Python Programming: An Introduction to Computer Science, 3rd Ed.
3rd Edition
ISBN: 9781590282755
Author: John Zelle
Publisher: Franklin, Beedle & Associates
expand_more
expand_more
format_list_bulleted
Videos
Question
Chapter 2, Problem 3PE
Program Plan Intro
Computing average
- Declare a main function. Inside the main function,
- Print the statement
- Get the three exam scores from the user.
- Calculate the average.
- Print the result.
- Call the main function.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Modify the statistics program from this chapter so that client programshave more flexibility in computing the mean and/ or standard deviation.Specifically, redesign the library to have the following functions:mean(nums) Returns the mean of numbers in nums.stdDev(nums) Returns the standard deviation of nums.meanStdDev (nums) Returns both the mean and standard deviation of nums.
Implement the plus_one function as directed in the comment above the function. If the directions are unclear, run the code, and look at the expected answer for a few inputs. This function should work regardless of whether x is negative or not, and you should not use the ‘+’ symbol anywhere in your solution, nor any constants. To find the solution to this task, you should use your understanding of integer operations to find a way to add 1.
Hint: consider what happens when you do -x. Could you use it with other operations to get x+1?.
#include <stdio.h>#include <stdbool.h>#include <stdlib.h>
// BEGIN STRINGBUILDER IMPLEMENTATION
// This code is a very rudimentary stringbuilder-like implementation// To create a new stringbuilder, use the following line of code//// stringbuilder sb = new_sb();//// If you want to append a character to the stringbuilder, use the// following line of code. Replace whatever character you want to// append where the 'a' is.////…
Instrument FrequencyCounter to use Stopwatch and StdDraw to make a plot where the x-axis is the number of calls on get() or put() and the y-axis is the total running time, with a point plotted of the cumulative time after each call. Run your program for Tale of Two Cities using SequentialSearchST and again using BinarySearchST and discuss the results. Note : Sharp jumps in the curve may be explained by caching, which is beyond the scope of this question.
Chapter 2 Solutions
Python Programming: An Introduction to Computer Science, 3rd Ed.
Ch. 2 - Prob. 1TFCh. 2 - Prob. 2TFCh. 2 - Prob. 3TFCh. 2 - Prob. 4TFCh. 2 - Prob. 5TFCh. 2 - Prob. 6TFCh. 2 - Prob. 7TFCh. 2 - Prob. 8TFCh. 2 - Prob. 9TFCh. 2 - Prob. 10TF
Ch. 2 - Prob. 1MCCh. 2 - Prob. 2MCCh. 2 - Prob. 3MCCh. 2 - Prob. 4MCCh. 2 - Prob. 5MCCh. 2 - Prob. 6MCCh. 2 - Prob. 7MCCh. 2 - Prob. 8MCCh. 2 - Prob. 9MCCh. 2 - Prob. 10MCCh. 2 - Prob. 1DCh. 2 - Prob. 3DCh. 2 - Prob. 4DCh. 2 - Prob. 5DCh. 2 - Prob. 6DCh. 2 - Prob. 7DCh. 2 - Prob. 1PECh. 2 - Prob. 2PECh. 2 - Prob. 3PECh. 2 - Prob. 4PECh. 2 - Prob. 5PECh. 2 - Prob. 6PECh. 2 - Prob. 7PECh. 2 - Prob. 8PECh. 2 - Prob. 9PECh. 2 - Prob. 10PECh. 2 - Prob. 11PECh. 2 - Prob. 12PE
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- For this project, you will import the **time** and **random** modules. You will also install the **matplotlib** package and import from it the **pyplot** module. You will also import the wraps() function from the functools module for use in your decorator.Use the **time** module to write a decorator function named sort_timer that times how many seconds it takes the decorated function to run. Since sort functions don't need to return anything, have the decorator's wrapper function return that elapsed time.To get the current time, call time.perf_counter(). Subtracting the begin time from the end time will give you the elapsed time in seconds.Copy the code for bubble sort and insertion sort from Module 4 and decorate them with sort_timer. def bubble_sort(a_list): """ Sorts a_list in ascending order """ for pass_num in range(len(a_list) - 1): for index in range(len(a_list) - 1 - pass_num): if a_list[index] > a_list[index + 1]:…arrow_forwardPlease help me complete this project. I am very confused and lost. The main() function for this project is in Arithmetic.cpp; it queries the end user for a string arithmetic expression. The main() function calls the eval() function to evaluate and return the result of the arithmetic expression passed as a parameter. Lastly, the main() function displays the result to the end user. Any number of expressions may be evaluated. The main() function is completed. You are responsible for the implementation of the eval() function. The eval() function parameter will be a string consisting of a properly formed arithmetic expression using only the values 0 through 9 and + (addition), - (subtraction), * (multiplication), / (division), and/or ^ (exponentiation) operators. The expression will not include decimals, negative values, or values above 9. The expression will not include parenthesis but may include spaces, which should be skipped. The eval() function needs to use two ArrayStacks:…arrow_forwardWrite a program that creates the multi-panel plot shown below, for Planck curves at 4 different temperatures Planck Curves Use embedded noninteractive plotting and set the figure size to be 10x5 inches. • You may write your program in a single cell, or break it over multiple cells. Use a logarithmic x axes, and the logspace() function for generating the axes values. You will have to be careful with units on this one. For 50% extra credit have your program use a loop over the four axes, with all the plotting code contained within the loop (except for any subplot adjustments). 0.030 12 300K 1000K 0.025 10 0.020 FBBX (Wm-nm-1) FBBA (Wm-2nm-¹) 0.015 10 0.010 0.005 2 0.000 A (nm) λ (nm) 100000 3000 3000K 6000K 2500 80000 2000 60000 FBBA (Wm-2nm-¹) FBBX (Wm-2nm-1) 1500 40000 1000 20000 500 0 101 102 0 101 103 104 105 106 102 103 104 105 106 X (nm) λ (nm) python languagearrow_forward
- Implement the function total_price, which takes in a list of prices of individual products and needs to find the total price. Unfortunately, any product that is priced greater than or equal to $20 has a 50 percent tax, so include that in the final price. Try to do this in one line! Cast your final answer to an integer to avoid floating point precision errors. For example, if x contains your final answer, return int(x)! def total_price(prices): Finds the total price of all products in prices including a 50% tax on products with a price greater than or equal to 20. >>> total_price ([5, 20, 30, 71) 87 total_price([8, 4, 3]) >>> total_price ([10, 100, 4]) 164 >>> 15 "*** YOUR CODE HERE ***"arrow_forwardRewrite Exercise 3.4 using the following func tion to return the area of a pentagon: def area(s):arrow_forwardConsider again a list of fridge temperatures that should be kept within a certain range, as described in Question 9. Write a program that prints the percentage of readings that are outside the allowed range (0 to 5 degrees Celsius), as shown in the examples below. Note that the percentage is printed as an integer, rounded down, and that there is a space before the percentage sign. You need to decompose this problem into sub-problems and instantiate and combine the corresponding patterns. If you need to compute the length or sum of a list, you may use the list operations len() and sum() instead of programming them from scratch using the counting and aggregator patterns. Use variable names appropriate to the problem at hand instead of the generic names used by the patterns. Use the get_input() operation to get the input list. For example: Input Result [5, 4, 3, 2, -1, 0] 16 % of values are outside the range [4.7, 5.2] 50 % of values are outside the range…arrow_forward
- Write a function called has_duplicates that takes a string parameter and returns True if the string has any repeated characters. Otherwise, it should return False. Implement has_duplicates by creating a histogram using the histogram function above. Do not use any of the implementations of has_duplicates that are given in your textbook. Instead, your implementation should use the counts in the histogram to decide if there are any duplicates. Write a loop over the strings in the provided test_dups list. Print each string in the list and whether or not it has any duplicates based on the return value of has_duplicates for that string. For example, the output for "aaa" and "abc" would be the following. aaa has duplicatesabc has no duplicates Print a line like one of the above for each of the strings in test_dups. test_dups = ["zzz","dog","bookkeeper","subdermatoglyphic","subdermatoglyphics"]arrow_forwardthe second image is the expected output. So the dotted area, I'm not sure what to implement. I believe the while statement is correct for using getline, although correct me if I'm wrong. Also use C++, and this is utilizing vectors as well. just the while and for loop, thanks!arrow_forwardUsing a csv file attached (https://file.io/NMvbdnv4E3r0), Create a program on python that use the csv file. The program should accept a user's input of a compound. It should output the molar mass (in 2 decimal places only) of the compound.by using the csv file to compute for the atomic mass at name of the elements. Furthermore, if the "elements involved" are wrong an invallid message should be outputted and only existing chemical symbols are the output. The same goes for wrong input of the "number of atoms" wherein a wrong an invallid message should be outputted and only integers are to be inputted by the user. Program should look like this: Enter compound: C6H12O6 Enter elements involved: C,H,O Enter no. of Carbon atoms: AA Enter no. of Hydrogen atoms: 12 Enter no. of Oxygen atoms: 6 Wrong input of number of atoms! Try again. or Enter compound: C6H12O6 Enter elements involved: C,H,O Enter no. of Carbon atoms: 6 Enter no. of Hydrogen atoms: 12 Enter no. of Oxygen atoms: 6…arrow_forward
- Write a program that loads in historical data on popular baby-names for the last 100 years. You can type in a name, and it graphs the rank of that name over time. A high ranking, like 5, means the name was the 5th most popular that year (top of the graph), while a low ranking like 879 means the name was not that popular (bottom of the graph). Write it in python the latest version The first function you will write and test is the clean_data function. The function is described in the starter code in a function header comment above the function. Here is the function: def clean_data(list, x): #TODO: write your code here pass Take a look at the first few lines of the data file: A 83 140 228 286 426 612 486 577 836 0 0 Aaliyah 0 0 0 0 0 0 0 0 0 380 215 Aaron 193 208 218 274 279 232 132 36 32 31 41 Each line is a baby name followed by how popular the name was in 11 different years. Each number is a ranking, so Aaron was 193th most popular name in 1900 and 41st most popular name in…arrow_forwardWrite a program that loads in historical data on popular baby-names for the last 100 years. You can type in a name, and it graphs the rank of that name over time. A high ranking, like 5, means the name was the 5th most popular that year (top of the graph), while a low ranking like 879 means the name was not that popular (bottom of the graph). Write it in python the latest version The first function you will write and test is the clean_data function. The function is described in the starter code in a function header comment above the function. Here is the function: def clean_data(list, x): #TODO: write your code here pass Take a look at the first few lines of the data file: A 83 140 228 286 426 612 486 577 836 0 0 Aaliyah 0 0 0 0 0 0 0 0 0 380 215 Aaron 193 208 218 274 279 232 132 36 32 31 41 Each line is a baby name followed by how popular the name was in 11 different years. Each number is a ranking, so Aaron was 193th most popular name in 1900 and 41st most…arrow_forwardWrite a program that loads in historical data on popular baby-names for the last 100 years. You can type in a name, and it graphs the rank of that name over time. A high ranking, like 5, means the name was the 5th most popular that year (top of the graph), while a low ranking like 879 means the name was not that popular (bottom of the graph). Write it in python the latest version The first function you will write and test is the clean_data function. The function is described in the starter code in a function header comment above the function. Here is the function: def clean_data(list, x): #TODO: write your code here pass Take a look at the first few lines of the data file: A 83 140 228 286 426 612 486 577 836 0 0 Aaliyah 0 0 0 0 0 0 0 0 0 380 215 Aaron 193 208 218 274 279 232 132 36 32 31 41 Each line is a baby name followed by how popular the name was in 11 different years. Each number is a ranking, so Aaron was 193th most popular name in 1900 and 41st most…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
C++ for Engineers and ScientistsComputer ScienceISBN:9781133187844Author:Bronson, Gary J.Publisher:Course Technology Ptr
C++ Programming: From Problem Analysis to Program...Computer ScienceISBN:9781337102087Author:D. S. MalikPublisher:Cengage Learning
C++ for Engineers and Scientists
Computer Science
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Course Technology Ptr
C++ Programming: From Problem Analysis to Program...
Computer Science
ISBN:9781337102087
Author:D. S. Malik
Publisher:Cengage Learning
What Are Data Types?; Author: Jabrils;https://www.youtube.com/watch?v=A37-3lflh8I;License: Standard YouTube License, CC-BY
Data Types; Author: CS50;https://www.youtube.com/watch?v=Fc9htmvVZ9U;License: Standard Youtube License