CS177 LAB 2 - Purdue University
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 )
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: ___________________________________
| |Max |Current |
|Exercise 1 |30 | |
|Submission (7) | | |
|-2 points for every wrong question | | |
|Heading and comments (3) | | |
|Exercise 2 |30 | |
|Submission (7) | | |
|Generate random sentence (10) | | |
|Print 5 sentences (10) | | |
|Heading and comments (3) | | |
|Exercise 3 |30 | |
|Submission (6) | | |
|Use for loops (10) | | |
|Print all combinations (10) | | |
|Heading and comments (4) | | |
|Attend your Scheduled Lab |10 | |
|Total: |100 | |
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