Add docstring at the beginning of all .py files

algos/cpu_scheduling.py

@@ -1,3 +1,7 @@
+'''
+This file contains the implementation of CPU Scheduling algorithms
+'''
+
 from sys import maxsize
 from operator import itemgetter
 import Queue

algos/deadlock.py

@@ -1,3 +1,7 @@
+'''
+This file contains the implementation of Deadlock Detection and Avoidance algorithms
+'''
+
 import copy
 
 # Bad input case(s):

algos/disk_scheduling.py

@@ -1,3 +1,7 @@
+'''
+This file contains the implementation of Disk Scheduling algorithms
+'''
+
 from sys import maxint
 from random import choice
 

algos/memory_allocation.py

@@ -1,3 +1,7 @@
+'''
+This file contains the implementation of Memory Allocation strategies
+'''
+
 from operator import itemgetter
 from copy import deepcopy
 

algos/page_replacement.py

@@ -1,3 +1,7 @@
+'''
+This file contains the implementation of Page Replacement algorithms
+'''
+
 from copy import deepcopy
 from sys import maxint
 from random import randint

main.py

@@ -1,3 +1,7 @@
+'''
+This file defines the Kivy app and loads the screens and their layouts
+'''
+
 # Kivy libraries
 from kivy.app import App
 from kivy.lang import Builder

screens/cpu_screens.py

@@ -1,3 +1,8 @@
+'''
+This file contains the classes, functions and globals used for visualizing
+CPU Scheduling algorithms
+'''
+
 # Kivy libraries
 from kivy.core.window import Window
 from kivy.graphics import Color, Rectangle

screens/deadlock_avoidance_screens.py

@@ -1,3 +1,8 @@
+'''
+This file contains the classes, functions and globals used for visualizing
+Deadlock Avoidance algorithms
+'''
+
 # Kivy libraries
 from kivy.properties import ObjectProperty
 from kivy.uix.scrollview import ScrollView

screens/deadlock_detection_screens.py

@@ -1,3 +1,8 @@
+'''
+This file contains the classes, functions and globals used for visualizing
+Deadlock Detection algorithms
+'''
+
 # Kivy libraries
 from kivy.properties import ObjectProperty
 from kivy.uix.scrollview import ScrollView

screens/disk_screens.py

@@ -1,3 +1,8 @@
+'''
+This file contains the classes, functions and globals used for visualizing
+Disk Scheduling algorithms
+'''
+
 # Kivy libraries
 from kivy.core.window import Window
 from kivy.graphics import Color, Line

screens/memory_screens.py

@@ -1,3 +1,8 @@
+'''
+This file contains the classes, functions and globals used for visualizing
+Contiguous Memory Allocation Strategios
+'''
+
 # Kivy libraries
 from kivy.core.window import Window
 from kivy.graphics import Color, Rectangle

screens/page_screens.py

@@ -1,3 +1,8 @@
+'''
+This file contains the classes, functions and globals used for visualizing
+Page Replacement algorithms
+'''
+
 # Kivy libraries
 from kivy.core.window import Window
 from kivy.properties import ObjectProperty, NumericProperty