Download CS177 LAB 5

CS177 LAB 5
Before the Lab
Study Chapter 5 of the textbook.
Setting up your Environment
Go to your working directory in “data.cs.purdue.edu” and create a directory
“cs177/lab05”. Refer to the first lab or the other handouts on the course page if you
need to remember the steps to do so. Then start the IDLE Python Interpreter.
Exercise 1
Complete the following program to display the output expected by replacing every “?”
string with an appropriate string or list function (e.g. s[0]). Do not use string
constants (e.g. “Hello World”).
#
# lab5-1.py:
# Complete the following program to print the desired output.
#
def Main():
s = "I love Python Programming."
y = " Yes!"
print()
print("Char at index 10 of s:", "?")
print()
print("Chars 2 to 5 inclusive of s: ", "?")
print()
print("Last character of s:", "?")
print()
print("Length of s:", "?")
print()
print("s repeated 3 times:", "?")
print()
print("s concatenated with y:", s + y)
print()
#You are not allowed to just type in the new sentence, manipulate the given string s.
print("I love Programming Python: ", "?")
print()
l=["Sunday", "Monday", "Tuesday",
"Wednesday", "Thursday", "Friday", "Saturday"]
print("Weekdays:", "?")
print()
print("Weekend:", "?")
print()
print("Two weeks:", "?")
print()
print("Days of the week:")
for i in range(len(l)):
print("?")
Main()
This is the expected output:
Char at 10 of s: h
Chars 2 to 5 inclusive of s: love
Last character of s: .
Length of s: 26
s repeated 3 times: I love Python Programming.I love Python Programming.I love Python
Programming.
s concatenated with y: I love Python Programming. Yes!
I love Programming Python: I love Programming Python
Weekdays: ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday']
Weekend: ['Sunday', 'Saturday']
Two weeks: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday',
'Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']
Days of the week:
0 : Sunday
1 : Monday
2 : Tuesday
3 : Wednesday
4 : Thursday
5 : Friday
6 : Saturday
Save the program in cs177/lab05/mystring.py.
Exercise 2
Write a program that will generate 5 random sentences. The random sentences will be
built using one component from each of the following lists:
subjects + verbs + objects + endings
where:
subjects=['I','You','Bob','John','Sue','Kate',
'The lizard people']
verbs=['will search for','will get',
'will find','attained','found',
'will start interacting with',
'will accept','accepted']
objects=['Billy','an apple','a Triforce',
'the treasure','a sheet of paper']
endings=['.',', right?','.',
', like I said.','.',', just like you.']
(Lists based on the sentence generator in http://pastehtml.com/view/1c0gckz.html)
You can use the function:
from random import *
s = choice(subjects)
print s
where choice will choose a random component from the sequence “subjects”.
Your program should print 5 random sentences.
Example:
>>>
Sue will accept a Triforce .
I attained a sheet of paper , like I said.
Sue accepted the treasure .
John will get the treasure , just like you.
Kate will get Billy , just like you.
>>>
Save the program in cs177/lab05/sentences.py.
Exercise 3
Given the following lists of colors and fruits, write a program that generates all possible
combinations. Hint: Use two nested for loops.
fruits = [ "apple", "strawberry", "banana", "pear", "watermelon", "tomato"]
color = ["green", "red", "blue", "orange", "pink", "violet"]
Example output:
>>>
green apple
red apple
blue apple
orange apple
pink apple
violet apple
green strawberry
red strawberry
blue strawberry
orange strawberry
pink strawberry
violet strawberry
green banana
red banana
blue banana
…
Save the program in cs177/lab05/combinations.py.
Turnin your project
Run PuTTY and login to data.cs.purdue.edu.
Turn in your lab by typing:
cd cs177
turnin –v –c cs177 –p lab05 lab05
(Remember that the final “lab05” is the name of your folder.)
Lab5 Grading Form
Name: ___________________________________
Login: ___________________________________
Exercise 1
Submission (7)
-2 points for every wrong question
Heading and comments (3)
Exercise 2
Submission (7)
Generate random sentence (10)
Print 5 sentences (10)
Heading and comments (3)
Exercise 3
Submission (6)
Use for loops (10)
Print all combinations (10)
Heading and comments (4)
Attend your Scheduled Lab
Total:
Max
30
30
30
10
100
Current