Clean up some recent examples.

docs/books/computer-games/computer-battle-games/the_vital_message/the_vital_message.py

@@ -1,50 +1,38 @@
 # Import 'random' so we can generate random numbers.
 # The 'string' module gives us access to string-related utilities
 # The 'time' module helps us to wait for some time
-
-
 import random
 import string
 import time
-print("VITAL MESSAGE")
+
+print('VITAL MESSAGE')
 
 # Variable to store the difficulty i.e length of string
-level_difficulty = 0
+difficulty = 0
 
 # Loop until the right difficulty level is enterred
-while level_difficulty < 4 or level_difficulty > 10:
-    print("HOW DIFFICULT? (4-10)")
+while difficulty < 4 or difficulty > 10:
+    print('How difficult do you want the game to be? (4-10)')
     x = int(input())
-    level_difficulty = x
-
-# Function to clear the screen
-# This simply clears the screen by printing 64 blank lines
-
-
-def clrsc():
-    print('\n' * 64)
-
-
-# Variable to store the secret message
-message = ""
+    difficulty = x
 
-for i in range(0, level_difficulty):
-    message += (random.choice(string.ascii_letters))
+# Create the secret message
+message = ''.join(
+    random.choice(string.ascii_letters)
+    for i in range(0, difficulty)
+)
 
-print("SEND THIS MESSAGE:")
+print('Send this message:')
 print(message)
 
-# Displaying the secret message in accordance of the difficulty level
-time.sleep(0.5 * level_difficulty)
-clrsc()
+# Display the secret message in accordance with the difficulty level
+time.sleep(0.5 * difficulty)
 
-print("Enter the secret code that need to be transferred")
-code = input()
+code = input('Enter the secret code that need to be transferred')
 
-if(code == message):
-    print("MESSAGE CORRECT")
-    print("THE WAR IS OVER")
+if code == message:
+    print('MESSAGE CORRECT')
+    print('The war is over!')
 else:
-    print("YOU GOT IT WRONG")
-    print("YOU SHOULD HAVE SENT:")
-    print(message)
+    print('YOU GOT IT WRONG')
+    print('You should have sent:', message)

docs/books/computer-games/creepy-computer-games/computer_nightmare/computer_nightmare.py

@@ -1,4 +1,3 @@
-
 # Import 'random' so we can generate random numbers.
 import random
 
@@ -7,40 +6,40 @@
 
 # List of comments for making the game a more fun!
 comments = [
-        "** MICROS RULE! **", "*PEOPLE ARE SUPID*",
-        "+A ROBOT FOR PRESIDENT!", "!COMPUTERS ARE GREAT!",
-        "*I'M BETTER THAN YOU!*"
-        ]
+    '** MICROS RULE! **',
+    '*PEOPLE ARE SUPID*',
+    '+A ROBOT FOR PRESIDENT!',
+    '!COMPUTERS ARE GREAT!',
+    'I AM BETTER THAN YOU!',
+]
+
+# Print a heading
+print('  Number   Score')
+print('~~~~~~~~~~~~~~~~')
 
 # Loop while the score is not above 500 i.e you have won,
 # or less than 0 means you have lost the game
 while score > 0 and score < 500:
-    # Number that will be appeared on screen
+    # Number that will appear on screen
     number = random.randint(1, 9)
-    print("   %d" % (number))
-    print("                     %d" % (score))
+    print('    %4d    %4d' % (number, score))
 
-    if random.randint(1, 9) > 5:
+    if random.random() > 0.5:
         print(comments[int(score/100)])
-
     else:
         if score < 60:
-            print("THERE IS NO HOPE")
+            print('THERE IS NO HOPE')
         elif score > 440:
-            print("URK! HELP!!")
+            print('URK! HELP!!')
 
-    print("ENTER THE ANSWER")
-    answer = int(input())
+    answer = int(input('Enter your guess:'))
     # If you have guessed right increase the score
     if answer == number:
         score = score + number * 2
-
     else:
         score = score - 10
 
-
 if score < 0:
-    print("YOU'RE NOW MY SLAVE")
-
+    print('YOU ARE NOW MY SLAVE')
 else:
-    print("OKAY! YOU WIN (THIS TIME)")
+    print('OK... you win... (this time)')