This Python script implements three process scheduling algorithms: FCFS (First-Come, First-Served), SJF (Shortest Job First), and RR (Round Robin). It includes a class Process with attributes such as name, arrival time, burst time, start time, and end time. The script also utilizes the collections.deque for the Round Robin algorithm and matplotlib.pyplot for visualizing the Gantt chart.
Process(name, arrival_time, burst_time): Initializes a process with the given attributes.
fcfs(processes): Implements the FCFS scheduling algorithm and returns the Gantt chart.sjf(processes): Implements the SJF scheduling algorithm and returns the Gantt chart.rr(processes, time_quantum): Implements the Round Robin scheduling algorithm with a specified time quantum and returns the Gantt chart.
draw_gantt_chart(gantt_chart): Usesmatplotlib.pyplotto draw and display the Gantt chart based on the provided Gantt chart data.
main(): Initializes a list of processes and callsshow_menu()to allow the user to choose a scheduling algorithm.show_menu(processes): Displays a menu for selecting a scheduling algorithm, takes user input, and calls the corresponding scheduling function.
The script includes a sample list of processes (processes) with their names, arrival times, and burst times.
The main() function is executed, initiating the program and prompting the user to choose a scheduling algorithm. The selected algorithm's Gantt chart is then displayed using the draw_gantt_chart() function.