Python help please. Question 1: implement available_tasks and mark_completed.[ ]1 ### Implementation of available_tasks and mark_completed".23 def scheduler_available_tasks(self):4"""Returns the set of tasks that can be done in parallel.56A task can be done if all its predecessors have been completed.And of course, we don't return any task that has already beencompleted."*****78# YOUR CODE HERE910 def scheduler_mark_completed(self, t):11"""Marks the task t as completed, and returns the additionalset of tasks that can be done (and that could not be1213previously done) once is completed.""14# YOUR CODE HERE1516 DependencyScheduler.available_tasks = property (scheduler_available_tasks)17 DependencyScheduler.mark_completed = scheduler_mark_completed181 # Here is a place where you can test your code.23 # YOUR CODE HERE4Let us check if this works.[ ] 1 s = DependencyScheduler ()2 s.add_task('a', ['b', 'c'])3 s.add_task('b', ['c', 'e'])4 s._check()5 s.show()6[ ] 45 class678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758DependencyScheduler(object):def __init__(self):self.tasks = set()# The successors of a task are the tasks that depend on it, and can# only be done once the task is completed.self.successors = defaultdict(set)# The predecessors of a task have to be done before the task.self.predecessors defaultdict (set)self.completed_tasks = set() # completed tasks.def add_task(self, t, dependencies):"""Adds a task t with given dependencies.""# Makes sure we know about all tasks mentioned.assert t not in self.tasks or len(self.predecessors[t]) == 0, "The task was already presself.tasks.add(t)self.tasks.update (dependencies)# The predecessors are the tasks that need to be done before.self.predecessors[t] = set (dependencies)# The new task is a successor of its dependencies.for u in dependencies:self.successors[u].add(t)def reset(self):self.completed_tasks = set()@propertydef done(self):return self.completed_tasks == self.tasksdef show(self):"""We use the nx graph to display the graph.""g = nx.DiGraph()g.add_nodes_from(self.tasks)g.add_edges_from([(u, v) for u in self.tasks for v in self.successors[u]])node_colors = ''.join([('g' if v in self.completed_tasks else 'r').for v in self.tasks])nx.draw(g, with_labels=True, node_color=node_colors)plt.show()@propertydef uncompleted (self):"""Returns the tasks that have not been completed.This is a property, so you can say scheduler.uncompleted rather thanscheduler.uncompleted ()"""*return self.tasks self.completed_tasksdef _check(self):"""We check that if t is a successor of u, then u is a predecessorof t.***for u in self.tasks:for t in self.successors[u]:assert u in self.predecessors[t]

Redo in cooking - The act of redoing a cooking step is slightly different from redoing something in…

e def scheduler_mark_completed(self, t): 1 ***Marks the task t as completed, and returns the additional 2 set of tasks that can be done (and that could not be 3 previously done) once t is completed.*** 4 # YOUR CODE HERE 5 6 DependencyScheduler.available_tasks = property (scheduler_available_tasks) 7 DependencyScheduler.mark_completed = scheduler_mark_completed 8 WN HO 00

e def scheduler_mark_completed(self, t): 1 Marks the task t as completed, and returns the additional 2 set of tasks that can be done (and that could not be 3 previously done) once t is completed. 4 # YOUR CODE HERE 5 6 DependencyScheduler.available_tasks = property (scheduler_available_tasks) 7 DependencyScheduler.mark_completed = scheduler_mark_completed 8 WN HO 00

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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23.5 LAB: Random values (Use Python) In main.py define the RandomNumbers class, which has three integer attributes: var1, var2, and var3. Write getter method for each attribute: get_var1(), get_var2() and get_var3(). Then write the following 2 instance methods: set_random_values( ) - accepts a low and high integer values as parameters, and sets var1, var2, and var3 to random numbers within the range of the low and high input values (inclusive). get_random_values( ) - prints out the 3 random numbers in the format: "Random values: var1 var2 var3" Ex: If the input is: 15 20 the output may be: Random values: 17 15 19 where 17, 15, 19 can be any random numbers within 15 and 20 (inclusive). Note: When submitted, your program will be tested against different input range to verify if the three randomly generated values are within range.
Create a class named Student that has three member variables: name – A string that stores the name of the student numClasses – An integer that tracks how many courses the student is currently enrolled in classList – A dynamic array of strings used to store the names of theclasses that the student is enrolled in Write appropriate constructor(s), mutator, and accessor functions for the classalong with the following: • A function that inputs all values from the user, including the list of class names.This function will have to support input for an arbitrary number of classes. • A function that outputs the name and list of all courses. • A function that resets the number of classes to 0 and the classList to anempty list. • An overloaded assignment operator that correctly makes a new copy of the listof courses. • A destructor that releases all memory that has been allocated. Write a main function that tests all of your functions. use c++
#ClubMember classclass ClubMember: #__init_ functiondef __init__(self,id,name,gender,weight,phone):self.id = idself.name = nameself.gender = genderself.weight = weightself.phone = phone #__str__ functiondef __str__(self):return "Id:"+str(self.id)+",Name:"+self.name+",Gender:"+self.gender+",Weight:"+str(self.weight)+",Phone:"+str(self.phone) #Club classclass Club: #__init__ functiondef __init__(self,name):self.name = nameself.members = {}self.membersCount = 0 def run(self):print("Welcome to "+self.name+"!")while True:print("""1. Add New Member2. View Member Info3. Search for a member4. Browse All Members5. Edit Member6. Delete a Member7. Exit""") choice = int(input("Choice:")) if choice == 1:self.membersCount = self.membersCount+1id = self.membersCountname = input("Member name:")gender = input("Gender:")weight = int(input("Weight:"))phone = int(input("Phone No.")) member = ClubMember(id,name,gender,weight,phone)self.members[id] = memberelif choice == 2:name = input("Enter name of…
JAVA PROGRAM ASAP *********** THIS PROGRAM MUST WORK IN HYPERGRADE AND PASS ALL THE TEST CASES. Please create a program BECAUSE IT IS. MY HOMEWORK ASSIGNMENT with the following parts which are down below: The left index is inclusive and the right index is exclusive. 1. public static void bubbleSort(int[] array, int left, int right) { // your code here } 2. public static void insertionSort(int[] array, int left, int right) { // your code here } 3. public static void selectionSort(int[] array, int left, int right) { // your code here } Test Case 1 Please enter a space separated list of numbers to sort or type QUIT to exit:\n4 3 2 1ENTERSorting first half of the array using Bubble Sort algorithm:\n3 4 2 1\nSorting second half of the array using Bubble Sort algorithm:\n4 3 1 2\nSorting the array using Bubble Sort algorithm:\n1 2 3 4\nSorting first half of the array using Insertion Sort algorithm:\n3 4 2 1\nSorting second half of the array using Insertion…
Python Code please Point of Sale Write a program that will manage the point of sale in a store. Build the ItemToPurchase class with the following: Attributes item_name (string) item_price (int) item_quantity (int) Default constructor Initializes item's name = "none", item's price = 0, item's quantity = 0 Method print_item_cost() Example of print_item_cost() output:Bottled Water 10 @ $1 = $10 Extend the ItemToPurchase class to contain a new attribute. item_description (string) - Set to "none" in default constructor Implement the following method for the ItemToPurchase class. print_item_description() - Prints item_description attribute for an ItemToPurchase object. Has an ItemToPurchase parameter. Example of print_item_description() output:Bottled Water: Deer Park, 12 oz. Build the ShoppingCart class with the following data attributes and related methods. Note: Some can be method stubs (empty methods) initially, to be completed in later steps. Parameterized constructor…
23.2 LAB: Calculator class (Use Python) In the file main.py write a class called Calculator that emulates basic functions of a calculator: add, subtract, multiply, divide, and clear. The class has one attribute called value for the calculator's current value. Implement the following methods as listed below: Default constructor method to set the attribute to 0.0 add(self, val) - add the parameter to the attribute subtract(self, val)- subtract the parameter from the attribute multiply(self, val) - multiply the attribute by the parameter divide(self, val)- divide the attribute by the parameter clear(self) - set the attribute to 0.0 get_value(self) - return the attribute Given two float input values num1 and num2, the program outputs the following values: The initial value of the instance attribute, value The value after adding num1 The value after multiplying by 3 The value after subtracting num2 The value after dividing by 2 The value after calling the clear() method Ex: If…
1. Create a class Employee with parameters name, id, designation, and basicSalary. Use appropriate datatypes and access specifiers. Use default constructor to create objects of employee. Write methods toset and get the values of parameters of employee. Write methods to find total salary of employee andto display the complete details of employee along with total salary. Create another class TestEmployeewhich creates array of n number of employees, uses appropriate set methods to set the values ofparameters of every employee. Display the details of each employee. (Total salary = basic salary + 80%of basic salary)
2. Insert a function that prints a greeting, and execute it on the p1 object class Person: def __init__(self, name, age): self.name = name self.age = age ________________ ____________________________________p1 = Person("John", 36)p1.myfunc()
Start with this class declaration: class Student { int sId; String name; double gpa;} Implement a Comparable and Comparator interface to provide the following three (3) alternative ways of ordering for the Student objects - based on sId (i.e., assume that this is selected as the natural ordering)- based on name, - based on gpa. Next declare a list of five Student objects, initialize them with random values. Test your code by printing out each of the following on separate lines: (original list of students, sorted list of students in ascending sId order, sorted list of students in ascending name order, sorted list of students in ascending gpa order).
class Student(object): """Represents a student.""" def __init__(self, name, number): """All scores are initially 0.""" self._name = name self._scores = [] for count in range(number): self._scores.append(0) def getName(self): """Returns the student's name.""" return self._name def setScore(self, i, score): """Resets the ith score, counting from 1.""" self._scores[i - 1] = score def getScore(self, i): """Returns the ith score, counting from 1.""" return self._scores[i - 1] def getAverage(self): """Returns the average score.""" return sum(self._scores) / len(self._scores) def getHighScore(self): """Returns the highest score.""" return max(self._scores) def __str__(self): """Returns the string representation of the student.""" return "Name: " + self._name + "\nScores: " + \ " ".join(map(str, self._scores))
Implement a PowerSeller class that is derived from the Seller class. Create the powerseller.h andpowerseller.cpp files for this class. This derived class contains additional data members include:o the seller’s own web site address (string),o number of items sold in the current year.Methods included in this derived class are:• A default constructor and a copy constructor• A value constructor that receives all data for a power seller• Appropriate get and set functions for the new data• print() – overrides the parent class print() method. This method should call the Sellerclass print method to display all the information from a Person class and the seller class,and also display the additional power seller data with appropriate messages.• read() – overrides the parent class read() method. This method should call the Seller classread method to read all the information for Person class and seller class, and also read inthe information for the specific data for a Power Seller. The addition…
2. Insert a function that prints a greeting, and execute it on the p1 object class Person: def __init__(self, name, age): self.name = name self.age = age ________________ ____________________________________