Figure 7 .
| Figure 6 . Question 3 program code. |
|---|
t2 = ("a")
print(t2) |
| Figure 7 . Question 3 possible output. |
|---|
('a') |
Go to answer 3
True or False? The code in Figure 9 produces the output shown in Figure 10 .
| Figure 9 . Question 4 program code. |
|---|
t2 = ("a",)
print(t2) |
| Figure 10 . Question 4 possible output. |
|---|
('a',) |
Go to answer 4
True or False? The code in Figure 11 produces the output shown in Figure 12 .
| Figure 11 . Question 5 program code. |
|---|
t1 = ()
print(t1)print(len(t1))
t2 = ("a",)print(t2)
print(len(t2))t3 = "A",t1,"B",(t2,"Z"),"C"
print(t3)print(t3[3][0])
print(len(t3)) |
| Figure 12 . Question 5 possible output. |
|---|
()
0('a',)
1('A', (), 'B', (('a',), 'Z'), 'C')
('a',)5 |
Go to answer 5
What is the meaning of the following two images?
These images were inserted here simply to insert some space between the questions and the answers to keep them from being visible on the screen at thesame time.
This image was also inserted for the purpose of inserting space between the questions and the answers.
True. Note the indexing using double square bracket notation.
Go back to Question 5
True.
Go back to Question 4
False. The output is shown in Figure 8 . The code in Figure 6 doesn't recognize the item in parentheses as a tuple. It is being treated as an ordinary variable. It needs a comma to berecognized as a tuple.
| Figure 8 . Question 3 actual output. |
|---|
a |
Go back to Question 3
True.
Go back to Question 2
False. The actual output is shown in Figure 3 . While the parentheses are optional when creating and populating a non-empty tuple, they are not optionalwhen creating an empty tuple.
| Figure 3 . Question 1 actual output. |
|---|
File "1359-1120r-01.py", line 3
t1 =^
SyntaxError: invalid syntax |
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 ofthe 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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