Example for Episode 16

episode16/randomizer.py

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+#!/usr/bin/env python
+
+# Coding 101: Randomizer
+# 
+# Written by Erik C. Thauvin (erik@thauvin.net)
+# http://erik.thauvin.net/
+# http://github.com/ethauvin/coding101/
+# May 9, 2014
+
+# Import the randrange function
+from random import randrange
+
+# The maximum number of random numbers to generate
+max = 100
+# The name of the file to write the number to
+fileName = 'random.txt'
+
+# Initialize the list of random numbers
+randomNumbers = []
+
+print
+print 'Generating ' + str(max) + ' random numbers...'
+print
+
+# Initialize the print counter
+printCounter = 0
+# Loop until we have 100 random numbers in our list
+while len(randomNumbers) < max:
+    # Get a random number between 0 and 100
+    randint = randrange(max)
+    # Append the random number to our list
+    randomNumbers.append(randint)
+    # Print the random number, converted to a string and right justified
+    # The comma at the end prevents a new line from being printed
+    print '  ' + str(randint).rjust(2),
+    # Increment the print counter, same as: printCounter = printerCounter + 1
+    printCounter += 1
+    # If the print counter is 10, print a new line, and reset the counter
+    if printCounter == 10:
+        print
+        printCounter = 0
+
+print
+raw_input('Press ENTER to continue...')
+
+print
+print 'Sorting...'
+print
+
+# Sort the numbers
+randomNumbers.sort()
+
+# Open the file for writing, it will be closed automatically when done
+with open(fileName, 'w') as f:
+    printCounter = 0
+    # Loop through our random number list.
+    for number in randomNumbers:
+        # Write the number to the file, followed by a new line
+        f.write(str(number) + '\n')
+        # Also print the number on screen
+        print '  ' + str(number).rjust(2),
+        printCounter += 1
+        if printCounter == 10:
+            print
+            printCounter = 0
+
+print
+print 'The numbers have been written to "' + fileName + '"'
+print
+
+raw_input('Press ENTER to quit...')