Multilevel Feedback Queue implemented in python

Author: DeepankarAcharyya

Python/Multilevel-Feedback-Queue.py

@@ -0,0 +1,59 @@
+class process:
+    def __init__(self,process_id,arrival_time,burst_time,priority,q,ready):
+        self.process_id=process_id
+        self.arrival_time=arrival_time
+        self.burst_time=burst_time
+        self.priority=priority
+        self.ready=ready
+        self.q=q
+    
+    
+def Queue(t1):
+    t1=int(t1)
+    if(t1==0 or t1==1 or t1==2 or t1==3):
+        return 1
+    else:
+        return 2
+
+
+limit=int(input("Enter Total Number of Processes:"))
+
+Process=[]
+for i in range(limit):
+    pid=int(input("Process ID:"))
+    time=int(input("Arrival Time:"))
+    btime=int(input("Burst Time:"))
+    priority=int(input("Process Priority:"))
+    q=Queue(priority)
+    ready=0
+    Process_1=process(process_id=pid,arrival_time=time,burst_time=btime,priority=priority,q=q,ready=ready)
+    Process.append(Process_1)
+
+time=Process[0].burst_time
+for i in range(limit):
+    for count in range(limit):
+        if Process[count].arrival_time<time:
+            Process[count].ready=1
+    for count in range(i,limit-1):
+        for j in range(count+1,limit):
+            if Process[count].ready==1 and Process[j].ready==1:
+                if Process[count].q==2 and Process[j].q ==1:
+                    temp=Process[count]
+                    Process[count]=Process[j]
+                    Process[j]=temp
+    for count in range(i,limit-1):
+        for j in range(count+1,limit):
+            if Process[count].ready==1 and Process[j].ready==1:
+                if Process[count].q==1 and Process[j].q==1:
+                    if Process[count].burst_time>Process[j].burst_time:
+                        temp=Process[count]
+                        Process[count]=Process[j]
+                        Process[j]=temp
+                    else:
+                        break
+
+    print("\nProcess[%d]:\tTime:\t%d To %d\n" %(Process[i].process_id, time, time + Process[i].burst_time))
+    time=time+Process[i].burst_time
+    for count in range(i,limit):
+        if Process[count].ready==1:
+            Process[count].ready=0